Abstract

The activity of organoselenides as corrosion inhibitors for mild steel (MS) in 1.0 M hydrochloric acid was evaluated via electrochemical, surface examination and computational chemical methods. The results revealed that the corrosion inhibition percentage (% IE) of organoselenides reached more than 80% with little concentration. Tafel curves showed that organoselenides act as mixed-type inhibitors. EIS measurements indicated that organoselenides mitigate MS corrosion by adsorption on the surface. SEM and AFM analysis depicted the significant improvement in the MS surface in the presence of organoselenides, protecting the surface owing to the formation of an inhibitive film over the metallic surface. Also, DFT computations were conducted on the active form of the investigated compounds. Results from the practical experiments and theoretical calculations suggested that organoselenides are promising inhibitor candidates for corrosion of MS in 1.0 M hydrochloric acid.

中文翻译：

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酸性环境下有机硒化物对低碳钢的缓蚀性能及计算方法

摘要

通过电化学，表面检查和化学计算方法，评估了有机硒化物在1.0 M盐酸中作为低碳钢（MS）缓蚀剂的活性。结果表明，有机硒化物的腐蚀抑制率（％IE）几乎达到80％以上，且浓度很小。Tafel曲线表明，有机硒酸酯起混合型抑制剂的作用。EIS测量表明，有机硒化物通过吸附在表面上减轻了MS腐蚀。SEM和AFM分析显示，在有机硒化物的存在下，MS表面的显着改善，由于在金属表面上形成了抑制膜，从而保护了表面。同样，对所研究化合物的活性形式进行了DFT计算。