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：

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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。