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Rami K. Suleiman 한국부식방식학회 2019 Corrosion Science and Technology Vol.18 No.5
The sol-gel methodology has been applied successfully in the synthesis of a novel hybrid coating basedon dimethoxymethyl-n-octadecylsilane precursor. The newly synthesized parent coating was functionalizedfurther with two commercially-available corrosion-inhibitive pigments Moly-white® 101-ED and HfucophosZapp®, applied to mild steel panels, and immersed continuously in 3.5% NaCl electrolytic solution for288 h. The corrosion protection performance of the prepared functional coatings was evaluated usingelectrochemical impedance spectroscopy (EIS) and DC polarization techniques. An enhancement in the barrierproperties has been revealed from the electrochemical characterization data of the hybrid films, in comparisonwith untreated mild steel substrates following long-term immersion in 3.5% NaCl. The corrosion resistanceproperties of the newly developed coatings over mild steel substrates found to be largely dependent onthe type of the loaded inhibitive pigment in which the Moly-white inhibitor has a positive impact on thecorrosion protection performance of the parent coating, while an opposite behavior was observed upon mixingthe base polymeric matrix with the commercially-available Zapp corrosion inhibitor.
Mohammad Mizanur Rahman,Rami Suleiman,김한도 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.9
A series of waterborne polyurethane/functionalized multiwalled carbon nanotube (WBPU/f-MWCNT) nanocomposite dispersions was prepared using three defined concentrations of 0.5, 1.0 and 2.0 wt% carboxyl functionalized multiwalled carbon nanotubes (f-MWCNTs). All dispersions were coated on mild steel and exposed under natural weather condition for a maximum of 365 days. Both exposed and unexposed coatings were characterized by potentiodynamic polarization (PDP) and X-ray photoelectron spectroscopy (XPS) analyses. The pristine WBPU coating showed slight degradation and corrosion protection. Inclusion of a higher content of f-MWCNTs significantly improved both the degradation and corrosion protection efficiencies of the coatings. Maximal degradation and corrosion protection was observed when 2.0 wt% f-MWCNT was mixed with WBPU for all of the coatings.
I.B. Obot,S.A. Umoren,Z.M. Gasem,Rami Suleiman,Bassam El Ali 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Corrosion inhibition potentials of two imidazole derivatives namely, vinylimidazole (VI) andallylimidazole (AI) for carbon steel in 1M HCl at 25 C were predicted theoretically using quantumchemical calculations and molecular dynamics (MD) simulations. DFT calculations indicated that VI ismore reactive towards steel surface than AI. Equilibruim adsorption behaviour of VI and AI molecules onFe2O3 (010) surface was investigated using molecular dynamics (MD) simulations. The equilibriumadsorption energy followed the order: VI > AI. Theoretical conclusions were subsequently validatedexperimentally using potentiodynamic polarization, linear polarization resistance, electrochemicalimpedance spectroscopy, and surface analytical techniques (SEM and AFM).
Saviour A. Umoren,Moses M. Solomon,Ime B. Obot,Rami K. Suleiman 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.76 No.-
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. Inrecent years, numerous research works have been undertaken on plant biomaterials as metals corrosioninhibitor in different corrosive media. This review critically looks at the researches done in the years2013–2018. Corrosive environments covered include acidic, basic, neutral, aqueous, geothermalfluid andartificial saliva. The majorfindings and the mechanism of inhibition has been elucidated. The missing gapin this area of research has been pointed out and future direction proposed.
Progress in the development of sour corrosion inhibitors: Past, present, and future perspectives
Bio-Composites,Moses M. Solomon,Saviour A. Umoren,Rami Suleiman,Mohamed Elanany,Nayef M. Alanazi,Ahmad A. Sorour 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.79 No.-
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 corrosioninhibitors is one of the most economical and reliable approaches to control the corrosion of oil and gasmetallic facilities. This paper looks at the progress made in the development of sour corrosion inhibitorsfrom early 1900 to date. Scientific literatures were reviewed. The review identified four classes of organiccorrosion inhibitors for sour environments, namely, amine-based, imidazoline-based, polymer-based,and Gemini-surfactant-based inhibitors. The strengths and weaknesses of these inhibitors werehighlighted. The review revealed that the patronage of amine-based chemistries has declined, and thecurrent technology is based on imidazoline and quaternary salt chemistries. The existing knowledge gapand the future research direction in the area of sour corrosion inhibitors development have beenhighlighted.
( H. Hachelef ),( R. Mehdaoui ),( K. Hachama ),( M. Amara ),( A. Khelifa ),( A. Benmoussat ),( M. Hadj Meliani ),( Rami K. Suleiman ) 한국부식방식학회 2023 Corrosion Science and Technology Vol.22 No.5
The aim of the present study was to investigate the effect of thymus extract on corrosion inhibition of aluminum 5083 alloy in a 0.1 M NaCl medium prepared using a mixture of ethylene glycol and water using potentiodynamic and electrochemical impedance spectroscopy (EIS) techniques. The potentiodynamic electrochemical technique showed an increase in corrosion inhibition efficiency starting from 49.63% at a concentration of 0.25 g/L to 92.71% at a maximum concentration of 1.25 g/L of the extract. These results were consistent with those obtained via EIS analysis. Spectral characterization of the tested plant extract using the Fourier-transform infrared spectroscopy (FTIR) technique confirmed the presence of organic compounds having different oxygen and aromatic functionalities in the extract that could help enhance the adsorption of these compounds on the aluminum surface. This study reveals possible adsorption isotherm of the thymus extract on the aluminum surface, supporting a Langmuir isotherm for the adsorption of inhibitor molecules on this surface.