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Study of the inhibition ability of benzotriazole on the Zn-Mg coated steel corrosion in chloride electrolyte
Corrosion Science ( IF 7.4 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.corsci.2017.12.025
J. Rodriguez , M. Mouanga , A. Roobroeck , D. Cossement , A. Mirisola , M.-G. Olivier

Abstract The corrosion inhibition of Zn-Mg coated steel by benzotriazole was investigated in sodium chloride solution. Electrochemical and analytical measurements combined with surface analyses indicate that benzotriazole inhibits the corrosion reactions by forming a complex between Zn2+ and the anionic form of benzotriazole BTA− present near the surface where pH increases due to Mg dissolution. The complex reinforces the corrosion product layer composed of zincite ZnO which precipitates on the surface. If a benzotriazole/chloride ions ratio of 1/100 is respected and if the presence of the inhibitor is always maintained in the chloride medium, a sustainable barrier layer is assured.

中文翻译:

氯化物电解液中苯并三唑对锌镁镀层钢腐蚀抑制能力的研究

摘要 研究了苯并三唑在氯化钠溶液中对锌镁涂层钢的缓蚀作用。电化学和分析测量与表面分析相结合表明,苯并三唑通过在 Zn2+ 和存在于表面附近的阴离子形式苯并三唑 BTA- 之间形成络合物来抑制腐蚀反应,由于 Mg 溶解,该处 pH 值升高。该复合物加强了由沉淀在表面上的锌矿 ZnO 组成的腐蚀产物层。如果遵守 1/100 的苯并三唑/氯离子比率,并且如果抑制剂始终存在于氯化物介质中,则可以确保可持续的阻挡层。
更新日期:2018-03-01
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