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Dr. Saviour A. Umoren is an Associate Professor/Research Scientist I at the Interdisciplinary Research Center for Advanced Materials of the Research Institute, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia. He obtained his BSc degree in Applied Chemistry from the University of Jos, Nigeria, in 1990; his MSc degree and PhD in Polymer Science from the Federal University of Technology, Owerri, Nigeria, in 1997 and 2008, respectively. He was a visiting researcher at the Research Institute of Theoretical and Applied Physical Chemistry (INIFTA), La Plata, Argentina, courtesy of the TWAS–UNESCO Associateship appointment.
The phytochemical analysis of the butanolic extract from the leaves of date palm of Saudi origin resulted in the isolation of three major constituents, oleanolic acid (1), vanillyl alcohol (2), and β-sitosterol-3-O-β-d-glucoside (3), which had not been isolated from this plant or previously reported. Together, compounds 1 and 2 account for 1.0% of the butanol extract, which represents 0.4% of the mass of the dried leaves. The isolation of other known compounds for this plant such as fatty acids, lutein, and sucrose was also achieved in this study. The characterization and identification of the isolated compounds were conducted on the basis of Fourier-transform infrared spectroscopy (FTIR), 1H and 13C nuclear magnetic resonance (NMR), liquid chromatography–mass spectrometry (LC–MS), and gas chromatography–mass spectrometry (GC–MS) analyses. The findings of the current study will definitely increase the knowledge about the contribution of the constituents of this plant to its well-known nutrition, corrosion inhibition, and antimicrobial properties.
Rami Suleiman; Wissam Iali; Bassam El Ali; Saviour Umoren. New Constituents from the Leaves of Date Palm (Phoenix dactylifera L.) of Saudi Origin. Molecules 2021, 26, 4192 .
AMA StyleRami Suleiman, Wissam Iali, Bassam El Ali, Saviour Umoren. New Constituents from the Leaves of Date Palm (Phoenix dactylifera L.) of Saudi Origin. Molecules. 2021; 26 (14):4192.
Chicago/Turabian StyleRami Suleiman; Wissam Iali; Bassam El Ali; Saviour Umoren. 2021. "New Constituents from the Leaves of Date Palm (Phoenix dactylifera L.) of Saudi Origin." Molecules 26, no. 14: 4192.
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.
Mohd Sabri Mohd Ghazali; Universiti Malaysia Terengganu; Nabilah Ismail; Mohammad Fakhratul Ridwan Zulkifli; Wan Mohd Norsani Bin Wan Nik; Saviour Alphonsus Umoren; Chennapan Kamal; Jiyaul Haque; King Fahd University of Petroleum and Minerals; Banaras Hindu University. EMPLOYING Cymbopogon citratus (LEMONGRASS) AS ECO-FRIENDLY CORROSION INHIBITOR FOR MILD STEEL IN SEAWATER. JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT 2021, 16, 71 -82.
AMA StyleMohd Sabri Mohd Ghazali, Universiti Malaysia Terengganu, Nabilah Ismail, Mohammad Fakhratul Ridwan Zulkifli, Wan Mohd Norsani Bin Wan Nik, Saviour Alphonsus Umoren, Chennapan Kamal, Jiyaul Haque, King Fahd University of Petroleum and Minerals, Banaras Hindu University. EMPLOYING Cymbopogon citratus (LEMONGRASS) AS ECO-FRIENDLY CORROSION INHIBITOR FOR MILD STEEL IN SEAWATER. JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT. 2021; 16 (3):71-82.
Chicago/Turabian StyleMohd Sabri Mohd Ghazali; Universiti Malaysia Terengganu; Nabilah Ismail; Mohammad Fakhratul Ridwan Zulkifli; Wan Mohd Norsani Bin Wan Nik; Saviour Alphonsus Umoren; Chennapan Kamal; Jiyaul Haque; King Fahd University of Petroleum and Minerals; Banaras Hindu University. 2021. "EMPLOYING Cymbopogon citratus (LEMONGRASS) AS ECO-FRIENDLY CORROSION INHIBITOR FOR MILD STEEL IN SEAWATER." JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT 16, no. 3: 71-82.
