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Prof. Dr. Prof. Dr. Ambrish Singh
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China

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0 Computational Chemistry
0 Corrosion Inhibitors
0 Green Chemistry
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Journal article
Published: 01 August 2021 in International Journal of Electrochemical Science
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ACS Style

Shivani Singh. Ethanolic Extract of Cockroach Wing Powder as Corrosion Inhibitor for N80 Steel in an ASTM D1141-98(2013) Standard Artificial Seawater Solution. International Journal of Electrochemical Science 2021, 1 .

AMA Style

Shivani Singh. Ethanolic Extract of Cockroach Wing Powder as Corrosion Inhibitor for N80 Steel in an ASTM D1141-98(2013) Standard Artificial Seawater Solution. International Journal of Electrochemical Science. 2021; ():1.

Chicago/Turabian Style

Shivani Singh. 2021. "Ethanolic Extract of Cockroach Wing Powder as Corrosion Inhibitor for N80 Steel in an ASTM D1141-98(2013) Standard Artificial Seawater Solution." International Journal of Electrochemical Science , no. : 1.

Journal article
Published: 25 February 2021 in Nanomaterials
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In spite of the growing demand for new antibiotics, in the recent years, the occurrence of fluoroquinolone antibiotics (as a curative agent for urinary tract disorders and respiratory problems) in wastewater have drawn immense attention. Traces of antibiotic left-overs are present in the water system, causing noxious impact on human health and ecological environments, being a global concern. Our present work aims at tackling the major challenge of toxicity caused by antibiotics. This study deals with the efficient adsorption of two commonly used fluoroquinolone (FQ) antibiotics, i.e., Ofloxacin (OFX) and Moxifloxacin (MOX) on spherical hydrogel beads generated from methionine‒functionalized graphene oxide/ sodium alginate polymer (abbreviated Met-GO/SA) from aqueous solutions. The composition, morphology and crystal phase of prepared adsorbents were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), high-resolution transmission electron microscopy (HR-TEM) and thermogravimetric analysis/differential thermogravimetry (TGA/DTG). Batch adsorption tests are followed to optimize the conditions required for adsorption process. Both functionalized and non-functionalized adsorbents were compared to understand the influence of several experimental parameters, such as, the solution pH, contact time, adsorbent dosage, temperature and initial concentration of OFX and MOX on adsorption. The obtained results indicated that the functionalized adsorbent (Met-GO/SA) showed a better adsorption efficiency when compared to non-functionalized (GO/SA) adsorbent. Further, the Langmuir isotherm was validated as the best fitting model to describe adsorption equilibrium and pseudo second-order-kinetic model fitted well for both types of adsorbate. The maximum adsorption capacities of Met-GO/SA were 4.11 mg/g for MOX and 3.43 mg/g for OFX. Thermodynamic parameters, i.e., ∆G°, ∆H° and ∆S° were also calculated. It was shown that the overall adsorption process was thermodynamically favorable, spontaneous and exothermic in nature. The adsorbents were successfully regenerated up to four cycles with 0.005 M NaCl solutions. Overall, our work showed that the novel Met-GO/SA nanocomposite could better contribute to the removal of MOX and OFX from the liquid media. The gel beads prepared have adequate features, such as simple handling, eco-friendliness and easy recovery. Hence, polymer gel beads are promising candidates as adsorbents for large-scale water remediation.

ACS Style

Sushma Yadav; Anupama Asthana; Ajaya Singh; Rupa Chakraborty; S. Vidya; Ambrish Singh; Sónia Carabineiro. Methionine-Functionalized Graphene Oxide/Sodium Alginate Bio-Polymer Nanocomposite Hydrogel Beads: Synthesis, Isotherm and Kinetic Studies for an Adsorptive Removal of Fluoroquinolone Antibiotics. Nanomaterials 2021, 11, 568 .

AMA Style

Sushma Yadav, Anupama Asthana, Ajaya Singh, Rupa Chakraborty, S. Vidya, Ambrish Singh, Sónia Carabineiro. Methionine-Functionalized Graphene Oxide/Sodium Alginate Bio-Polymer Nanocomposite Hydrogel Beads: Synthesis, Isotherm and Kinetic Studies for an Adsorptive Removal of Fluoroquinolone Antibiotics. Nanomaterials. 2021; 11 (3):568.

Chicago/Turabian Style

Sushma Yadav; Anupama Asthana; Ajaya Singh; Rupa Chakraborty; S. Vidya; Ambrish Singh; Sónia Carabineiro. 2021. "Methionine-Functionalized Graphene Oxide/Sodium Alginate Bio-Polymer Nanocomposite Hydrogel Beads: Synthesis, Isotherm and Kinetic Studies for an Adsorptive Removal of Fluoroquinolone Antibiotics." Nanomaterials 11, no. 3: 568.

