The corrosion of pure Mg accelerated by haze pollutant ammonium sulphate
By Cao, Fuyong; Zhao, Chen; Song, Guang-Ling; Zheng, Dajiang
Published in Corrosion Science
2019
Abstract
The corrosion behavior of pure Mg in NH4+-containing alkaline solutions was studied by immersion test, electrochemical methods, morphology observation and corrosion product analysis. The results showed that the corrosion of Mg was dramatically accelerated by NH4+, resulting in a thick and loose Mg(OH)2 corrosion product film formed in the NH4+ containing alkaline solutions. It was proposed that the NH4+ could dissolve the relatively protective MgO layer in the corrosion product film, providing a path for the solution to reach the substrate and facilitating the corrosion of Mg.
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