Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    Special 1    October 2012

[PDF Download]        

    

Novel multilayer Mg−Al intermetallic coating for corrosion protection of magnesium alloy by molten salts treatment
HE Mei-feng1, HU Wen-bin2, ZHAO Su3, LIU Lei2, WU Ya-ting2

1. School of Materials Science and Engineering, University of Shanghai for Science and Technology,
Shanghai 200093, China;
2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;
3. School of Mechanical Engineering, Shanghai Dianji University, Shanghai 200240, China

Abstract:A novel multilayer Mg−Al intermetallic coating on the magnesium alloy was obtained by AlCl3−NaCl molten salt bath treatment. The molten salt was treated at 400 °C, which is lower than the treatment temperature of solid diffusion Al powder. The thick Al12Mg17, Al0.58Mg0.42 and Al3Mg2 multilayer Mg−Al intermetallic coating forms on the magnesium alloy. The corrosion resistance of AZ91D alloy with and without coating by multilayer of Mg−Al intermetallic compound was evaluated by electrochemical impedance spectroscopy measurements in 3.5% (mass fraction) NaCl solution. The polarization resistance value of the multilayer coating on the magnesium alloy by molten salt bath treatment is greater than that of the uncoated one, which is attributed to the homogenously distributed intermetallic phases.

 

Key words: Mg−Al intermetallic coating; multilayer; diffusion; corrosion; magnesium alloy; molten salt treatment

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com