Journal article
Published: 26 August 2020 in Construction and Building Materials
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Two new acridinedione namely 3,3,6,6-Tetramethyl-9,10-diphenyl-3,4,6,7,9,10-hexahydro-1,8-(2H,5H)-acridinedione (ACD-1), and 9-(4-methoxyphenyl)-3,3,6,6-tetramethyl-10-phenyl-3,4,6,7,9,10-hexahydroacridine-1,8(2H,5H)-dione (ACD-2) were synthesized and tested as prominent inhibitors for N80 steel corrosion inhibition in 15% hydrochloric acid (HCl). The weight loss result showed maximum efficiency of 97.3% (ACD-2) and Langmuir isotherm model best explained the adsorption of ACDs. EIS study reveals Rct value increased to a maximum of 816.4 Ωcm2 with the inhibition efficiency of 95.6% at 600 mg/L (ACD-2). The results of PDP proposed that ACDs are mixed but cathodic dominance inhibitors. The scanning electron microscopy (SEM) and atomic force microscopy (AFM) tests supports the adsorption of ACDs molecules onto the N80 steel surface. Intermolecular interactions and dynamics were studied using density functional theory (DFT) and molecular dynamics (MD).

ACS Style

Ambrish Singh; Kashif R. Ansari; Ekemini Ituen; Lei Guo; Abdul Wahab; M.A. Quraishi; Xiangwei Kong; Yuanhua Lin. A new series of synthesized compounds as corrosion mitigator for storage tanks: Detailed electrochemical and theoretical investigations. Construction and Building Materials 2020, 259, 120421 .

AMA Style

Ambrish Singh, Kashif R. Ansari, Ekemini Ituen, Lei Guo, Abdul Wahab, M.A. Quraishi, Xiangwei Kong, Yuanhua Lin. A new series of synthesized compounds as corrosion mitigator for storage tanks: Detailed electrochemical and theoretical investigations. Construction and Building Materials. 2020; 259 ():120421.

Chicago/Turabian Style

Ambrish Singh; Kashif R. Ansari; Ekemini Ituen; Lei Guo; Abdul Wahab; M.A. Quraishi; Xiangwei Kong; Yuanhua Lin. 2020. "A new series of synthesized compounds as corrosion mitigator for storage tanks: Detailed electrochemical and theoretical investigations." Construction and Building Materials 259, no. : 120421.

Journal article
Published: 15 June 2020 in Construction and Building Materials
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The ability of Guar Gum grafted 2-Acrylamido-2-Methylpropanesulfonic Acid (GG-AMPS) to mitigate the corrosion of carbon steel in ASTM standard D1141-98(2013) artificial seawater was examined using gravimetric (mass loss), theoretical simulations, electrochemical, and surface analysis techniques. Gravimetric method suggested the mitigation of corrosion in presence of GG-AMPS. Simulations were done using ABAQUS software on tubular TT-joints, which showed higher reduction in its ultimate capacity once the thickness was reduced due to corrosion. Impedance experiments emphasized the rise in charge transfer resistance with higher GG-AMPS concentration. The polarization results revealed that GG-AMPS showed cathodic predominance. Scanning electrochemical microscopy (SECM), method was used to determine the localized corrosion activity. Scanning Electron Microscopy (SEM) analysis revealed the GG-AMPS film formation.

ACS Style

Ambrish Singh; Hazem Samih Mohamed; Shivani Singh; Hua Yu; Yuanhua Lin. Corrosion inhibition using guar gum grafted 2-acrylamido-2-methylpropanesulfonic acid (GG-AMPS) in tubular steel joints. Construction and Building Materials 2020, 258, 119728 .

AMA Style

Ambrish Singh, Hazem Samih Mohamed, Shivani Singh, Hua Yu, Yuanhua Lin. Corrosion inhibition using guar gum grafted 2-acrylamido-2-methylpropanesulfonic acid (GG-AMPS) in tubular steel joints. Construction and Building Materials. 2020; 258 ():119728.

Chicago/Turabian Style

Ambrish Singh; Hazem Samih Mohamed; Shivani Singh; Hua Yu; Yuanhua Lin. 2020. "Corrosion inhibition using guar gum grafted 2-acrylamido-2-methylpropanesulfonic acid (GG-AMPS) in tubular steel joints." Construction and Building Materials 258, no. : 119728.

Journal article
Published: 03 May 2020 in Surfaces and Interfaces
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Copper nanocomposites were synthesized by complexation reaction between aqueous extracts of the waste onion peels and aqueous copper salt, characterized and investigated as corrosion inhibitor for steel in oilfield acid wash or descaling solution. Nanostructure and colloidal analyses of the nanocomposite reveal predominantly polydisperse agglomerates of particle sizes between 32 and 98 nm and average zeta potential of −36.8 mV. Composite surface was found to be rich in O and N which act as active sites that facilitate adsorption of composite on X80 steel surface and consequently protect the surface against corrosion in 1 M HCl. Corrosion process was monitored by electrochemical and weight loss techniques while corrosion products and surface protection were examined by FTIR, SEM/EDS and AFM. Addition of small amounts of CS-EX to 1 M HCl results in decreased corrosion rate, current density and surface roughness but increased charge transfer resistance and efficient corrosion protection even at high temperature. CS-EX acts as mixed type inhibitor and reduces excessive pitting damage and surface roughness due to acid corrosion by 69.2%. Novel application of CS-EX as promising efficient and cost effective alternative green anticorrosion additive for oilfield acid wash and pickling solutions has therefore been demonstrated.

ACS Style

Ekemini Ituen; Ambrish Singh; Riyun Li; Lin Yuanhua; Changyong Guo. Nanostructure, surface and anticorrosion properties of phyto-fabricated copper nanocomposite in simulated oilfield descaling fluid. Surfaces and Interfaces 2020, 19, 100514 .

