Effect of solution concentration on sealing treatment of Mg-Al hydrotalcite film on AZ91D Mg alloy

Qiangsheng Dong; Zhixin Ba; Yongqiang Jia; Yongjun Chen; Xiaoyu Lv; Xiaobo Zhang; Zhangzhong Wang

Journal of Magnesium and Alloys (Sep 2017)

Effect of solution concentration on sealing treatment of Mg-Al hydrotalcite film on AZ91D Mg alloy

Qiangsheng Dong,
Zhixin Ba,
Yongqiang Jia,
Yongjun Chen,
Xiaoyu Lv,
Xiaobo Zhang,
Zhangzhong Wang

Affiliations

Qiangsheng Dong: School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China; Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, PR China
Zhixin Ba: School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China; Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, PR China; Corresponding author. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China.
Yongqiang Jia: School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China; Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, PR China
Yongjun Chen: School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China
Xiaoyu Lv: School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China
Xiaobo Zhang: School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China; Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, PR China
Zhangzhong Wang: School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China; Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, PR China

Journal volume & issue: Vol. 5, no. 3
pp. 320 – 325

Abstract

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Cerium-based sealing treatment was developed for Mg-Al hydrotalcite film on AZ91D Mg alloy, and the influence of cerium salt solution was investigated to modify the surface integrity and corrosion resistance. Scanning electron microscope (SEM) and X-ray diffraction (XRD) measurements were carried out to analyze the surface morphology and phase composition. The corrosion resistance of Mg-Al hydrotalcite film after sealing treatment was evaluated by the polarization curve and electrochemical impedance spectroscopy (EIS) tests. The results showed that lower concentration of Ce-containing solution was beneficial to seal the micro-cracks on Mg-Al hydrotalcite film, and improve the surface integrity and corrosion resistance; higher concentration of Ce-containing solution could seal fewer micro-cracks, and the corrosion resistance was decreased owing to the disintegration of Mg-Al hydrotalcite film. Keywords: Mg alloy, Mg-Al hydrotalcite film, Ce-containing solution, Sealing treatment, Corrosion resistance

Published in Journal of Magnesium and Alloys

ISSN: 2213-9567 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.keaipublishing.com/en/journals/journal-of-magnesium-and-alloys/

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