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Correlations between the inhibition performances and the inhibitor structures of some azoles on the galvanic corrosion of copper coupled with silver in artificial seawater
Corrosion Science ( IF 8.3 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.corsci.2019.108413
Hualiang Huang , Furong Bu

Abstract The inhibition performances of benzimidazole (BI), 2-mercaptobenzimidazole (MBI) and benzotriazole (BTA) on the galvanic corrosion of copper coupled with silver in 3.5 wt.% NaCl solution have been investigated by electrochemical measurements, surface analysis, quantum chemical calculations and molecular dynamics simulations. The results demonstrate that the introduction of nitrogen atom and sulfhydryl group into benzimidazole molecule enhances the physisorption and chemisorption of inhibitors on the copper surface and improves the inhibition efficiency of inhibitors, while the galvanic effect between copper and silver reduces the inhibition efficiency of inhibitors. The difference of the inhibition performances of the three inhibitors is also elucidated.

中文翻译:

部分唑类化合物对人工海水中铜银电偶腐蚀的缓蚀性能与缓蚀剂结构的相关性

摘要 通过电化学测量、表面分析和量子化学计算研究了苯并咪唑 (BI)、2-巯基苯并咪唑 (MBI) 和苯并三唑 (BTA) 对铜和银在 3.5 wt.% NaCl 溶液中的电偶腐蚀的抑制性能。和分子动力学模拟。结果表明,苯并咪唑分子中氮原子和巯基的引入增强了抑制剂在铜表面的物理吸附和化学吸附,提高了抑制剂的缓蚀效率,而铜和银之间的电偶效应降低了缓蚀剂的缓蚀效率。还阐明了三种抑制剂抑制性能的差异。
更新日期:2020-04-01
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