Date palm leaves (DPL) was extracted using acetone (ACE), ethanol (ETH), aqueous (AE), butanol (BUT), methanol (METH), isopropanol (ISO), and ethyl acetate (EHY ACT). The extracts were characterized using Fourier-transform infrared spectroscopy (FTIR) and ultraviolet-visible (UV-vis) spectroscopy. The various solvent DPL extracts were screened for anticorrosion property against low carbon steel in 15 wt.% HCl solution at 25 °C. ACE, AE, and ETH DPL extracts are found to promote the corrosion of the low carbon steel while BUT, ISO, METH, and EHY ACT DPL extracts exhibit anticorrosion property. However, BUT DPL extract shows the best anticorrosion property with 400 ppm protecting the low carbon steel by 82%. Based on the results from the screening experiments, BUT extract was selected for a comprehensive corrosion inhibition study. Inhibition effectiveness of BUT DPL extract is found to increase with increasing concentration with 1000 ppm affording 97% protection at 25 °C. The inhibition performance increases up to 40 °C but slightly decreases as the temperature was raised to 50 °C and 60 °C. However, BUT DPL extract could afford 86% protection at 60 °C. Scanning electron microscope and atomic force spectroscopy results confirm that BUT DPL extract is indeed an effective inhibitor for X60 carbon steel in 15 wt.% HCl solution.
Saviour A. Umoren; Moses M. Solomon; Ime B. Obot; Rami K. Suleiman. Date palm leaves extract as a green and sustainable corrosion inhibitor for low carbon steel in 15 wt.% HCl solution: the role of extraction solvent on inhibition effect. Environmental Science and Pollution Research 2021, 28, 40879 -40894.
AMA StyleSaviour A. Umoren, Moses M. Solomon, Ime B. Obot, Rami K. Suleiman. Date palm leaves extract as a green and sustainable corrosion inhibitor for low carbon steel in 15 wt.% HCl solution: the role of extraction solvent on inhibition effect. Environmental Science and Pollution Research. 2021; 28 (30):40879-40894.
Chicago/Turabian StyleSaviour A. Umoren; Moses M. Solomon; Ime B. Obot; Rami K. Suleiman. 2021. "Date palm leaves extract as a green and sustainable corrosion inhibitor for low carbon steel in 15 wt.% HCl solution: the role of extraction solvent on inhibition effect." Environmental Science and Pollution Research 28, no. 30: 40879-40894.
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.
Being a natural and renewable polysaccharide, pectin (PC) is considered a polymer with promising potential for many applications. In the present investigation, novel multifunctional pectin/polypyrrole (PC/PPy) composite coatings loaded with gentamicin (GM) were electrochemically deposited on TiNbZr alloy to enhance its biocompatibility, antibacterial performance and corrosion resistance in physiological environment. Various surface and structural characterization techniques were deployed to examine the composite coatings. in vitro corrosion analysis confirmed that the composite coated TiNbZr specimen exhibited higher corrosion resistant performance in simulated body fluid (SBF). The drug release kinetics was estimated and the results corroborated the sustained release of GM from the controlled degradation of the composite matrix. The pectin composite coatings exhibited effective antibacterial performance; due to the sustained release of GM. In-vitro cell culture studies validated the improved biocompatibility of the composite coatings. Among the developed coatings, composite coatings loaded with 10 wt. % of GM exhibited the lowest corrosion rate, enhanced biocompatibility, and antibacterial performance.
A. Madhan Kumar; Akeem Yusuf Adesina; M.A. Hussein; Saviour A. Umoren; Suresh Ramakrishna; S. Saravanan. Preparation and characterization of Pectin/Polypyrrole based multifunctional coatings on TiNbZr alloy for orthopaedic applications. Carbohydrate Polymers 2020, 242, 116285 .
AMA StyleA. Madhan Kumar, Akeem Yusuf Adesina, M.A. Hussein, Saviour A. Umoren, Suresh Ramakrishna, S. Saravanan. Preparation and characterization of Pectin/Polypyrrole based multifunctional coatings on TiNbZr alloy for orthopaedic applications. Carbohydrate Polymers. 2020; 242 ():116285.
Chicago/Turabian StyleA. Madhan Kumar; Akeem Yusuf Adesina; M.A. Hussein; Saviour A. Umoren; Suresh Ramakrishna; S. Saravanan. 2020. "Preparation and characterization of Pectin/Polypyrrole based multifunctional coatings on TiNbZr alloy for orthopaedic applications." Carbohydrate Polymers 242, no. : 116285.