AMA Style

Ekemini Ituen, Ambrish Singh, Riyun Li, Lin Yuanhua, Changyong Guo. Nanostructure, surface and anticorrosion properties of phyto-fabricated copper nanocomposite in simulated oilfield descaling fluid. Surfaces and Interfaces. 2020; 19 ():100514.

Chicago/Turabian Style

Ekemini Ituen; Ambrish Singh; Riyun Li; Lin Yuanhua; Changyong Guo. 2020. "Nanostructure, surface and anticorrosion properties of phyto-fabricated copper nanocomposite in simulated oilfield descaling fluid." Surfaces and Interfaces 19, no. : 100514.

Book chapter
Published: 01 May 2020 in Corrosion [Working Title]
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The corrosion has a considerable amount of impact on the economics of every nation, and ultimately it affects the GDP. In the present era, the challenge given by corrosion can be easily mitigated using organic compounds as corrosion inhibitor in different corrosive media. The important property of an inhibitor is the presence of the metal interacting with heteroatoms and a planar structure. In this regard, benzimidazoles (BI) with a fused bicyclic ring consisting of benzene and imidazole moiety in their structural framework making them a potential candidate for anti-corrosion work. In addition to this, bezimidazole derivatives are classified as green inhibitor due to different kinds of biological activities. Their higher potency to mitigate corrosion is because of the planar molecular structure, nitrogen atom and sp2 hybridized carbon, which provide them an ability to strongly interact with the metal. The focus of this book chapter is to investigate briefly the anti-corrosion ability of benzimidazole (BI) and their derivatives as a potential corrosion inhibitor for various industrially useful metals in different aggressive media.

ACS Style

Ambrish Singh; Kashif R. Ansari; Dheeraj S. Chauhan; Mumtaz A. Quraishi; Savas Kaya; Hua Yu; Yuanhua Lin. Corrosion Mitigation by Planar Benzimidazole Derivatives. Corrosion [Working Title] 2020, 1 .

AMA Style

Ambrish Singh, Kashif R. Ansari, Dheeraj S. Chauhan, Mumtaz A. Quraishi, Savas Kaya, Hua Yu, Yuanhua Lin. Corrosion Mitigation by Planar Benzimidazole Derivatives. Corrosion [Working Title]. 2020; ():1.

Chicago/Turabian Style

Ambrish Singh; Kashif R. Ansari; Dheeraj S. Chauhan; Mumtaz A. Quraishi; Savas Kaya; Hua Yu; Yuanhua Lin. 2020. "Corrosion Mitigation by Planar Benzimidazole Derivatives." Corrosion [Working Title] , no. : 1.

Journal article
Published: 21 April 2020 in Sustainable Chemistry and Pharmacy
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Chromeno pyrimidine (CPs) derivatives were synthesized using green approach that involves reaction of multicomponent in one pot using water as solvent. The CPs molecules were tested as potential corrosion inhibitor for N80 steel in 15% hydrochloric acid solution using standard techniques such as weight loss (WT), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP). CPs are effective corrosion inhibitors giving inhibition efficiency of 96.4% at only 200 mg/L concentration (CP-1). Adsorption of CPs with metal surface involve both physical and chemical interactions. EIS results depicted an increase in charge transfer resistance with increase in concentration of CPs. PDP study suggests mixed mode of CPs inhibition action. The adsorbed inhibitor film was confirmed by AFM and XPS spectra.

ACS Style

Ambrish Singh; K.R. Ansari; Dheeraj Singh Chauhan; M.A. Quraishi; Savaş Kaya. Anti-corrosion investigation of pyrimidine derivatives as green and sustainable corrosion inhibitor for N80 steel in highly corrosive environment: Experimental and AFM/XPS study. Sustainable Chemistry and Pharmacy 2020, 16, 100257 .

AMA Style

Ambrish Singh, K.R. Ansari, Dheeraj Singh Chauhan, M.A. Quraishi, Savaş Kaya. Anti-corrosion investigation of pyrimidine derivatives as green and sustainable corrosion inhibitor for N80 steel in highly corrosive environment: Experimental and AFM/XPS study. Sustainable Chemistry and Pharmacy. 2020; 16 ():100257.

Chicago/Turabian Style

Ambrish Singh; K.R. Ansari; Dheeraj Singh Chauhan; M.A. Quraishi; Savaş Kaya. 2020. "Anti-corrosion investigation of pyrimidine derivatives as green and sustainable corrosion inhibitor for N80 steel in highly corrosive environment: Experimental and AFM/XPS study." Sustainable Chemistry and Pharmacy 16, no. : 100257.

Journal article
Published: 10 April 2020 in Journal of Materials Research and Technology
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The ability of tobacco extracted from discarded cigarettes (NDC) to mitigate the corrosion of copper and zinc in artificial seawater was investigated using electrochemical, weight loss, and surface characterization methods. The PDP results revealed that NDC acts as a mixed type inhibitor with cathodic predominance. EIS measurements suggest that the increase in charge transfer resistance with increasing NDC concentration with maximum inhibition efficiency of 96.8% (copper) and 98.2% (zinc). Langmuir adsorption isotherm was found to be the best fit. ΔGads reveals the mixed nature of adsorption. EFMT suggest the lower current density in presence of NDC. SECM, SEM and AFM analysis reveals the NDC film formation. UV–vis spectroscopy suggest the inhibitor/metal complex formation.

