Cerium-Based Sealing Treatment of Mg–Al Hydrotalcite Film on AZ91D Magnesium Alloy

作     者：Qiang-Sheng Dong Zhi-Xin Ba Zhang-Zhong Wang Juan Kuang Zheng-Yang Cai Chen Yuan 

作者机构：School of Materials Science and Engineering Nanjing　Institute of Technology Nanjing 211167 China Jiangsu Key Laboratory of Advanced Structural Materialsand Application Technology Nanjing 211167 China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2016年第29卷第11期

页      面：993-1000页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology (No. ASMA201407) the Innovative Foundation Project for Students of Jiangsu Province (No. 201511276012Z) the Innovative Foundation Project for Students of Nanjing Institute of Technology (No. TB201617004) 

主　　题：AZ91D magnesium alloy Mg-Al hydrotalcite film Sealing treatment Ce-containing solution Corrosion resistance 

摘      要：An environment-friendly cerium-based sealing treatment was developed to improve the surface integrity and corrosion resistance of Mg–Al hydrotalcite film on AZ91D magnesium alloy. The cerium dioxide was generated through three stages namely nucleation, growth and dissolution, modifying the surface of AZ91D Mg alloy, and the hydrotalcite film became integral after being treated for 30 min. The results of polarization curves showed that the anti-corrosive performance of the hydrotalcite film was enhanced by the sealing treatment. Moreover, the immersion tests and electrochemical impedance spectrum measurements also demonstrated that the sealed hydrotalcite film provided a longer-term protection of magnesium alloy from corrosion as compared to the unsealed one.