Thiopyrimidine derivatives as new and effective corrosion inhibitors for mild steel in hydrochloric acid: Electrochemical and quantum chemical studies
Thiopyrimidine derivatives as new and effective corrosion inhibitors for mild steel in hydrochloric acid: Electrochemical and quantum chemical studies
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DOI：
10.1016/j.jtice.2015.10.033
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发表时间：
2016-03
影响因子：
5.7
通讯作者：
Priyanka Singh;Ambrish Singh;M. Quraishi
中科院分区：
文献类型：
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作者：
Priyanka Singh;Ambrish Singh;M. Quraishi
The corrosion inhibition properties of thiopyrimidines derivativesviz.5-cyano-6-phenyl-2-thioxo-2,3-dihydropyrimidin-4-one (TP-1), 5-cyano-2-thioxo-6-(p-tolyl)-2,3 dihydropyrimidin-4-one (TP-2), 5-cyano-6-(4-methoxyphenyl)-2-thioxo-2,3-dihydropyrimidin-4-one (TP-3), 6-(4-(dimethylamino)phenyl)-5-cyano-2-thioxo-2,3-dihydropyrimidin-4-one (TP-4) were investigated as corrosion inhibitors by weight loss,electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods. Among all thiopyrimidines TP-4 exhibited maximum efficiency of 97% at 200 mg L−1. The results of electrochemical studies revealed that all four TPs were adsorbed on the metal surface by adsorption mechanism and behave as mixed type inhibitors with predominant control on cathodic reaction. The SEM-EDS/AFM/XPS methods were used to corroborate the mechanism of inhibition.