ACS Style

Ambrish Singh; Xia Dayu; Ekemini Ituen; Kashif Ansari; M.A. Quraishi; Savas Kaya; Yuanhua Lin. Tobacco extracted from the discarded cigarettes as an inhibitor of copper and zinc corrosion in an ASTM standard D1141-98(2013) artificial seawater solution. Journal of Materials Research and Technology 2020, 9, 5161 -5173.

AMA Style

Ambrish Singh, Xia Dayu, Ekemini Ituen, Kashif Ansari, M.A. Quraishi, Savas Kaya, Yuanhua Lin. Tobacco extracted from the discarded cigarettes as an inhibitor of copper and zinc corrosion in an ASTM standard D1141-98(2013) artificial seawater solution. Journal of Materials Research and Technology. 2020; 9 (3):5161-5173.

Chicago/Turabian Style

Ambrish Singh; Xia Dayu; Ekemini Ituen; Kashif Ansari; M.A. Quraishi; Savas Kaya; Yuanhua Lin. 2020. "Tobacco extracted from the discarded cigarettes as an inhibitor of copper and zinc corrosion in an ASTM standard D1141-98(2013) artificial seawater solution." Journal of Materials Research and Technology 9, no. 3: 5161-5173.

Articles
Published: 11 March 2020 in Fullerenes, Nanotubes and Carbon Nanostructures
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Graphene is a radiant star in the field of nanomaterials. It has gained prominent interest since of its very good mechanical, thermal, optical and electronic possessions. The basic chemical reaction elaborate in the Hummer’s method was the oxidation of graphite, during which harmful toxic gases used to emit. Nowadays green chemistry is blossoming in the field of nanomaterial. In present work, we fabricate graphene oxide (GO) through different agricultural wastes i.e., Rice bran (RB), Sugarcane bagasse (SB), Orange peel (OP), and mixture of all these three wastes i.e., tricomposite agro waste (TAW) were mixed with ferrocene which gave electron transfer reaction to synthesized GO and compared it. At last, we concluded that particle size obtained for OPGO (23.99 nm) > graphite (17.17 nm) > SBGO (15.5 nm) > RBGO (2.235 nm) > TAWGO (1.77 nm). These green strategies are biocompatible and cost effective too. Basic information of GO crystal was obtained by X-ray diffraction (XRD) for determination of crystal structure, scanning electron microscopy (SEM) for morphological study, high resolution transmission electron spectroscopy (HRTEM) used for determine particle size, fourier transform infrared (FTIR) spectroscopy for functional group detection, thermogravametric analysis (TGA)/differential thermal analysis (DTA) for determine thermal stability of GO.

ACS Style

Ayesha Hashmi; Ajaya K. Singh; Bhawana Jain; Ambrish Singh. Muffle atmosphere promoted fabrication of graphene oxide nanoparticle by agricultural waste. Fullerenes, Nanotubes and Carbon Nanostructures 2020, 28, 627 -636.

AMA Style

Ayesha Hashmi, Ajaya K. Singh, Bhawana Jain, Ambrish Singh. Muffle atmosphere promoted fabrication of graphene oxide nanoparticle by agricultural waste. Fullerenes, Nanotubes and Carbon Nanostructures. 2020; 28 (8):627-636.

Chicago/Turabian Style

Ayesha Hashmi; Ajaya K. Singh; Bhawana Jain; Ambrish Singh. 2020. "Muffle atmosphere promoted fabrication of graphene oxide nanoparticle by agricultural waste." Fullerenes, Nanotubes and Carbon Nanostructures 28, no. 8: 627-636.

Journal article
Published: 11 March 2020 in International Journal of Hydrogen Energy
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Nanoscale nickel is prepared from ethanol extracts of Allium cepa and characterized. Zerovalent face centred cubic (fcc) nickel nanoparticles oriented mainly at Ni (111) plane formed rapidly within 30–45 min. The nanoparticles are stabilized by negative surface potential, non-agglomerated, monodispersed, round-shaped and distributed between sizes of 39.5–53.1 nm. The nanoparticles are used to simultaneously regulate the rates of hydrogen gas production and X80 steel corrosion in 1 M HCl solution for the first time. The nanoparticles efficiently inhibit hydrogen gas evolution and X80 steel corrosion rates especially at increased concentration. Inhibition efficiency increases as temperature increases from 303 to 323 K, remains fairly constant from 323 to 343 K and decreases drastically from 343 to 363 K. By means of O–H, N–H and C=C sites, the nanoparticles are spontaneously physically adsorbed on X80 steel surface and act as mixed type corrosion inhibitor with dominant influence on cathodic reaction involving hydrogen gas evolution. In the presence of the nanoparticles, surface roughness (measured by AFM) reduces by 76.0% and heights of peaks from the mean plane reduces by 58.2%. Comparatively, even 100 ppm of the nanoparticles showed higher inhibition efficiency at all temperatures than 1000 ppm concentration of the crude extract.

ACS Style

Ekemini Ituen; Ambrish Singh; Lin Yuanhua. Inhibitive effect of onion mesocarp extract-nickel nanoparticles composite on simultaneous hydrogen production and pipework corrosion in 1 M HCl. International Journal of Hydrogen Energy 2020, 45, 10814 -10825.

