期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：1
页码：244-258
出版社：University of Mohammed Premier Oujda
摘要：The inhibitive action of some Benzimidazolone derivatives, namely 1, 3-dihydro-2H-benzimidazol-2-one (BI 1 ) and 1- (prop-2-en-1-yl)-1,3-dihydro-2H-benzimidazol-2-one (BI 2 ) against the corrosion of C38 steel in molar hydrochloric acid solution has been investigated using weight loss measurements, Tafel polarization and electrochemical impedance spectroscopy (EIS) techniques. Results obtained reveal that these derivatives perform excellently as corrosion inhibitors for mild steel in HCl 1M solution, its inhibiting efficiency reaches 92 % for BI 1 and 95% for BI 2 at 10 . 3 M. Polarization measurements showed that BI 1 is considered as an inhibitor of predominant anodic effect, but BI 2 act essentially as a mixed type inhibitor with anodic predominance at 10 -3 M. The temperature effect on the corrosion behavior of mild steel in 1 M HCl with and without BI 1 and BI 2 at different concentrations was studied in the temperature range from 303 to 333 K. E% remains the same even at high temperature for BI1 and BI 2 at 10 -3 M . The adsorption free energy and activation parameters for the mild steel dissolution reaction were determined. Both products are adsorbed on the mild steel surface according to a Langmuir isotherm adsorption model. Surface morphologies of sample were presented through scanning electron microscope (SEM).
