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The novel coronavirus disease (COVID-19) pandemic outbreak is the most startling public health crises with attendant global socio-economic burden ever experienced in the twenty-first century. The level of devastation by this outbreak is such that highly impacted countries will take years to recover. Studies have shown that timely detection based on accelerated sample testing and accurate diagnosis are crucial steps to reducing or preventing the spread of any pandemic outbreak. In this opinionated review, the impacts of metal organic frameworks (MOFs) as a biosensor in a pandemic outbreak is investigated with reference to COVID-19. Biosensing technologies have been proven to be very effective in clinical analyses, especially in assessment of severe infectious diseases. Polymerase chain reactions (PCR, RT-PCR, CRISPR) - based test methods predominantly used for SARS-COV-2 diagnoses have serious limitations and the health scientists and researchers are urged to come up with a more robust and versatile system for solving diagnostic problem associated with the current and future pandemic outbreaks. MOFs, an emerging crystalline material with unique characteristics will serve as promising biosensing materials in a pandemic outbreak such as the one we are in. We hereby highlight the characteristics of MOFs and their sensing applications, potentials as biosensors in a pandemic outbreak and draw the attention of researchers to a new vista of research that needs immediate action.
Godwin A. Udourioh; Moses M. Solomon; Emmanuel I. Epelle. Metal Organic Frameworks as Biosensing Materials for COVID-19. Cellular and Molecular Bioengineering 2021, 1 -19.
AMA StyleGodwin A. Udourioh, Moses M. Solomon, Emmanuel I. Epelle. Metal Organic Frameworks as Biosensing Materials for COVID-19. Cellular and Molecular Bioengineering. 2021; ():1-19.
Chicago/Turabian StyleGodwin A. Udourioh; Moses M. Solomon; Emmanuel I. Epelle. 2021. "Metal Organic Frameworks as Biosensing Materials for COVID-19." Cellular and Molecular Bioengineering , no. : 1-19.
The influence of cryogenic and cryogenic time (10, 24, 36, 48, and 72 h) on the hardness, surface roughness, and corrosion resistance properties of AA5083-H111 alloy in 3.5 wt.% NaCl solution have been investigated. The hardness property was analysed via the Brinell hardness measurement, the corrosion resistance property was measured electrochemically, while the morphological studies were undertaken using the SEM (scanning electron microscopy) and atomic force microscopy (AFM). The results disclose that the shallow cryogenic treatment at −80°C improves the alloy's hardness, surface roughness, and the corrosion resistance. The best cryogenic treatment time is 24 h. Cryogenic treatment for 24 h increases the alloy's hardness from 71.3 HB to 74.90 HB, reduces the average surface roughness from 534.000 nm to 105.634 nm, and increases the total charge transfer resistance from 18139 Ω cm2 to 26230 Ω cm2. The improvement is linked to settling of fine particles on the alloy surface. The SEM results support these claims.
Dogancan Uz; Moses M Solomon; Husnu Gerengi; Mukerrem Sahin; Mesut Yıldız. Shallow cryogenic treatment: effect on the corrosion resistance and hardness properties of AA5083-H111 alloy in chloride-ions enriched medium. Materials Research Express 2021, 8, 076516 .
AMA StyleDogancan Uz, Moses M Solomon, Husnu Gerengi, Mukerrem Sahin, Mesut Yıldız. Shallow cryogenic treatment: effect on the corrosion resistance and hardness properties of AA5083-H111 alloy in chloride-ions enriched medium. Materials Research Express. 2021; 8 (7):076516.
Chicago/Turabian StyleDogancan Uz; Moses M Solomon; Husnu Gerengi; Mukerrem Sahin; Mesut Yıldız. 2021. "Shallow cryogenic treatment: effect on the corrosion resistance and hardness properties of AA5083-H111 alloy in chloride-ions enriched medium." Materials Research Express 8, no. 7: 076516.
The quest to replace toxic chemicals in the nearest future is revolutionizing the corrosion inhibitor research world by turning its attention to plant biomaterials. Herein, we report the corrosion inhibiting potential of butanolic extract of date palm leaves (BUT) on the corrosion of API 5L X60 carbon steel in 15 wt.% HCl solution. The mass loss, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), linear polarization (LPR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX), and atomic force microscopy (AFM) techniques were employed in the investigation. We also report the effect of intensifier additives, namely formic acid (FA), potassium iodide (KI), and zinc nitrate (Zn(NO3)2) as well as temperature on the corrosion inhibiting performance of BUT. BUT exhibits inhibiting ability but the extent of inhibition is dependent on concentration, temperature, and intensifiers’ concentration. At 25 °C, 200 mg/L BUT and 700 mg/L BUT protected the carbon steel surface by 50% and 88%, respectively. The addition of 3 mM FA and 5 mM KI to 200 mg/L upgraded the extract performance to 97% and 95%, respectively. Zn(NO3)2 performs poorly as an intensifier for BUT under acidizing conditions. The adsorption of BUT + FA and BUT + KI is synergistic in nature whereas that of BUT + Zn(NO3)2 drifts towards antagonistic behavior according to the calculated synergism parameter. Increase in the system temperature resulted in a slight decline in the inhibition efficiency of BUT + FA and BUT + KI but with efficiency of above 85% achieved at 60 °C. The SEM and AFM results corroborate results from the electrochemical techniques.