AMA Style

Ekemini Ituen, Ambrish Singh, Lin Yuanhua. Inhibitive effect of onion mesocarp extract-nickel nanoparticles composite on simultaneous hydrogen production and pipework corrosion in 1 M HCl. International Journal of Hydrogen Energy. 2020; 45 (18):10814-10825.

Chicago/Turabian Style

Ekemini Ituen; Ambrish Singh; Lin Yuanhua. 2020. "Inhibitive effect of onion mesocarp extract-nickel nanoparticles composite on simultaneous hydrogen production and pipework corrosion in 1 M HCl." International Journal of Hydrogen Energy 45, no. 18: 10814-10825.

Journal article
Published: 10 March 2020 in International Biodeterioration & Biodegradation
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Citrus reticulata (tangerine) peels extract was used to mediate the synthesis of copper nanoparticles (ETP-CuNPs). The product was characterized and applied as inhibitor for steel corrosion induced by 1 M HCl and Desulfovibrio sp. Round-shaped, monodisperse, non-aggregated crystals of zero-valent Cu with sizes between 54 and 72 nm were obtained. ETP-CuNPs triggered a 3-log reduction in Desulfovibio sp population at 1.96 mg/L MIC with biocorrosion inhibition efficiency of 79.8% and 68.4% at 303 K and 333 K respectively. At these temperatures, 1.0 g/L ETP-CuNPs also inhibited acid corrosion with efficiency of 95.3% and 84.6% respectively. Owing to smaller sizes, the nanoparticles more easily permeate through bacteria cell wall to alter their metabolic activities and growth than the extract. In the acid solution, ETP-CuNPs adsorb spontaneously on the steel surface via both physical and chemical mechanism using CC, O–H, C–O and N–H groups from phyto-compounds capped to Cu. Modification of the extract into nanoparticles enhanced the efficiency and better surface protection as determined by electrochemical, weight loss and surface characterization techniques. An alternative cost effective new material for simultaneous inhibition of acid and biocorrosion in the oilfield has therefore been demonstrated in this study.

ACS Style

Ekemini Ituen; Ekere Ekemini; Lin Yuanhua; Ruiyun Li; Ambrish Singh. Mitigation of microbial biodeterioration and acid corrosion of pipework steel using Citrus reticulata peels extract mediated copper nanoparticles composite. International Biodeterioration & Biodegradation 2020, 149, 104935 .

AMA Style

Ekemini Ituen, Ekere Ekemini, Lin Yuanhua, Ruiyun Li, Ambrish Singh. Mitigation of microbial biodeterioration and acid corrosion of pipework steel using Citrus reticulata peels extract mediated copper nanoparticles composite. International Biodeterioration & Biodegradation. 2020; 149 ():104935.

Chicago/Turabian Style

Ekemini Ituen; Ekere Ekemini; Lin Yuanhua; Ruiyun Li; Ambrish Singh. 2020. "Mitigation of microbial biodeterioration and acid corrosion of pipework steel using Citrus reticulata peels extract mediated copper nanoparticles composite." International Biodeterioration & Biodegradation 149, no. : 104935.

Journal article
Published: 05 March 2020 in Coatings
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Guar gum grafted 2-acrylamido-2-methylpropanesulfonic acid (GG-AMPS) was synthesized using guar gum and AMPS as the base ingredients. The corrosion inhibition of copper was studied using weight loss, electrochemical, and surface characterization methods in a 3.5% sodium chloride (NaCl) solution. Studies including weight loss were done at different acid concentrations, different inhibitor concentrations, different temperatures, and different immersion times. The weight loss studies showed the good performance of GG-AMPS at a 600 mg/L concentration. This concentration was further used as the optimum concentration for all of the studies. The efficiency decreased with the rise in temperature and at higher concentrations of acidic media. However, the efficiency of the inhibition increased with the additional immersion time. Electrochemical methods including impedance and polarization were employed to calculate the inhibition efficiency. Both of the techniques exhibited a good inhibition by GG-APMS at a 600 mg/L concentration. Surface studies were conducted using scanning electrochemical microscopy (SECM), scanning electron microscopy (SEM), and atomic force microscopy (AFM) methods. The surface studies showed smooth surfaces in the presence of GG-AMPS and rough surfaces in its absence. The adsorption type of GG-AMPS on the surface of the copper followed the Langmuir adsorption model.

ACS Style

Ambrish Singh; Mingxing Liu; Ekemini Ituen; Yuanhua Lin. Anti-Corrosive Properties of an Effective Guar Gum Grafted 2-Acrylamido-2-Methylpropanesulfonic Acid (GG-AMPS) Coating on Copper in a 3.5% NaCl Solution. Coatings 2020, 10, 241 .

AMA Style

Ambrish Singh, Mingxing Liu, Ekemini Ituen, Yuanhua Lin. Anti-Corrosive Properties of an Effective Guar Gum Grafted 2-Acrylamido-2-Methylpropanesulfonic Acid (GG-AMPS) Coating on Copper in a 3.5% NaCl Solution. Coatings. 2020; 10 (3):241.

