Ime B Obot

Ime B Obot
King Fahd University of Petroleum and Minerals | KFUPM · Interdisciplinary Research Center for Advanced Materials

Doctor of Philosophy- Physical Chemistry (Corrosion Science)

About

283
Publications
136,229
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Introduction
I am a Professor and Researcher. I teach and conduct high-quality research in Corrosion Science and Engineering. I am also a Consultant and Project Coordinator for many Industrial Projects on Corrosion Mitigation and Control. My Research Interests include Corrosion in the Oil and Gas, Petrochemical, Chemical, and the Desalination Industries; Corrosion and Scale Inhibition; Sweet Corrosion; Sour Corrosion; QSAR, Machine learning, Molecular Modeling (DFT, MD and Monte Carlo Simulations).
Additional affiliations
November 2012 - January 2021
King Fahd University of Petroleum and Minerals
Position
  • Professor (Associate)
Description
  • Iam the Group Leader of the Corrosion Inhibition Program at the Center of Research Excellence in Corrosion at KFUPM. My Research Interests Covers a Wide Range of Assets Integrity Protection and Corrosion Control Area. These include Control Control in Oil and Gas, Desalination industry, Chemical and Petrochemical Industries. I also Conduct Research in Corrosion Inhibition, Sweet Corrosion; Sour Corrosion; QSAR and Machine learning and Molecular Modeling (DFT, MD and Monte Carlo Simulations).
Education
September 2007 - August 2012
University of Ibadan
Field of study
  • Physical Chemistry-Corrosion Science

Publications

Publications (283)
Article
Epoxy resins are widely used as construction and repair materials. However, their bond with the concrete substrate under wet conditions is of concern as the loss of compatibility will lead to the failure of the bonded system. The reported study investigated the effect of surface moisture at the epoxy/cement interface using molecular dynamics (MD) s...
Article
The anti-corrosion behaviour of synthesized 1-(2-(5-mercapto-4-phenyl-4H-1,2,4-triazole-3-yl)phenyl)-3-phenylthiourea (MTPT) and 1-phenyl-3-(2-(5-(phenylamino)-1,3,4-thiadiazol-2-yl)phenyl)thiourea (PDPT) were examined by weight loss and electrochemical approaches for the oil well and pipeline steel tube (mild steel) in 15% HCl solution. The output...
Article
The search and discovery of corrosion inhibitors to mitigate sweet corrosion in the oil and gas industry has been carried out mainly using tedious and costly experimental approaches. In this study, theoretical approach using density functional theory (DFT) and molecular dynamics (MD) simulation were utilized to investigate the adsorption and diffus...
Article
Background Corrosion challenges in the oil transportation pipelines operations worldwide is a serious problem and can lead to accelerated corrosion rates, loss of mechanical integrity and catastrophic failure. The survey of the literature reveals that few polymers haven been investigated as sweet corrosion inhibitors when compared to other small ni...
Article
2-(6-hydroxy-3-oxo-3H-xanthen-9-yl) benzoic acid (opened form of Fluorescein) (NAR4) were investigated and compared to 3,6-dihydroxy-3H Spiro[isobenzofuran-1,9-xanthen]-3-one (Closed form of Fluorescein) (FLUO) using experimental and theoretical approaches. The theoretical methods used were DFT method at B3LYP/6-311G (d. p) and Monte Carlo simulati...
Article
The effect of molecular structure on the performance of three triazole derivatives namely benzotriazole (BZT), 5-methyl-1H-benzotriazole (5MBZT), and 3-amino-5-methylthio-1H-1,2,4, triazole (3AMT) as corrosion inhibitors for C1020 steel and pure copper in 2% hydrochloric acid (HCl), which simulate descaling process in a typical desalination plant w...
Article
Composites are commonly used in engineering applications. One example is the polymer-cement composites, where the polymers are used to modify/reinforce the cement mortar and concrete. In this regard, the bottom-up understanding of such complex nano-composites can be achieved through atomistic simulation and modeling at the atomic level. This review...
Article
The present work reports on the corrosion inhibition property of compounds isolated from butanolic extract of Date Palm leaves for low carbon steel in 15% HCl solution. Six compounds were isolated from Date Palm leaves and purified using a combination of column chromatography, thin layer chromatography, and Prep HPLC-MS system. The isolated compoun...