Saviour Umoren; Moses Solomon; Ime Obot; Rami Suleiman. Effect of Intensifier Additives on the Performance of Butanolic Extract of Date Palm Leaves against the Corrosion of API 5L X60 Carbon Steel in 15 wt.% HCl Solution. Sustainability 2021, 13, 5569 .
AMA StyleSaviour Umoren, Moses Solomon, Ime Obot, Rami Suleiman. Effect of Intensifier Additives on the Performance of Butanolic Extract of Date Palm Leaves against the Corrosion of API 5L X60 Carbon Steel in 15 wt.% HCl Solution. Sustainability. 2021; 13 (10):5569.
Chicago/Turabian StyleSaviour Umoren; Moses Solomon; Ime Obot; Rami Suleiman. 2021. "Effect of Intensifier Additives on the Performance of Butanolic Extract of Date Palm Leaves against the Corrosion of API 5L X60 Carbon Steel in 15 wt.% HCl Solution." Sustainability 13, no. 10: 5569.
Benzimidazole derivatives are emerging as promising corrosion inhibitors for oil and gas application because they exhibit high efficiency and very good environmental profile. Although long alkyl and phenyl chains enhance their efficiency, they also increase their toxicity. Finding benzimidazole derivatives devoid of long hydrocarbon chains and with lower toxicity has become a priority. 2–(chloromethyl)benzimidazole (CMB), with log Po/w = 2.2, has been investigated as a promising low-toxic sweet corrosion inhibitor for C1018 carbon steel in CO2–saturated NaCl solution under static condition using experimental and theoretical approaches. At 25 °C, Open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PDP) techniques confirm that CMB is an anodic-type sweet corrosion inhibitor which is able to form a protective layer on the steel surface and provide inhibition efficiency of 97.54% at 10 ppm. The efficiency increased to 98.40% and 98.58% upon increasing the temperature to 40 °C and 60 °C, respectively but decreased to 96.32% and 94.76% as the salt concentration was raised to 5.0% and 7.0% NaCl, respectively. The latter was attributed to the antagonistic competition between Cl– ions and CMB for anodic adsorption. The CMB–steel interaction is facilitated by the free electrons around N heteroatoms and C = C bonds, based on FTIR analysis and computational calculations. This eventually ameliorates the surface degradation of the steel during the sweet corrosion at 25 and 60 °C. CMB performance is highly comparable with reported sweet corrosion inhibitors with higher toxicity values.
Moses M. Solomon; Ikenna B. Onyeachu; Demian I. Njoku; Simeon C. Nwanonenyi; Emeka E. Oguzie. Adsorption and corrosion inhibition characteristics of 2–(chloromethyl)benzimidazole for C1018 carbon steel in a typical sweet corrosion environment: Effect of chloride ion concentration and temperature. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2020, 610, 125638 .
AMA StyleMoses M. Solomon, Ikenna B. Onyeachu, Demian I. Njoku, Simeon C. Nwanonenyi, Emeka E. Oguzie. Adsorption and corrosion inhibition characteristics of 2–(chloromethyl)benzimidazole for C1018 carbon steel in a typical sweet corrosion environment: Effect of chloride ion concentration and temperature. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2020; 610 ():125638.
Chicago/Turabian StyleMoses M. Solomon; Ikenna B. Onyeachu; Demian I. Njoku; Simeon C. Nwanonenyi; Emeka E. Oguzie. 2020. "Adsorption and corrosion inhibition characteristics of 2–(chloromethyl)benzimidazole for C1018 carbon steel in a typical sweet corrosion environment: Effect of chloride ion concentration and temperature." Colloids and Surfaces A: Physicochemical and Engineering Aspects 610, no. : 125638.
N1,N1-diallyl-N6,N6,N6-tripropylhexane-1,6-diaminium chloride (NDTHDC) and its polymer poly(N1,N1-diallyl-N6,N6,N6-tripropylhexane-1,6-diaminium chloride) (poly-NDTHDC) were synthesized and tested against API X60 carbon steel corrosion in 15 wt % HCl solution. Weight loss, electrochemical, and surface analysis techniques were used. Results show that poly-NDTHDC is better than NDTHDC. Moreover, 1000 mg/L NDTHDC protected the studied surface by 79.1% at 25 °C, while 100 mg/L poly-NDTHDC afforded 86.1% protection. Inhibition efficiency increases with temperature (up to 60 °C) but depreciates thereafter. NDTHDC and poly-NDTHDC perform better under the hydrodynamic condition than the static condition. TGA and FTIR results reveal that poly-NDTHDC is chemically and thermally stable.
Nurudeen A. Odewunmi; Moses M. Solomon; Saviour A. Umoren; Shaikh A. Ali. Comparative Studies of the Corrosion Inhibition Efficacy of a Dicationic Monomer and Its Polymer against API X60 Steel Corrosion in Simulated Acidizing Fluid under Static and Hydrodynamic Conditions. ACS Omega 2020, 5, 27057 -27071.
AMA StyleNurudeen A. Odewunmi, Moses M. Solomon, Saviour A. Umoren, Shaikh A. Ali. Comparative Studies of the Corrosion Inhibition Efficacy of a Dicationic Monomer and Its Polymer against API X60 Steel Corrosion in Simulated Acidizing Fluid under Static and Hydrodynamic Conditions. ACS Omega. 2020; 5 (42):27057-27071.