Chicago/Turabian Style

Ambrish Singh; Mingxing Liu; Ekemini Ituen; Yuanhua Lin. 2020. "Anti-Corrosive Properties of an Effective Guar Gum Grafted 2-Acrylamido-2-Methylpropanesulfonic Acid (GG-AMPS) Coating on Copper in a 3.5% NaCl Solution." Coatings 10, no. 3: 241.

Journal article
Published: 01 February 2020 in Journal of Materials Research and Technology
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New Ni-nanocomposites were synthesized from waste onion mesocarp extracts and characterized by UV-Vis, FTIR, XRD, SEM/EDS, DLS and TEM techniques. Monodispersed non-agglomerating colloidal nanoparticles with spherical shape and particle sizes of 30–50 nm were obtained. The nanocomposites (Ni-OMNPs) exhibit O, N and CC sites which facilitated their physisorption on X80 steel surface from aqueous 1 M HCl and efficient protection of the steel surface against corrosion in the acid solution. Ni-OMNPs inhibits X80 steel corrosion in 1 M HCl with 93.99 ± 2.10 % efficiency at 30 °C and reduces surface pitting and roughness by 51.2 % and 52.3 % respectively. AFM, SEM, EDAX and FTIR techniques were used to check extent of surface protection and inhibitor-steel interaction mechanism. Compared to crude extract feedstock, Ni-OMNPs show higher corrosion inhibition and resistance to thermal and biochemical degradation. Unlike the crude extract, inhibition efficiency of Ni-OMNPs did not change considerably throughout 150 days of storage at different temperatures.

ACS Style

Ekemini Ituen; Ambrish Singh; Lin Yuanhua; Ruiyun Li. Synthesis and evaluation of anticorrosion properties of onion mesocarp-nickel nanocomposites on X80 steel in acidic cleaning solution. Journal of Materials Research and Technology 2020, 9, 2832 -2845.

AMA Style

Ekemini Ituen, Ambrish Singh, Lin Yuanhua, Ruiyun Li. Synthesis and evaluation of anticorrosion properties of onion mesocarp-nickel nanocomposites on X80 steel in acidic cleaning solution. Journal of Materials Research and Technology. 2020; 9 (3):2832-2845.

Chicago/Turabian Style

Ekemini Ituen; Ambrish Singh; Lin Yuanhua; Ruiyun Li. 2020. "Synthesis and evaluation of anticorrosion properties of onion mesocarp-nickel nanocomposites on X80 steel in acidic cleaning solution." Journal of Materials Research and Technology 9, no. 3: 2832-2845.

Journal article
Published: 29 January 2020 in Journal of Molecular Structure
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Tangerine peels extract mediated silver nanoparticles (TPE-AgNPs) were synthesized by bio-reduction of silver ions using tangerine (Citrus reticulata) peels extract and characterized using by UV–Vis, XRD, TEM, EDAX, DLS and FTIR. The obtained particles were crystalline, round-shaped, monodisperse and stable. TPE-AgNPs exhibit face centre cubic (fcc) structure in Ag0 (111) phase/orientation with dimension a = b = c = 4.0968 A∘ and α = β = γ = 90° and contain cells with volumes 72.42 × 10−6 pm3 and density (ρ) 10.19 gcm−3. TPE-AgNPs were evaluated as a new material for application as biocide and inhibitor for acid and microbial corrosion of pipeline (X80) steel in oilfield environments. TPE-AgNPs produced a 3-log reduction in microbial population (Desulfovibio sp) at 2.88 mg/L MIC and inhibited biocorrosion by 76.2% and 61.8% at 303 K and 333 K respectively. At these temperatures, 1.0 g/L TPE-AgNPs inhibited X80 steel corrosion in 1 M HCl by efficiency of 93.9% and 90.3%, respectively. Corrosion inhibition occurs by adsorption of the nanoparticles through CO, CC, C–O and O–H sites which increases charge transfer and film resistances at the steel-electrolyte interface. Complementary techniques such as FTIR, SEM/EDAX support electrochemical and weight loss results. TPE-AgNPs were more thermally stable and efficient inhibitors than the crude extract and can be deployed in oilfield for simultaneous inhibition of acid and microbial induced corrosion.

ACS Style

Ekemini Ituen; Ekere Ekemini; Lin Yuanhua; Ambrish Singh. Green synthesis of Citrus reticulata peels extract silver nanoparticles and characterization of structural, biocide and anticorrosion properties. Journal of Molecular Structure 2020, 1207, 127819 .

AMA Style

Ekemini Ituen, Ekere Ekemini, Lin Yuanhua, Ambrish Singh. Green synthesis of Citrus reticulata peels extract silver nanoparticles and characterization of structural, biocide and anticorrosion properties. Journal of Molecular Structure. 2020; 1207 ():127819.

Chicago/Turabian Style

Ekemini Ituen; Ekere Ekemini; Lin Yuanhua; Ambrish Singh. 2020. "Green synthesis of Citrus reticulata peels extract silver nanoparticles and characterization of structural, biocide and anticorrosion properties." Journal of Molecular Structure 1207, no. : 127819.