Chapter
Different corrosion measurement techniques have been used in determining the efficiency of corrosion inhibitors. These techniques such as weight loss are tedious and time consuming and do not provide any information on the mechanism of interaction of the corrosion inhibitor with the metal surface at the molecular level. With the advancement in comp...
Article
The experimental, molecular dynamics (MD) simulation, and density functional theory (DFT) study approach were used to investigate the comparative anticorrosion performance of 1,12-Dodecyldiyl-bis(dimethyloctylammonium bromide);TDAB C-8, 1,12-Dodecyldiyl-bis(dimethyldodecylammoniumbromide);TDAB C-12, and 1,12-Dodecyldiyl-bis(dimethylhexadecylammoniu...
Patent
environmentally friendly corrosion inhibitor for ferrous and non ferrous alloys subject to descaling operation.
Article
The investigation presents the superior corrosion inhibition capabilities of two novel indoline compounds namely 2-(1-(4-((furan-2-ylmethylene)amino)-5-thioxo-4,5-dihydro-1H-1,2,4-triazol-3-yl)-2-(1H-imidazol-2-yl)ethyl)isoindoline-1,3-dione (FTTI) and 2-(1-(4-((furan-2-ylmethylene)amino)-5-thioxo-4,5-dihydro-1H-1,2,4-triazol-3-yl)-2-methylbutyl)is...
Article
The corrosion of metals remains a worldwide scientific challenge, as it affects the metallurgical, chemical, oil and gas industries and causes damages worth billions of dollars of economic loss annually. An ideal corrosion inhibitor should diminish the metal dissolution and provide an appropriate solution to mitigate or halt structural damage. For...
Article
The two triazepine derivatives, 2-amino-9-(1H-indol-3-yl)-4-(4-methoxyphenyl)-7-oxo-1,7-dihydropyrido[1,2-b][1], [2], [4]triazepine-3,8,10-tricarbonitrile [AITT] and ethyl 2-amino-8,10-dicyano-9-(2-hydroxy-3-methoxyphenyl)-4-(4-methoxyphenyl)-7-oxo-1,7-dihydropyrido [1,2 -b][1], [2], [4]triazepine-3-carboxylate [EHTC] were successfully synthesized...
Article
For the first time, this work explores the application of a quin-olone derivative, namely, (E)-2-amino-7-hydroxy-4-styrylquinoline-3-carbonitrile, in the corrosion inhibition of C1018 steel surface in 3.5% NaCl (CO 2 saturated). The quinoline derivative was prepared in a facile single-step method using the microwave-assisted synthesis protocol. A d...
Article
Full-text available
Corrosion is one of the most important challenges facing petroleum refineries. It has received wide attention in recent decades due to the continued dependence of the global economy on industries based on oil and natural gas. With annual corrosion cost estimated at billions of dollars, suitable corrosion mitigation approaches are required to preven...
Article
Full-text available
The corrosion inhibition of newly synthesized Schiff base derivatives, namely (E)-3-(1-((2-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMO), (E)-3-(1-((3-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMM), and (E)-3-(1-((4-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMP) was investigated for mild steel,...
Article
Hydrated cement is one of the complex composite systems due to the presence of multi-scale phases with varying morphologies. Calcium silicate hydrate (C–S–H), which is the principal binder phase in the hydrated cement, is responsible for the stiffness, strength, and durability of Portland cement concrete. To understand the mechanical and durability...
Article
Full-text available
In this work, nitrogen-doped carbon dots (NCDs) were obtained by hydrothermal method with citric acid and ethylenediamine as precursors. The corrosion inhibition performance and mechanism of prepared the NCDs on the Q235 carbon steel in 1 M HCl solution were evaluated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization cur...
Article
The inhibition mechanism of mild steel corrosion in aerated aqueous 3% NaCl medium was studied using Polyepoxy succinic acid (PESA) as a green inhibitor. The study utilized electrochemical, thermodynamic, and surface microscopic techniques. Computational methods supported the empirical results of the inhibition mechanism at the molecular level. Res...
Article
Full-text available
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...