Chicago/Turabian StyleNurudeen A. Odewunmi; Moses M. Solomon; Saviour A. Umoren; Shaikh A. Ali. 2020. "Comparative Studies of the Corrosion Inhibition Efficacy of a Dicationic Monomer and Its Polymer against API X60 Steel Corrosion in Simulated Acidizing Fluid under Static and Hydrodynamic Conditions." ACS Omega 5, no. 42: 27057-27071.
In this study, Kola nut extract (KE) was evaluated for inhibiting ability towards low carbon steel corrosion in 1 M HCl solution using weight loss and electrochemical techniques. The surface of the corroded carbon steel was examined by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM). Elemental composition of the corrosion products and/or adsorbed inhibitor film on the carbon steel surface was determined with the aid of an energy-dispersive X-ray spectroscopy (EDX). The ultraviolet-visible (UV-vis) experiments were also performed to get information about the interaction of KE with the carbon steel surface. It was found that KE exhibited good corrosion protection property. From weight loss technique, corrosion rate was reduced from 0.387 to 0.054 mm/year by 700 ppm of KE at room temperature after 24 h immersion and this corresponded to inhibition efficiency (IE) of 86%. The IE however depreciated with rise in temperature. FTIR results reveal that KE interacted with the carbon steel surface through the O and N heteroatoms of its phytoconstituents. FTIR spectroscopy, UV-vis, SEM, AFM, and EDX data provided proof of KE adsorption on the steel surface as reason for the corrosion inhibition.
Abdul-Rashid I. Mohammed; Moses M. Solomon; Kabiru Haruna; Saviour A. Umoren; Tawfik A. Saleh. Evaluation of the corrosion inhibition efficacy of Cola acuminata extract for low carbon steel in simulated acid pickling environment. Environmental Science and Pollution Research 2020, 27, 34270 -34288.
AMA StyleAbdul-Rashid I. Mohammed, Moses M. Solomon, Kabiru Haruna, Saviour A. Umoren, Tawfik A. Saleh. Evaluation of the corrosion inhibition efficacy of Cola acuminata extract for low carbon steel in simulated acid pickling environment. Environmental Science and Pollution Research. 2020; 27 (27):34270-34288.
Chicago/Turabian StyleAbdul-Rashid I. Mohammed; Moses M. Solomon; Kabiru Haruna; Saviour A. Umoren; Tawfik A. Saleh. 2020. "Evaluation of the corrosion inhibition efficacy of Cola acuminata extract for low carbon steel in simulated acid pickling environment." Environmental Science and Pollution Research 27, no. 27: 34270-34288.
A novel corrosion inhibitor, ((E)-1,5-dimethyl-4-((1-(3-nitrophenyl)ethylidene)amino)-2-phenyl-1,2-dihydro-3H-pyrazol-3-one) (DNPP) was synthesized in high yield by the condensation reaction of 4-aminoantipyrine with 2-nitroacetphenone derived from acetophenone as a starting material and characterized by FT-IR, 1H, and 13C NMR techniques. DNPP was tested against the corrosion of SAE 1012 carbon steel in 15 wt.% HCl solution using electrochemical and surface characterization techniques. Results obtained show that DNPP is effective in retarding the corrosion of SAE 1012 carbon steel. With 4 mM of DNPP, the charge transfer resistance of SAE 1012 in 15 wt.% HCl solution is raised from 17.42 to 140.50 Ω cm2 and the substrate surface is protected by 87%. The inhibition is through adsorption mechanism (mixed-adsorption type) and has been confirmed by SEM and EDAX results. Potentiodynamic polarization results reveal that DNPP acted as a mixed-type corrosion inhibitor. DNPP is a promising candidate for the formulation of an inhibitor cocktail for the strong acid environment.
Husnu Gerengi; Resit Cakmak; Besir Dag; Moses M. Solomon; Hatice Aslıhan Akbal Tuysuz; Ertugrul Kaya. Synthesis and anticorrosion studies of 4-[(2-nitroacetophenonylidene)-amino]-antipyrine on SAE 1012 carbon steel in 15 wt.% HCl solution. Journal of Adhesion Science and Technology 2020, 34, 2448 -2466.
AMA StyleHusnu Gerengi, Resit Cakmak, Besir Dag, Moses M. Solomon, Hatice Aslıhan Akbal Tuysuz, Ertugrul Kaya. Synthesis and anticorrosion studies of 4-[(2-nitroacetophenonylidene)-amino]-antipyrine on SAE 1012 carbon steel in 15 wt.% HCl solution. Journal of Adhesion Science and Technology. 2020; 34 (22):2448-2466.
Chicago/Turabian StyleHusnu Gerengi; Resit Cakmak; Besir Dag; Moses M. Solomon; Hatice Aslıhan Akbal Tuysuz; Ertugrul Kaya. 2020. "Synthesis and anticorrosion studies of 4-[(2-nitroacetophenonylidene)-amino]-antipyrine on SAE 1012 carbon steel in 15 wt.% HCl solution." Journal of Adhesion Science and Technology 34, no. 22: 2448-2466.