Research article
Published: 06 January 2020 in Journal of Molecular Structure
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Acidizing is the important process used in petroleum industry for oil well stimulation. Here, we are exploring the green synthesis of 4,4’-((4-methoxyphenyl)methylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ol) (PZ-1) and 4,4’-((4-nitrophenyl)methylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ol) (PZ-2) under ultrasonic irradiation and its potential application for N80 steel corrosion mitigation in 15% HCl. The corrosion inhibition investigation was performed by open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), linear polarization (LPR), potentiodynamic polarization (PDP), electrochemical frequency modulation (EFM), and electrochemical frequency modulation trend (EFMT), weight loss, scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), density functional theory (DFT) and molecular dynamics (MD). The EIS and PDP results suggests an increased impedance in presence of PZs and mixed nature of inhibitor action respectively. The protection efficiency (ɳ%) are 98.4% (PZ-1) and 94.3% (PZ-2). The results of EFMT provides the average decrease in corrosion rate and corrosion current density (icorr). The surface analysis suggests a protective layer of PZs. DFT analysis reveals that PZ-1 with lower value of ΔE acts as a better inhibitor compared to PZ-2. MD study supports a stronger binding and interaction ability of PZ-1 than PZ-2.

ACS Style

Ambrish Singh; K.R. Ansari; M.A. Quraishi; Savas Kaya. Theoretically and experimentally exploring the corrosion inhibition of N80 steel by pyrazol derivatives in simulated acidizing environment. Journal of Molecular Structure 2020, 1206, 127685 .

AMA Style

Ambrish Singh, K.R. Ansari, M.A. Quraishi, Savas Kaya. Theoretically and experimentally exploring the corrosion inhibition of N80 steel by pyrazol derivatives in simulated acidizing environment. Journal of Molecular Structure. 2020; 1206 ():127685.

Chicago/Turabian Style

Ambrish Singh; K.R. Ansari; M.A. Quraishi; Savas Kaya. 2020. "Theoretically and experimentally exploring the corrosion inhibition of N80 steel by pyrazol derivatives in simulated acidizing environment." Journal of Molecular Structure 1206, no. : 127685.

Journal article
Published: 16 December 2019 in Journal of Molecular Structure
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Mildly HCl (5%) used in formulating acid wash and descaling solution in the oilfield corrodes steel pipework especially at elevated temperatures. 5-Hydroxytryptamine (5-HTM) was tested as alternative non-toxic and eco-friendly anticorrosion additive for protection of steel in 5% HCl at different temperatures. Experimental corrosion monitoring techniques, quantum chemical calculations and molecular dynamics simulations were employed to probe corrosion inhibition, adsorption phenomenon and binding characteristics of 5-HTM to steel surface. It was observed that 5-HTM acts as mixed type inhibitor with domino effect on anodic half reaction. Addition of 5-HTM decreases corrosion current and double layer capacitance but increases charge transfer and polarization resistances. Kinetic, thermodynamic and adsorption parameters were determined and used to further explain the interaction of 5-HTM species with X80 steel surface species. Frontier molecular orbitals energies, ELUMO and EHOMO values reveal high and low electron density sites. At the atomic and molecular levels, interaction and binding energies and mechanism are predicted based on results of geometry optimization, quantum chemical calculations and molecular dynamics (MD) simulations. Some N, O and CC sites in 5-HTM are predicted as active adsorption sites from FTIR, EDS analyses and MD simulations while surface morphology is screened by SEM.

ACS Style

Ekemini Ituen; Victor Mkpenie; Lin Yuanhua; Ambrish Singh. Inhibition of erosion corrosion of pipework steel in descaling solution using 5-hydroxytryptamine-based additives: Empirical and computational studies. Journal of Molecular Structure 2019, 1204, 127562 .

AMA Style

Ekemini Ituen, Victor Mkpenie, Lin Yuanhua, Ambrish Singh. Inhibition of erosion corrosion of pipework steel in descaling solution using 5-hydroxytryptamine-based additives: Empirical and computational studies. Journal of Molecular Structure. 2019; 1204 ():127562.

Chicago/Turabian Style

Ekemini Ituen; Victor Mkpenie; Lin Yuanhua; Ambrish Singh. 2019. "Inhibition of erosion corrosion of pipework steel in descaling solution using 5-hydroxytryptamine-based additives: Empirical and computational studies." Journal of Molecular Structure 1204, no. : 127562.

Journal article
Published: 14 December 2019 in International Journal of Biological Macromolecules
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An eco-friendly Schiff base, namely Salicylaldeyde-Chitosan Schiff Base (SCSB), was synthesized by the reaction of chitosan and salicylaldehyde. In 3.5% NaCl saturated with carbon dioxide at 65 °C corrosion inhibition effect was analyzed using weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) methods. The PDP results revealed that SCSB acts as a mixed type inhibitor and reduces the corrosion process effectively at 150 mg L−1 concentration with an inhibition efficiency of 95.2% and corrosion rate of 0.444 mm/y. EIS measurements suggest that the corrosion inhibition process is kinetically controlled. Langmuir adsorption model is the best fit among the other tested isotherms. The surface analysis was carried out using scanning electron microscopy (SEM), atomic force microscopy (AFM), scanning Kelvin probe (SKP), and X-ray photoelectron spectroscopy (XPS) to corroborate the formation of inhibitor film on the metal surface. Computational studies showed the effective adsorption of the protonated form of inhibitor.

ACS Style

K.R. Ansari; Dheeraj Singh Chauhan; M.A. Quraishi; Mohammad A.J. Mazumder; Ambrish Singh. Chitosan Schiff base: an environmentally benign biological macromolecule as a new corrosion inhibitor for oil & gas industries. International Journal of Biological Macromolecules 2019, 144, 305 -315.