Article
Full-text available
Under deposit corrosion (UDC) is a serious risk in the industry, threatening critical failures in oil and gas pipelines, boiler and heat exchanger tubes, cooling systems and wastewater treatment facilities. Generally speaking, there is no single defined mechanism for UDC as it follows any of many different routes depending on the local chemistry an...
Article
Ethyl acetate (EA) production plants is among the many industrial facilities where corrosion is a major concern. EA plant suffers from various forms of corrosion because of the simultaneous use of strong mineral acids, high temperature and flow environment, presence of aqueous environment, and feedstock contamination. Stainless steels, which are mo...
Article
The ethanol extract of bamboo shoots was obtained by refluxing bamboo shoots in 95 % ethanol, and then the ethanol extract from bamboo shoots were separated by organic solvents with different polarity, including petroleum ether, dichloromethane, ethyl acetate and n-butanol. The inhibitive effect of different solvent extraction fractions of bamboo s...
Article
Full-text available
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, e...
Article
Full-text available
The extent of corrosion inhibition of macrocyclic crown ether compounds namely 2,14-bis(benzo[d]thiazol-2-yl)-6,7,9,10,17,18,20,21-octahydrodibenzo[b,k][1,4,7,10,13,16]hexaoxacyclo octadecine [BOH] and 2-(6,7,9,10,17,18,20,21-octahydrodibenzo[b,k][1,4,7,10,13,16]hexa oxa cyclooctadecin-2-yl)benzo[d]thiazole [OHB] was investigated experimentally and...
Article
Full-text available
Top of the line corrosion (TLC) is a phenomenon of global importance in the crude oil and gas extraction industry and is particularly a source of problems for both offshore and onshore fields. It is often responsible for accelerated corrosion rates, loss of mechanical integrity and catastrophic failures in wet gas pipelines. This form of corrosion...
Article
Thioglycoluril (3a,6a−bistolylthioglycoluril (BSTGCU)) was first introduced as a new and green corrosion inhibitor for low carbon steel in a 1 M HCl medium. The inhibition properties of BSTGCU in a 1 M HCl were fully characterized by the gravimetric, thermodynamic, potentiodynamic polarisation (PDP), electrochemical impedance spectroscopy (EIS), el...
Article
Full-text available
Three novel N-hydrospiro-chromeno-carbonitriles namely, 2-amino-7,7-dimethyl-1′,3′,5-trioxo-1′,3′,5,6,7,8-hexahydrospiro[chromene-4,2′-indene]-3-carbonitrile (INH-1), 3-amino-7,7-dimethyl-2′,5-dioxo-5,6,7,8-tetrahydrospiro[chromene-4,3′-indoline]-2-carbonitrile (INH-2) and 3′-amino-7′,7′-dimethyl-2,5′-dioxo-5′,6′,7′,8′-tetrahydro-2H-spiro[acenaphth...
Article
A green and cost-effective inhibitor based on Date palm leaves extract was formulated for use during acid cleaning of thermal desalination plants. The inhibitor formulation designated as F1 was tested against the corrosion of ferrous-based alloys namely: carbon steel, Ni-resist, and 316L stainless steel in 2% HCl solution at 40 °C under static and...
Article
In this work, we used experimental and theoretical calculation methods to investigate the corrosion inhibition nature of banana leaves water extract (BLWE) for X70 steel at 1 mol/L hydrochloric acid environment. The data of electrochemical tests manifest that the hydrochloric acid medium will accelerate the corrosion of X70 steel with increasing te...
Article
Present investigation focused on to study the corrosion inhibition capabilities of pyrimidine derivatives; MPA [4,6-bis(4-methoxyphenyl) pyrimidin-2-amine] and CPA [4,6-bis(4-chlorophenyl) pyrimidin-2-amine] for oil well/tubing steel (N80 steel) in 15 % HCl solution. Corrosion inhibition efficiency of both inhibitors increases on increasing the con...
Article
Inhibition of Type 304 L SS corrosion in 0.5 M HCl by New Fuchsin is reported using potentiodynamic polarization, electrochemical impedance spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) techniques. The study was complemented by DFT calculations and Monte Carlo simulation (MCS), and the data were interpreted in...
