期刊
JOURNAL OF MAGNESIUM AND ALLOYS
卷 5, 期 3, 页码 320-325出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jma.2017.08.005
关键词
Mg alloy; Mg; Al hydrotalcite film; Ce-containing solution; Sealing treatment; Corrosion resistance
资金
- National Natural Science Foundation of China [51701093]
- Natural Science Foundation of Jiangsu Province [BK20170764]
- Six Talent Peaks [2015-XCL-025]
- Qing Lan Project of Jiangsu Province
- Practice Innovation Program for graduate students of Jiangsu Province [SJZZ16_0292]
- Research Fund of Nanjing Institute of Technology [JCYJ201603]
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. (C) 2017 Production and hosting by Elsevier B.V. on behalf of Chongqing University.
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