AMA Style

K.R. Ansari, Dheeraj Singh Chauhan, M.A. Quraishi, Mohammad A.J. Mazumder, Ambrish Singh. Chitosan Schiff base: an environmentally benign biological macromolecule as a new corrosion inhibitor for oil & gas industries. International Journal of Biological Macromolecules. 2019; 144 ():305-315.

Chicago/Turabian Style

K.R. Ansari; Dheeraj Singh Chauhan; M.A. Quraishi; Mohammad A.J. Mazumder; Ambrish Singh. 2019. "Chitosan Schiff base: an environmentally benign biological macromolecule as a new corrosion inhibitor for oil & gas industries." International Journal of Biological Macromolecules 144, no. : 305-315.

Journal article
Published: 01 December 2019 in International Journal of Electrochemical Science
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ACS Style

Ambrish Singh. Extract of Angelica sinensis as oilfield corrosion inhibitor for mild steel in H2SO4 media. International Journal of Electrochemical Science 2019, 11122 -11137.

AMA Style

Ambrish Singh. Extract of Angelica sinensis as oilfield corrosion inhibitor for mild steel in H2SO4 media. International Journal of Electrochemical Science. 2019; ():11122-11137.

Chicago/Turabian Style

Ambrish Singh. 2019. "Extract of Angelica sinensis as oilfield corrosion inhibitor for mild steel in H2SO4 media." International Journal of Electrochemical Science , no. : 11122-11137.

Journal article
Published: 18 October 2019 in Journal of Colloid and Interface Science
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In the present time, there is enormous need for environmentally friendly and effective corrosion inhibitor for the acidizing process. During acidization 15% hydrochloric acid is used, which causes corrosion of N80 steel. The present study aims at the synthesis of environmentally benign corrosion inhibitor, namely 2-amino-4-(5-hydroxy-3-methyl-1H-pyrazole-4-yl)-4H-chromene-3-carbonitrile (PCP), and corrosion inhibition evaluation for N80 steel in 15% HCl. The inhibition potential of PCP was examined by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), density functional theory (DFT), and molecular dynamics simulation (MSD). The surface morphology of N80 steel samples was characterized by atomic force microscopy (AFM), contact angle measurement, UV–vis spectroscopy, and scanning electron microscopy (SEM). The EIS measurements disclosed that PCP inhibits corrosion via kinetic controlled process. PDP results confirmed that PCP is a mixed type inhibitor and reduces the corrosion process effectively at 400 mg/L concentration with 98.4% efficiency. The adsorption of PCP followed Langmuir isotherm. Surface analysis by SEM, AFM, contact angle measurement, and UV–vis spectroscopy supports PCP adsorption over the N80 steel surface. The DFT study explores the adsorption and reactive regions of the PCP molecules. The MSD reveals that the diffusion co-efficient of the corrosive species in inhibited solution is less as compared to uninhibited.

ACS Style

Ambrish Singh; K.R. Ansari; Dheeraj Singh Chauhan; M.A. Quraishi; Hassane Lgaz; Ill-Min Chung. Comprehensive investigation of steel corrosion inhibition at macro/micro level by ecofriendly green corrosion inhibitor in 15% HCl medium. Journal of Colloid and Interface Science 2019, 560, 225 -236.

AMA Style

Ambrish Singh, K.R. Ansari, Dheeraj Singh Chauhan, M.A. Quraishi, Hassane Lgaz, Ill-Min Chung. Comprehensive investigation of steel corrosion inhibition at macro/micro level by ecofriendly green corrosion inhibitor in 15% HCl medium. Journal of Colloid and Interface Science. 2019; 560 ():225-236.

Chicago/Turabian Style

Ambrish Singh; K.R. Ansari; Dheeraj Singh Chauhan; M.A. Quraishi; Hassane Lgaz; Ill-Min Chung. 2019. "Comprehensive investigation of steel corrosion inhibition at macro/micro level by ecofriendly green corrosion inhibitor in 15% HCl medium." Journal of Colloid and Interface Science 560, no. : 225-236.

Paper
Published: 19 September 2019 in New Journal of Chemistry
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The present paper deals with the investigation of two synthesized benzimidazole derivatives (BZs) as corrosion inhibitors for N80 steel under static conditions in a 15% HCl corrosive environment and in the temperature range of 30 to 90 °C.

ACS Style

Yang Yaocheng; Yin Caihong; Ambrish Singh; Yuanhua Lin. Electrochemical study of commercial and synthesized green corrosion inhibitors for N80 steel in acidic liquid. New Journal of Chemistry 2019, 43, 16058 -16070.

AMA Style

Yang Yaocheng, Yin Caihong, Ambrish Singh, Yuanhua Lin. Electrochemical study of commercial and synthesized green corrosion inhibitors for N80 steel in acidic liquid. New Journal of Chemistry. 2019; 43 (40):16058-16070.

Chicago/Turabian Style

Yang Yaocheng; Yin Caihong; Ambrish Singh; Yuanhua Lin. 2019. "Electrochemical study of commercial and synthesized green corrosion inhibitors for N80 steel in acidic liquid." New Journal of Chemistry 43, no. 40: 16058-16070.