Chitosan/silver nanofluids were prepared using Phoenix dactylifera (DPLE) or Rumex vesicarius (HEL) extracts as the reducing agent, characterized using Fourier-transform infrared spectroscopy (FTIR), ultraviolet–visible (UV-vis), X-ray diffraction (XRD), and transmission electron microscope (TEM). The antimicrobial effect of the nanofluids against Gram positive, Bacillus licheniformis, Staphylococcus haemolyticus, Bacillus cereus, and Micrococcus luteus, and Gram-negative Pseudomonas aeruginosa, Pseudomonas citronellolis, and Escherichia coli bacteria has been studied. The nanoparticles were polydispersed in the chitosan matrix and are highly stable. The zeta potential of the silver nanoparticles in DPLE- and HEL-mediated composites is +46 mV and +56 mV, respectively. The FTIR results reveal that the free carboxylate groups in the plant biomaterial took part in stabilization process. HEL is a stronger reducing agent than DPLE and nanoparticles generated with HEL are smaller (8.0–36 nm) than those produced with DPLE (10–43 nm). DPLE- and HEL-mediated composites effectively inhibit the growth of the studied bacteria but HEL-mediated composite exhibited higher effect. The higher antimicrobial activity of HEL-mediated composite is linked to the smaller nanoparticles. The foregoing results indicate that HEL extract can be used in the green production of potential antimicrobial chitosan/silver nanofluids for biomedical and packaging applications.
Saviour A. Umoren; Moses M. Solomon; Alexis Nzila; Ime B. Obot. Preparation of Silver/Chitosan Nanofluids Using Selected Plant Extracts: Characterization and Antimicrobial Studies against Gram-Positive and Gram-Negative Bacteria. Materials 2020, 13, 1629 .
AMA StyleSaviour A. Umoren, Moses M. Solomon, Alexis Nzila, Ime B. Obot. Preparation of Silver/Chitosan Nanofluids Using Selected Plant Extracts: Characterization and Antimicrobial Studies against Gram-Positive and Gram-Negative Bacteria. Materials. 2020; 13 (7):1629.
Chicago/Turabian StyleSaviour A. Umoren; Moses M. Solomon; Alexis Nzila; Ime B. Obot. 2020. "Preparation of Silver/Chitosan Nanofluids Using Selected Plant Extracts: Characterization and Antimicrobial Studies against Gram-Positive and Gram-Negative Bacteria." Materials 13, no. 7: 1629.
A benzimidazole derivative, 2-(2-bromophenyl)-1-methyl-1H-benzimidazole (2BPB) has been studied as a corrosion inhibitor for Cu-Ni 70/30 and 90/10 alloys in 1 mol/dm3 HCl solution at low and high temperatures using the weight loss, electrochemical (potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), & cyclic voltammetry (CV)), and surface characterization (scanning electron microscopy (SEM) & Fourier-transform infrared spectroscopy (FTIR)) techniques. The effect of immersion time (up to 72 h) and addition of iodide ions on the inhibition efficiency of 2BPB have also been investigated. At low temperature, 1.0 g/L 2BPB inhibits Cu-Ni 70/30 and 90/10 alloys by 88.9 ± 4.8% and 57.5 ± 1.3%, respectively. The performance of 2BPB improves with increase in immersion time and addition of iodide ions but slightly depreciates with rise in temperature. 2BPB acts as a mixed type corrosion inhibitor and adsorbs on the alloys surfaces through physical adsorption mechanism. SEM and FTIR results confirm the adsorption of 2BPB on the alloys surfaces. 2BPB is a potential low toxic candidate for the formulation of acid corrosion inhibitor for Cu-Ni alloys.
Ikenna B. Onyeachu; Moses M. Solomon; Saviour A. Umoren; Ime B. Obot; Ahmad A. Sorour. Corrosion inhibition effect of a benzimidazole derivative on heat exchanger tubing materials during acid cleaning of multistage flash desalination plants. Desalination 2019, 479, 114283 .
AMA StyleIkenna B. Onyeachu, Moses M. Solomon, Saviour A. Umoren, Ime B. Obot, Ahmad A. Sorour. Corrosion inhibition effect of a benzimidazole derivative on heat exchanger tubing materials during acid cleaning of multistage flash desalination plants. Desalination. 2019; 479 ():114283.
Chicago/Turabian StyleIkenna B. Onyeachu; Moses M. Solomon; Saviour A. Umoren; Ime B. Obot; Ahmad A. Sorour. 2019. "Corrosion inhibition effect of a benzimidazole derivative on heat exchanger tubing materials during acid cleaning of multistage flash desalination plants." Desalination 479, no. : 114283.
An imidazoline, 2-heptadecyl-1-[2-(octadecanoylamino)ethyl]-2- imidazoline (QSI) with -C17H35 as the tail chain length was synthesized, characterized, and studied as corrosion inhibitor for low carbon steel in 15% HCl solution under static and hydrodynamic conditions. Influence of addition of KI, temperature, and chain length of pendant hydrocarbon on inhibition efficiency (η) was also examined. It is found that, QSI exhibits a mixed type behavior but fairly inhibited the corrosion of low carbon steel in the studied medium. The maximum concentration studied (400 mg/L) afforded η of <50%. Addition of KI to QSI synergistically enhanced the corrosion inhibition performance of QSI, upgrading the η to approximately 90%. Increase in the system temperature increases the η of both QSI and QSI + KI. From the variation of η with temperature and the calculated corrosion kinetic parameters, chemical adsorption is proposed as the adsorption mechanism of the additives. QSI performs better under hydrodynamic condition than static condition. However, the corrosion resistance of the metal decreases at rotation speed higher than 1000 rpm. Inhibition efficiency of imidazoline decreases as the length of the hydrocarbon pendant chain increases. Imidazoline compounds with -C13H27 and -C15H31 as the length of the pendant group hydrocarbon perform better than QSI with -C17H35.
