Influence of KH-550 Silane Treatment on the Corrosion Resistance of AZ31 Magnesium Alloy
Silane treatment is an effective method of chemical conversion as a replacement for chromium treatments. In this paper, KH-550 silane treatment was adopted to improve the corrosion resistance AZ31 magnesium alloy. Hydrolysis process of KH-550 in the silane solutions was detected by the conductivity detection method. It was found that KH-550 silane could be hydrolyzed easily and its hydrolysis time was about 10 minutes. Polarization curve and salt immersion were carried out to investigate the corrosion behavior of the coated magnesium alloy treated by five kinds of silane solutions with different silane concentrations. When the concentration of KH-550 in the silane solution was 8％, the coated specimens by heating at 100℃ for half an hour after the surfaces dry had more excellent corrosion resistance than others. It was shown that the KH-550 silane treatment could form a -Si-O-M covalent bonded film/metal interface and -Si-O-Si siloxane chains to improve the corrosion resistance of coated magnesium alloy.
AZ31 Magnesium Alloy Silane Treatment Hydrolysis Process Conductivity Detection Corrosion Resistance
Wei ZHANG Fusheng PAN Mingbo YANG Jin ZHANG Tao WEN
College of Materials Science and Engineering, Chongqing Institute of Technology, China, 400050 Colle College of Materials Science and Engineering, Chongqing University, China,400045 College of Materials Science and Engineering, Chongqing Institute of Technology, China, 400050
国际会议
重庆
英文
927-930
2008-06-09（万方平台首次上网日期，不代表论文的发表时间）