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.
The addition of chemical additives has been considered as a standard operation in water treatment systems. This chapter discusses the chemical additives used for the control of corrosion in desalination systems. Specifically, corrosion inhibitors for various metallurgies, biocides, and oxygen scavengers are covered. The pros and cons of the additive chemicals have been highlighted. The need to utilize green corrosion inhibitors based on plants and ionic liquids materials have been emphasized. This class of materials are environmentally friendly, cheap, and readily available.
Saviour A. Umoren; Moses M. Solomon. Chemical Additives for Corrosion Control in Desalination Plants. Corrosion and Fouling Control in Desalination Industry 2020, 191 -207.
AMA StyleSaviour A. Umoren, Moses M. Solomon. Chemical Additives for Corrosion Control in Desalination Plants. Corrosion and Fouling Control in Desalination Industry. 2020; ():191-207.
Chicago/Turabian StyleSaviour A. Umoren; Moses M. Solomon. 2020. "Chemical Additives for Corrosion Control in Desalination Plants." Corrosion and Fouling Control in Desalination Industry , no. : 191-207.
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Bashir J. Usman; Zuhair M. Gasem; Saviour A. Umoren; Moses M. Solomon. Publisher Correction: 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 2020, 10, 1 -1.
AMA StyleBashir J. Usman, Zuhair M. Gasem, Saviour A. Umoren, Moses M. Solomon. Publisher Correction: 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. 2020; 10 (1):1-1.
Chicago/Turabian StyleBashir J. Usman; Zuhair M. Gasem; Saviour A. Umoren; Moses M. Solomon. 2020. "Publisher Correction: 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 10, no. 1: 1-1.
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.
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.
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.
Investigation into amitriptyline (AMI) as a corrosion inhibitor for different grades of pipeline steels (X80, J55 and mild steel) was undertaken under static conditions in 3.7% and 15% HCl solution and temperature ranging from 30 to 90 °C using electrochemical, gravimetric, and surface screening approaches. AMI is adjudged an effective steel corrosion inhibitor in 3.7% HCl at 30 °C but poor inhibitor at high temperatures and in 15% HCl. The values of enthalpy of adsorption and variation of protection efficacy with temperature point to physical interaction between AMI molecules and the steel surface. Evidence of formation of adsorbed film on the specimen surface has been found via Scanning electron microscope (SEM) and energy dispersive spectroscopy (EDAX) screening. Various formulations consisting of AMI as the base component and other additives (potassium iodide, glutathione and N-acetyl cysteine) have been developed. The formulations were tested at different experimental conditions and inhibition performance compared with that of a commercial corrosion inhibitor. Results obtained show that AMI based formulations can compete favorably with commercial inhibitor even at severe conditions. In 15% HCl solution and temperature of 90 °C, inhibition efficiency of 94% is recorded for commercial inhibitor and 92% for AMI based formulation. AMI based formulation can be utilized as effective corrosion inhibitor in oil and gas production.
Ekemini B. Ituen; Moses Solomon; Saviour A. Umoren; Onyewuchi Akaranta. Corrosion inhibition by amitriptyline and amitriptyline based formulations for steels in simulated pickling and acidizing media. Journal of Petroleum Science and Engineering 2018, 174, 984 -996.
AMA StyleEkemini B. Ituen, Moses Solomon, Saviour A. Umoren, Onyewuchi Akaranta. Corrosion inhibition by amitriptyline and amitriptyline based formulations for steels in simulated pickling and acidizing media. Journal of Petroleum Science and Engineering. 2018; 174 ():984-996.
Chicago/Turabian StyleEkemini B. Ituen; Moses Solomon; Saviour A. Umoren; Onyewuchi Akaranta. 2018. "Corrosion inhibition by amitriptyline and amitriptyline based formulations for steels in simulated pickling and acidizing media." Journal of Petroleum Science and Engineering 174, no. : 984-996.