Moses M. Solomon; Saviour A. Umoren; Mumtaz A. Quraishi; Divya B. Tripathy; Ekaette J. Abai. Effect of akyl chain length, flow, and temperature on the corrosion inhibition of carbon steel in a simulated acidizing environment by an imidazoline-based inhibitor. Journal of Petroleum Science and Engineering 2019, 187, 106801 .
AMA StyleMoses M. Solomon, Saviour A. Umoren, Mumtaz A. Quraishi, Divya B. Tripathy, Ekaette J. Abai. Effect of akyl chain length, flow, and temperature on the corrosion inhibition of carbon steel in a simulated acidizing environment by an imidazoline-based inhibitor. Journal of Petroleum Science and Engineering. 2019; 187 ():106801.
Chicago/Turabian StyleMoses M. Solomon; Saviour A. Umoren; Mumtaz A. Quraishi; Divya B. Tripathy; Ekaette J. Abai. 2019. "Effect of akyl chain length, flow, and temperature on the corrosion inhibition of carbon steel in a simulated acidizing environment by an imidazoline-based inhibitor." Journal of Petroleum Science and Engineering 187, no. : 106801.
Seven natural polymers namely, chitosan (CHI), dextran (Dex), carboxymethyl cellulose (CMC), sodium alginate (ALG), pectin (PEC), hydroxylethyl cellulose (HEC), and Gum Arabic (GA) were screened for anticorrosion property towards AZ31 Mg alloy in 3.5 wt.% NaCl solution. CHI, Dex, CMC, PEC, and GA accelerated the corrosion while ALG and HEC moderately inhibited the corrosion of the alloy. HEC and ALG (1 g/L) protected the alloy by 64.13 % and 58.27 %, respectively. Two inhibitor cocktails consisting of either HEC or ALG, KI, and Date palm seed oil have been formulated. HEC- and ALG-formulations inhibited the alloy corrosion by 80.56 % and 77.43 %, respectively from EIS technique. Surface observation studies using SECM, AFM, SEM, and EDX agreed with other experimental results revealing effective corrosion inhibition by the formulations. X-ray photoelectron spectroscopy, FTIR, and UV–vis results disclose that Mg(OH)2 co-existed with adsorbed inhibitor complexes.
Saviour A. Umoren; Moses M. Solomon; A. Madhankumar; Ime B. Obot. Exploration of natural polymers for use as green corrosion inhibitors for AZ31 magnesium alloy in saline environment. Carbohydrate Polymers 2019, 230, 115466 .
AMA StyleSaviour A. Umoren, Moses M. Solomon, A. Madhankumar, Ime B. Obot. Exploration of natural polymers for use as green corrosion inhibitors for AZ31 magnesium alloy in saline environment. Carbohydrate Polymers. 2019; 230 ():115466.
Chicago/Turabian StyleSaviour A. Umoren; Moses M. Solomon; A. Madhankumar; Ime B. Obot. 2019. "Exploration of natural polymers for use as green corrosion inhibitors for AZ31 magnesium alloy in saline environment." Carbohydrate Polymers 230, no. : 115466.
The crude extract of Pterocarpus santalinoides leaves (PSLE) extracted using water, ethanol, and methanol as the extraction solvent has been studied as inhibitor for low carbon steel in 1 moL/dm3 HCl solution using electrochemical approaches at 25 °C and 60 °C. The results obtained reveal that, PSLE extract has the capacity to effectively suppress the dissolution of the studied substrate. The inhibition performance of PSLE is a function of concentration, temperature, and extraction solvent. Corrosion inhibition is in the order: ethanolic extract > methanolic extract > aqueous extract. With 0.7 g/L PSLE, inhibition efficiency of >90% has been obtained at 60 °C. Based on calculated values of adsorption parameters and UV–vis results, it is proposed that PSLE molecules chemically interacted with the substrate surface. PSLE extract suppressed both the rate of cathodic and anodic reactions according to the PDP results. However, aqueous PSLE extract inhibited anodic corrosion reactions predominantly while ethanolic and methanolic extracts mainly inhibited the cathodic corrosion reactions. Surface characterization studies via SEM, EDAX, and AFM provide experimental evidence to the claim of interaction and presence of PSLE molecules on the studied substrate surface.
Cornelius C. Ahanotu; Ikenna B. Onyeachu; Moses M. Solomon; Ikechukwu S. Chikwe; Oluchukwu B. Chikwe; Chinenye A. Eziukwu. Pterocarpus santalinoides leaves extract as a sustainable and potent inhibitor for low carbon steel in a simulated pickling medium. Sustainable Chemistry and Pharmacy 2019, 15, 100196 .
