Corrosion resistance of an amino acid-bioinspired calcium phosphate coating on magnesium alloy AZ31
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第14期
论文作者：Xiao-Li Fan Chang-Yang Li Yu-Bo Wang Yuan-Fang Huo Shuo-Qi Li Rong-Chang Zeng
文章页码：224 - 235
摘 要：An l-cysteine-bioinspired calcium phosphate（Ca-P） coating is prepared upon magnesium alloy AZ31 in a water bath at 60?C. FE–SEM, FTIR, XRD, electrochemical characterization, hydrogen evolution tests and XPS were used to evaluate the microstructure, chemistry and corrosion performance of the samples.Results indicate that l-cysteine promotes the nucleation process of the coating and significantly increases its thickness. This can be attributed to the complexation of the carboxyl group and mercapto group of l-cysteine with calcium ions. Indeed, the obtained Ca-P coating possesses higher corrosion resistance than that prepared in l-cysteine-free bath.
Xiao-Li Fan1，Chang-Yang Li1，Yu-Bo Wang1，Yuan-Fang Huo1，Shuo-Qi Li1，Rong-Chang Zeng1,2
1. Corrosion Laboratory for Light Metals, College of Materials Science and Engineering, Shandong University of Science and Technology2. School of Materials Science and Engineering, Zhengzhou University
摘 要：An l-cysteine-bioinspired calcium phosphate（Ca-P） coating is prepared upon magnesium alloy AZ31 in a water bath at 60?C. FE–SEM, FTIR, XRD, electrochemical characterization, hydrogen evolution tests and XPS were used to evaluate the microstructure, chemistry and corrosion performance of the samples.Results indicate that l-cysteine promotes the nucleation process of the coating and significantly increases its thickness. This can be attributed to the complexation of the carboxyl group and mercapto group of l-cysteine with calcium ions. Indeed, the obtained Ca-P coating possesses higher corrosion resistance than that prepared in l-cysteine-free bath.
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