Article
The present work reports the application of 1,3,5-tris(4-methoxyphenyl)-1,3,5-triazinane for the inhibition of X60 steel corrosion in 3.5% NaCl saturated with CO 2. The compound was synthesized using a facile ultrasonic irradiation method, and for the first time, a comparative analysis of the static and hydrodynamic conditions was performed. The re...
Article
Full-text available
In this work, we studied 2-phenylbenzimidazole (PBI) as a corrosion inhibitor for X65 steel in H2SO4 medium. The inhibition performance of PBI for X65 steel were studied using weight loss, electrochemical experiments, surface analysis and computational modelings. The results indicate that PBI has a superior anti-corrosion performance and belongs to...
Article
In 1 M HCl solution, three selected amino acid ester salt based ionic liquids ([AAE][Sac] ILs), namely L-Phenyl Alanine methyl ester saccharinate ([PheME][Sac]), L-Leucine methyl ester saccharinate ([LeuME][Sac]), and L-Alanine methyl ester saccharinate ([AlaME][Sac]) under static conditions were examined as potent green corrosion inhibitors for mi...
Article
The corrosion potential of three newly studied ionic liquids (ILs) namely, 5-(Trifluoromethyl) dibenzothiopheniumtetrafluoroborate (TDTB), 5-(Trifluoromethyl)dibenzothiopheniumtrifluoromethanesulfonate (TDTM) and 1-Ethyl-3-methylimidazolium ethyl sulfate (EMIM)(ESO4) were investigated towards the kinetics and thermodynamics of corrosive properties...
Article
The behavior of synthesized (E)-5-amino-3-(4-methoxyphenyl)-N′-(1-(4-methoxyphenyl)ethylidene)-1H-pyrazole-4-carbohydrazide [AMPC] and (E)-5-amino-N′-(4-chlorobenzylidene)-3-(4-chlorophenyl)-1H-pyrazole-4-carbohydrazide [ACPC] towards the corrosion protection of mild steel (MS) in 15% HCl solution was studied by gravimetric and electrochemical meth...
Article
Time–evolution study of 2-(2-pyridyl) benzimidazole (2PB) as CO2 corrosion inhibitor for API X60 steel under hydrodynamic conditions in a synthetic brine solution has been undertaken. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques were employed for this study. The results indicate that 2.56 mM of 2PB...
Article
Full-text available
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...
Article
Corrosion is one of the challenging problems faced by most of the industries. Corrosion inhibitors are required to overcome the corrosion problem in these industries. Although a large number of organic corrosion inhibitors are reported in literature but most of them are toxic and effective at larger concentrations. Therefore there is a need to sear...
Article
Time–evolution study of 2-(2-pyridyl) benzimidazole (2PB) as CO2 corrosion inhibitor for API X60 steel under hydrodynamic conditions in a synthetic brine solution has been undertaken. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques were employed for this study. The results indicate that 2.56 mM of 2PB...
Article
Full-text available
Dodecyl pyridinium bromide (DDPB), tetradecyl pyridinium bromide (TDPB) and dodecyl 1,1′-bispyridinium dibromide (DDBPB) were successfully synthesized, characterized and evaluated for HCl pickling of X-60 low carbon steel. Order of corrosion inhibitions efficiencies, as revealed by both electrochemical and gravimetric studies, is TDPB > DDPB > DDBP...
Article
The corrosion inhibition properties of two benzimidazole derivatives 2-(2-Bromophenyl)-1H-benzimidazole (BHB) and 2-(2-Bromophenyl)-1-methyl-1H-benzimidazole (BMB) for X60 steel in 1 M HCl solution were investigated under laminar and turbulent flow conditions. Experimental methods (electrochemical impedance spectroscopy, linear polarization and pot...
Article
Full-text available
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 moderate...
Article
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 at low and high temperatures using the weight loss, electrochemical (potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), & cyclic voltammetry (CV)), and...
Article
The corrosion protection of N80 steel in 15% HCl by two pyrazolone derivatives namely 2-(3-amino-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)(p-tolyl)methyl)malononitrile (PZ-1) and 2-((3-amino-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)(phenyl)methyl)malononitrile (PZ-2) has been investigated by using gravimetric, electrochemical and quantum chemical studies. The ob...