AMA StyleCornelius C. Ahanotu, Ikenna B. Onyeachu, Moses M. Solomon, Ikechukwu S. Chikwe, Oluchukwu B. Chikwe, Chinenye A. Eziukwu. Pterocarpus santalinoides leaves extract as a sustainable and potent inhibitor for low carbon steel in a simulated pickling medium. Sustainable Chemistry and Pharmacy. 2019; 15 ():100196.
Chicago/Turabian StyleCornelius C. Ahanotu; Ikenna B. Onyeachu; Moses M. Solomon; Ikechukwu S. Chikwe; Oluchukwu B. Chikwe; Chinenye A. Eziukwu. 2019. "Pterocarpus santalinoides leaves extract as a sustainable and potent inhibitor for low carbon steel in a simulated pickling medium." Sustainable Chemistry and Pharmacy 15, no. : 100196.
Mouheddin T. Alhaffar; Saviour A. Umoren; Ime B. Obot; Shaikh A. Ali; Moses M. Solomon. Studies of the anticorrosion property of a newly synthesized Green isoxazolidine for API 5L X60 steel in acid environment. Journal of Materials Research and Technology 2019, 8, 4399 -4416.
AMA StyleMouheddin T. Alhaffar, Saviour A. Umoren, Ime B. Obot, Shaikh A. Ali, Moses M. Solomon. Studies of the anticorrosion property of a newly synthesized Green isoxazolidine for API 5L X60 steel in acid environment. Journal of Materials Research and Technology. 2019; 8 (5):4399-4416.
Chicago/Turabian StyleMouheddin T. Alhaffar; Saviour A. Umoren; Ime B. Obot; Shaikh A. Ali; Moses M. Solomon. 2019. "Studies of the anticorrosion property of a newly synthesized Green isoxazolidine for API 5L X60 steel in acid environment." Journal of Materials Research and Technology 8, no. 5: 4399-4416.
A novel random copolymer 4, containing diallylmethylamine and N1,N1-diallyl-N1-methyl-N6,N6,N6-tripropylhexane-1,6-diammonium dibromide units in a 1:1 ratio (polymer 4) was synthesized via Butler's cyclopolymerization technique. Characterization was accomplished by 1H NMR, elemental analysis, and Fourier-transform infrared spectroscopy (FTIR). Polymer 4 was tested as corrosion inhibitor for low carbon steel in 15% HCl solution via gravimetric and electrochemical approaches. The analysis of the metal specimen surfaces was done using scanning electron microscope (SEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDAX), and X-ray photoelectron spectroscopy (XPS) methods. Polymer 4 is inhibitor for the substrate particularly at elevated temperatures. Corrosion mitigation is by chemisorption mechanism and can be best described with the Langmuir and El-Awady et al. kinetic-thermodynamic adsorption isotherms. Polymer 4 corrosion mitigation capacity can be improved by the addition of a minute amount of I- ions. Inhibition efficiency of 92.99% has been achieved with 500 ppm polymer 4 + 1 mM KI mixture at 25 °C. Surface analysis results support the claim of adsorption of additive molecules on steel surface. From XPS results, corrosion products on steel surface exposed to the free acid solution are mixtures of chlorides, carbonates, oxides, and hydroxides. In polymer 4 + KI system, polymer 4 molecules are adsorbed on triiodide and pentaiodide ions layer. The improved corrosion inhibition of polymer 4 by I- ions is synergistic in nature according to calculated synergism parameter. Polymer 4 is a promising corrosion inhibitor for oil well acidizing purpose.
Saviour A. Umoren; Moses Solomon; Shaikh A. Ali; Hatim D.M. Dafalla. Synthesis, characterization, and utilization of a diallylmethylamine-based cyclopolymer for corrosion mitigation in simulated acidizing environment. Materials Science and Engineering: C 2019, 100, 897 -914.
AMA StyleSaviour A. Umoren, Moses Solomon, Shaikh A. Ali, Hatim D.M. Dafalla. Synthesis, characterization, and utilization of a diallylmethylamine-based cyclopolymer for corrosion mitigation in simulated acidizing environment. Materials Science and Engineering: C. 2019; 100 ():897-914.
Chicago/Turabian StyleSaviour A. Umoren; Moses Solomon; Shaikh A. Ali; Hatim D.M. Dafalla. 2019. "Synthesis, characterization, and utilization of a diallylmethylamine-based cyclopolymer for corrosion mitigation in simulated acidizing environment." Materials Science and Engineering: C 100, no. : 897-914.
Metallic pipelines and gathering tanks play a vital role during oil and gas exploration, production, transmission, and processing. These facilities are usually attacked by corrosion. The use of corrosion inhibitors is one of the most economical and reliable approaches to control the corrosion of oil and gas metallic facilities. This paper looks at the progress made in the development of sour corrosion inhibitors from early 1900 to date. Scientific literatures were reviewed. The review identified four classes of organic corrosion inhibitors for sour environments, namely, amine-based, imidazoline-based, polymer-based, and Gemini-surfactant-based inhibitors. The strengths and weaknesses of these inhibitors were highlighted. The review revealed that the patronage of amine-based chemistries has declined, and the current technology is based on imidazoline and quaternary salt chemistries. The existing knowledge gap and the future research direction in the area of sour corrosion inhibitors development have been highlighted.