A novel palmitic imidazoline compound, N-(2-(2-pentadecyl-4,5-dihydro-1H-imidazol-1-yl)ethyl)palmitamide (NIMP) has been successfully synthesized and characterized with Fourier transform spectroscopy (FTIR), Proton nuclear magnetic resonance (1H NMR), and Carbon-13 nuclear magnetic resonance (13C NMR). NIMP has been tested as corrosion inhibitor for N80 steel in 15% HCl solution at low and elevated temperatures using weight loss measurements, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), linear polarization (LPR), and electrochemical frequency modulation (EFM) techniques. The experimental investigation was supported with surface examination using scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDAX), and Fourier transform spectroscopy (FTIR). NIMP is found to be effective in retarding N80 steel dissolution in 15% HCl solution at studied temperatures. The optimum concentration of NIMP is 300 ppm and this concentration afforded corrosion protection efficiency of 97.92% and 95.59% at 25 °C and 60 °C respectively from weight loss measurements. Chemisorption is proposed as the mechanism of adsorption of NIMP molecules onto N80 steel surface based on the value of standard enthalpy of adsorption (100.34 kJ/mol). PDP results disclosed that NIMP acted like a mixed type corrosion inhibitor but with principal effect on cathodic corrosion reactions. Surface screening results are in agreement with experimental results that NIMP molecules adsorbed on N80 steel surface. NIMP can be utilized as an acidizing corrosion inhibitor.
Moses Solomon; Saviour A. Umoren; M.A. Quraishi; M.A. Jafar Mazumder. Corrosion inhibition of N80 steel in simulated acidizing environment by N-(2-(2-pentadecyl-4,5-dihydro-1H-imidazol-1-YL) ethyl) palmitamide. Journal of Molecular Liquids 2018, 273, 476 -487.
AMA StyleMoses Solomon, Saviour A. Umoren, M.A. Quraishi, M.A. Jafar Mazumder. Corrosion inhibition of N80 steel in simulated acidizing environment by N-(2-(2-pentadecyl-4,5-dihydro-1H-imidazol-1-YL) ethyl) palmitamide. Journal of Molecular Liquids. 2018; 273 ():476-487.
Chicago/Turabian StyleMoses Solomon; Saviour A. Umoren; M.A. Quraishi; M.A. Jafar Mazumder. 2018. "Corrosion inhibition of N80 steel in simulated acidizing environment by N-(2-(2-pentadecyl-4,5-dihydro-1H-imidazol-1-YL) ethyl) palmitamide." Journal of Molecular Liquids 273, no. : 476-487.
The study was aimed at establishing the possibility of using eco-friendly natural polymers to formulate corrosion inhibitors for sweet oil field environment. Against this background, the performance of two natural polymers; chitosan and carboxymethyl cellulose (CMC) as single component corrosion inhibitors in comparison with a commercial inhibitor formulations, on API 5L X60 pipeline steel in CO saturated 3.5% NaCl solution were investigated using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques; complemented with surface morphology characterization of the corroded steel samples without and with inhibitors using scanning electron microscope (SEM). The results indicate that there is a remarkable difference in inhibition efficiency of each inhibitor on the API 5L X60 steel and the commercial inhibitor formulations. Inhibition efficiency increased with the increase of inhibitors' concentrations. Immersion time was found to have a profound effect on the corrosion inhibition performance of all the inhibitors. Also the inhibition efficiency was found to decrease with the increase in temperature. Potentiodynamic polarization results reveal a mixed-type inhibition for all inhibitors. The adsorption of each inhibitor on the steel surface obeys Langmuir's isotherm.
Saviour A. Umoren; Abdullah A. AlAhmary; Zuhair M. Gasem; Moses M. Solomon. Evaluation of chitosan and carboxymethyl cellulose as ecofriendly corrosion inhibitors for steel. International Journal of Biological Macromolecules 2018, 117, 1017 -1028.
AMA StyleSaviour A. Umoren, Abdullah A. AlAhmary, Zuhair M. Gasem, Moses M. Solomon. Evaluation of chitosan and carboxymethyl cellulose as ecofriendly corrosion inhibitors for steel. International Journal of Biological Macromolecules. 2018; 117 ():1017-1028.
Chicago/Turabian StyleSaviour A. Umoren; Abdullah A. AlAhmary; Zuhair M. Gasem; Moses M. Solomon. 2018. "Evaluation of chitosan and carboxymethyl cellulose as ecofriendly corrosion inhibitors for steel." International Journal of Biological Macromolecules 117, no. : 1017-1028.