Adsorption and corrosion-inhibiting effect of Dacryodis edulis extract on low-carbon-steel corrosion in acidic media.
The inhibition of low-carbon-steel corrosion in 1M HCl and 0.5M H(2)SO(4) by extracts of Dacryodis edulis (DE) was investigated using gravimetric and electrochemical techniques. DE extract was found to inhibit the uniform and localized corrosion of carbon steel in the acidic media, affecting both the cathodic and anodic partial reactions. The corrosion process was inhibited by adsorption of the extracted organic matter onto the steel surface in a concentration-dependent manner and involved both protonated and molecular species. Molecular dynamics simulations were performed to illustrate the process of adsorption of some specific components of the extract.
Oguzie
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Electrochemistry and Materials Science Research Laboratory, Department of Chemistry, Federal University of Technology Owerri, PMB 1526, Owerri, Nigeria. oguziemeka@yahoo.com
Enenebeaku
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CK
Akalezi
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Okoro
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SC
Ayuk
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Ejike
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D000143:Acids / Q000737:chemistry; D000327:Adsorption; D000470:Alkaloids / Q000737:chemistry; D001205:Ascorbic Acid / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D003343:Corrosion; D004563:Electrochemistry; D029624:Ferns / Q000737:chemistry*; D056004:Molecular Dynamics Simulation; D010936:Plant Extracts / Q000737:chemistry*; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes / Q000737:chemistry; D013232:Steel / Q000737:chemistry*
D000143:Acids; D000470:Alkaloids; D010936:Plant Extracts; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; D013232:Steel; D002244:Carbon; C024714:caryophyllene; D001205:Ascorbic Acid