FORMATION AND CORROSION RESISTANCE OF Mg-Al HYDROTALCITE FILM ON Mg-Gd-Zn ALLOY

被引：2
|
作者：
Ba, Z. X. [1 ,2 ]
Dong, Q. S. [1 ]
Kong, S. X. [1 ]
Zhang, X. B. [1 ,2 ]
Xue, Y. J. [1 ,2 ]
Chen, Y. J. [1 ]
机构：
[1] Nanjing Inst Technol, Sch Mat Sci & Engn, Nanjing 211167, Jiangsu, Peoples R China
[2] Jiangsu Key Lab Adv Struct Mat & Applicat Technol, Nanjing 211167, Jiangsu, Peoples R China
来源：
SURFACE REVIEW AND LETTERS | 2017年 / 24卷 / 01期
关键词：
Magnesium alloy; film; hydrotalcite; biocorrosion; AZ31 MAGNESIUM ALLOY; THERMAL-DECOMPOSITION; CONVERSION FILM; CO-AL; COATINGS; FLUORIDE;
D O I：
10.1142/S0218625X17500032
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
An environment-friendly technique for depositing a Mg-Al hydrotalcite (HT) (Mg6Al2(OH)(16)-CO3 center dot 4H(2)O) conversion film was developed to protect the Mg-Gd-Zn alloy from corrosion. The morphology and chemical compositions of the film were analyzed by scanning electronic microscope (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and Raman spectroscopy (RS), respectively. The electrochemical test and hydrogen evolution test were employed to evaluate the biocorrosion behavior of Mg-Gd-Zn alloy coated with the Mg-Al HT film in the simulated body fluid (SBF). It was found that the formation of Mg-Al HT film was a transition from amorphous precursor to a crystalline HT structure. The HT film can effectively improve the corrosion resistance of magnesium alloy. It indicates that the process provides a promising approach to modify Mg-Gd-Zn alloy.
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页数：8
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