Article
Full-text available
Dye that is consisting of donor-π-π-linkers-acceptor (D-π-π-A) is characterised by enhancement of light-harvesting capability in dye-sensitised solar cell (DSSC) applications. In this work, the DFT and TDDFT using the CAM-B3LYP XC-functional with 6-31G+(d) basis set and were used to study the geometrical, electronic, and photovoltaic properties of...
Article
A new environmentally friendly and cost effective molecule, thiabendazole (TBZ), was evaluated as a potential acid corrosion inhibitor for a typical carbon steel (C1020 grade) used as construction material in MSF desalination plant using electrochemical and (weight loss) immersion techniques. Electrochemical measurements after 1, 4 and 8 h immersio...
Article
The potential of an environmentally friendly novel synthesized and characterized isoxazoli-dine derivative namely 5-(4-dodecyloxy-3-methoxybenzyl)-2-methylisoxazolidine (DMBMI)as anticorrosion agent for carbon steel in 1 mol/L HCl solution was investigated using gravimetric and electrochemical techniques. Kinetics parameters of the corrosion proces...
Article
Full-text available
HCl pickling treatment is utilized to remove mill scales from mild steel (MS) surface at different temperatures up to 328 ± 2 K. In order to minimize the metal dissolution, newly multifunctional heterocycles based on 8-hydroxyquinoline namely 3-((8-hydroxyquinolin-5yl)-methyl)-2-phenylquinazolin-4(3H)-one (HQ-ZH), 3-((8-hydroxyquinliene-5-yl)-2-(4-...
Article
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...
Article
In the present investigation two hydrazinobenzothiazole compounds 6-(2-(benzo[d]thiazol-2-yl)hydrazono)hexane-1,2,3,4,5-pentaol (BTHP) and 5-(2-(benzo[d]thiazol-2-yl)hydrazono)pentane-1,2,3,4-tetraol (BTHT) were prepared. These compounds having heteroatoms as active sites were investigated for scaling down the corrosion process in N80 steel. The ef...
Article
Electrochemical, anticorrosion and adsorption behaviour of bio-based melatonin (MEL) in 5% HCl solution was investigated by experimental and theoretical approaches. MEL was found to possess high adsorptive capacity for steel surface and inhibits the acid corrosion. With a concentration of 10 mM, inhibition efficiency of 98.3% and 88.6% were obtaine...
Article
Full-text available
Present study deals with the synthesis, characterization and inhibition property of two epoxy resins (ERs) namely,2,2′-(((sulfonylbis(4,1-phenylene)) bis (oxy))bis(methylene)) bis (oxirane) (ER1) and 2,2′-bis(oxiran-2-ylmethoxy)-1,1′-biphenyl (ER2) on carbon steel corrosion in 1 M HCl medium using experimental and computational methods. Results sho...
Article
The present study is designed to demonstrate the substituent dependent molecular structures on inhibition property of four heterocyclic compounds containing nitrogen, sulfur and oxygen atoms for mild steel corrosion in 1 M HCl. Their inhibition effect was measured using weight loss, open circuit potential (OCP), potentiodynamic polarization (PDP) a...
Article
An amine-functionalized Glucose namely Hexamethylene-1,6-bis(N–D-glucopyranosylamine) (HGA) was synthesized and characterized. The corrosion inhibition behavior of HGA on API X60 steel in 3.5 wt.% NaCl saturated with CO2 was evaluated by electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM), linear polarization re...
Article
A newly synthesized pyrimidine–based compound, 5-(4-hydroxy-3-methoxyphenyl)-2,7-dithioxo-2,3,5,6,7,8-hexahydropyrimido[4,5-d]pyrimidin-4(1H)-one (PP), was evaluated as a promising inhibitor for the CO2 corrosion of API X60 steel in NACE 1D196 brine solution. Under rotation speed of 1000 rpm, electrochemical impedance spectroscopy (EIS) and potenti...
Article
Two alkyl carboxylates namely sodium octanoate (Na-Octa) and sodium dodecanoate (Na-Dodeca) have been studied as corrosion inhibitors for X60 steel in 0.5 M HCl solution using theoretical calculations, weight loss and electrochemical methods. A density functional theory (DFT) approach was first utilized to calculate their electronic properties to e...
Article
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...