I.B. Obot; Moses M. Solomon; Saviour A. Umoren; Rami Suleiman; Mohamed Elanany; Nayef M. Alanazi; Ahmad. A. Sorour. Progress in the development of sour corrosion inhibitors: Past, present, and future perspectives. Journal of Industrial and Engineering Chemistry 2019, 79, 1 -18.
AMA StyleI.B. Obot, Moses M. Solomon, Saviour A. Umoren, Rami Suleiman, Mohamed Elanany, Nayef M. Alanazi, Ahmad. A. Sorour. Progress in the development of sour corrosion inhibitors: Past, present, and future perspectives. Journal of Industrial and Engineering Chemistry. 2019; 79 ():1-18.
Chicago/Turabian StyleI.B. Obot; Moses M. Solomon; Saviour A. Umoren; Rami Suleiman; Mohamed Elanany; Nayef M. Alanazi; Ahmad. A. Sorour. 2019. "Progress in the development of sour corrosion inhibitors: Past, present, and future perspectives." Journal of Industrial and Engineering Chemistry 79, no. : 1-18.
The corrosion resistance properties of two ultra-high strength steels, Docol 1200 and 1400 were studied in 3.5 wt.% NaCl solution using chemical and electrochemical techniques supported by surface characterization techniques namely scanning electron microscope (SEM), energy dispersive spectroscopy (EDX), atomic force microscope (AFM), and optical profilometer. The mechanical properties of both Docol 1200 and Docol 1400 uncorroded and corroded were determined by tensile test. Results obtained reveal that the two alloys exhibit similar mechanical properties. Corrosion has effect on the mechanical properties of the alloys. Corrosion studies reveal that both Docol 1200 and 1400 are prone to corrosion in NaCl environment. A corrosion rate of 30.6 mpy and 49.6 mpy was recorded for a Docol 1200 at 25 oC and 60 oC, respectively. For Docol 1400, the corrosion rate obtained at 25 oC and 60 oC was 32.7 mpy and 52.4 mpy, respectively. Docol 1200 is adjudged to exhibit superior corrosion resistance property than Docol 1400. The optical profilometric results disclose that Docol 1200 and Docol 1400 suffered pitting corrosion in NaCl solution. Pitting corrosion was more severe with Docol 1400 than 1200.
Husnu Gerengi; Nuri Sen; Moses M. Solomon; İlyas Uygur. Corrosion response of ultra-high strength steels used for automotive applications. Materials Research Express 2019, 6, 0865a6 .
AMA StyleHusnu Gerengi, Nuri Sen, Moses M. Solomon, İlyas Uygur. Corrosion response of ultra-high strength steels used for automotive applications. Materials Research Express. 2019; 6 (8):0865a6.
Chicago/Turabian StyleHusnu Gerengi; Nuri Sen; Moses M. Solomon; İlyas Uygur. 2019. "Corrosion response of ultra-high strength steels used for automotive applications." Materials Research Express 6, no. 8: 0865a6.
There is a high demand of effective and eco-friendly corrosion inhibitor for industrial applications. In an attempt to prepare a benign and effective corrosion inhibitor for acidizing purpose, an imidazoline derivative, N-(2-(2-tridecyl-4,5-dihydro-1H-imidazol-1-yl)ethyl)tetradecanamide (NTETD) was synthesized from myristic acid and diethyleneamine. The characterization of the newly synthesized compound was done using 1H NMR, FTIR, and elemental analysis techniques. NTETD was examined as a corrosion inhibitor for low carbon steel in 15% HCl solution using weight loss, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), linear polarization (LPR), scanning electron microscope (SEM), energy dispersive spectroscopy (EDAX), atomic force spectroscopy (AFM), and X-ray photoelectron spectroscopy (XPS) techniques. It was found that, the optimum concentration of NTETD is 300 mg/L. With this concentration, inhibition efficiency above 93% is achievable. Results from PDP show that, NTETD acted as a mixed type corrosion inhibitor but with principal effect on cathodic corrosion half reactions. The calculated value of the adsorption-desorption equilibrium constant (1.015 × 103 L mol-1) reveals a strong bonding between NTETD molecules and the steel surface. The EDAX, FTIR, and XPS results confirm the adsorption of NTETD molecules on the steel surface. SEM and AFM results agree with experimental findings that NTETD is effective in corrosion mitigation of steel in 15% HCl solution. The possible corrosion inhibition mechanism by NTETD has been proposed.
Moses M. Solomon; Saviour Umoren; Mumtaz A. Quraishi; Mohammad Salman. Myristic acid based imidazoline derivative as effective corrosion inhibitor for steel in 15% HCl medium. Journal of Colloid and Interface Science 2019, 551, 47 -60.
AMA StyleMoses M. Solomon, Saviour Umoren, Mumtaz A. Quraishi, Mohammad Salman. Myristic acid based imidazoline derivative as effective corrosion inhibitor for steel in 15% HCl medium. Journal of Colloid and Interface Science. 2019; 551 ():47-60.
Chicago/Turabian StyleMoses M. Solomon; Saviour Umoren; Mumtaz A. Quraishi; Mohammad Salman. 2019. "Myristic acid based imidazoline derivative as effective corrosion inhibitor for steel in 15% HCl medium." Journal of Colloid and Interface Science 551, no. : 47-60.
