Article ID Journal Published Year Pages File Type
7893789 Corrosion Science 2018 12 Pages PDF
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.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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