Corrosion defined as the deterioration of a material when it interacts with its environment is a global problem. Among the different strategies employed to combat corrosion, use of coatings and corrosion inhibitors are the most popular. Coatings or corrosion inhibitors form a layer over the metallic substrate and protect it against corrosion. Polymers, both naturally occurring and synthetic have been tested for metal corrosion protection as replacement for the toxic inorganic and organic corrosion inhibitors. Interest in them stems from their availability, cost effectiveness, and eco-friendliness (especially for natural polymers) in addition to the inherent stability and multiple adsorption centers. However, it is found that most polymeric materials studied are moderate corrosion inhibitors. Several attempts such as copolymerization, addition of substances that exert synergistic effect, cross linking, blending, and most recently incorporation of inorganic substances in nano size into the polymer matrix have been made to improve the inhibition ability of polymers. In this review, the application of conducting polymers, polymer composites and nanocomposites for corrosion protection of different industrial metal substrates are explored based on reported experimental data and their mechanism of inhibition explained. Some identified drawbacks and future direction in this area have also been highlighted.
Saviour A. Umoren; Moses Solomon. Protective polymeric films for industrial substrates: A critical review on past and recent applications with conducting polymers and polymer composites/nanocomposites. Progress in Materials Science 2019, 104, 380 -450.
AMA StyleSaviour A. Umoren, Moses Solomon. Protective polymeric films for industrial substrates: A critical review on past and recent applications with conducting polymers and polymer composites/nanocomposites. Progress in Materials Science. 2019; 104 ():380-450.
Chicago/Turabian StyleSaviour A. Umoren; Moses Solomon. 2019. "Protective polymeric films for industrial substrates: A critical review on past and recent applications with conducting polymers and polymer composites/nanocomposites." Progress in Materials Science 104, no. : 380-450.
Plant biomaterials as inexpensive, nontoxic, biodegradable materials are found abundantly in nature. They contain heteroatoms and/or pi electrons that make them candidate for metals corrosion inhibitor. In recent years, numerous research works have been undertaken on plant biomaterials as metals corrosion inhibitor in different corrosive media. This review critically looks at the researches done in the years 2013–2018. Corrosive environments covered include acidic, basic, neutral, aqueous, geothermal fluid and artificial saliva. The major findings and the mechanism of inhibition has been elucidated. The missing gap in this area of research has been pointed out and future direction proposed.
Saviour A. Umoren; Moses M. Solomon; Ime B. Obot; Rami K. Suleiman. A critical review on the recent studies on plant biomaterials as corrosion inhibitors for industrial metals. Journal of Industrial and Engineering Chemistry 2019, 76, 91 -115.
AMA StyleSaviour A. Umoren, Moses M. Solomon, Ime B. Obot, Rami K. Suleiman. A critical review on the recent studies on plant biomaterials as corrosion inhibitors for industrial metals. Journal of Industrial and Engineering Chemistry. 2019; 76 ():91-115.
Chicago/Turabian StyleSaviour A. Umoren; Moses M. Solomon; Ime B. Obot; Rami K. Suleiman. 2019. "A critical review on the recent studies on plant biomaterials as corrosion inhibitors for industrial metals." Journal of Industrial and Engineering Chemistry 76, no. : 91-115.
The corrosion inhibition efficiency of 2-Thiobarbituric acid (TBA) for metal substrate (API X60 steel) in 3.5% NaCl solution saturated with CO2 gas was probed using various techniques namely, LPR (linear polarization resistance), EIS (electrochemical impedance spectroscopy), and PDP (potentiodynamic polarization). The effects of TBA concentration (25–100 ppm), solution pH (4 and 6), temperature (25–80 °C), and immersion time (2–72 h) on the inhibition efficiency were examined. SEM (scanning electron microscopy) and XPS (X–ray photoelectron spectroscopy) were deployed to explore the corrosion retardation mechanism. TBA exhibited protection efficiencies exceeding 90% for all experimental conditions considered. The excellent anticorrosion performance by TBA was retained up to 72 hours of immersion time. PDP results exhibited that TBA behaved as a mixed type inhibitor. Results from kinetics and thermodynamics analyses indicate that TBA chemically adsorbed on the steel surface following Langmuir isotherm model. The composition of the adsorbed TBA film has been analyzed by XPS.
Bashir J. Usman; Zuhair M. Gasem; Saviour A. Umoren; Moses M. Solomon. Eco-friendly 2-Thiobarbituric acid as a corrosion inhibitor for API 5L X60 steel in simulated sweet oilfield environment: Electrochemical and surface analysis studies. Scientific Reports 2019, 9, 830 .
AMA StyleBashir J. Usman, Zuhair M. Gasem, Saviour A. Umoren, Moses M. Solomon. Eco-friendly 2-Thiobarbituric acid as a corrosion inhibitor for API 5L X60 steel in simulated sweet oilfield environment: Electrochemical and surface analysis studies. Scientific Reports. 2019; 9 (1):830.
Chicago/Turabian StyleBashir J. Usman; Zuhair M. Gasem; Saviour A. Umoren; Moses M. Solomon. 2019. "Eco-friendly 2-Thiobarbituric acid as a corrosion inhibitor for API 5L X60 steel in simulated sweet oilfield environment: Electrochemical and surface analysis studies." Scientific Reports 9, no. 1: 830.