Influence of silane on corrosion resistance of magnesium alloy AZ31 with thermally sprayed aluminum coatings  

作　　者：ZENG Rongchang CHEN Jun KUANG Jun ZHANG Jin WANG Ying 

机构地区：[1]School of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400050, China [2]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Rare Metals》2010年第2期193-197,共5页稀有金属（英文版）

基　　金：supported by the Key Technologies Research & Development Program of Chongqing Science and Technology Commission (CSTC) (Nos. 2007AC4073 and 2009AB4008);the Natural Science Foundation of CSTC, China (No. 2008BB0063)

摘　　要：Aluminum coatings on Mg alloy AZ31 were fabricated using the thermal spraying technique, and then sealed with silane.The surface morphology and chemical groups were discerned using scanning electron microscopy and examined using Fourier transformation infrared spectroscopy, respectively.The salt fog tests and the potentiodynamic electrochemical technique were applied to evaluate the influence of silane on corrosion of the AZ31 alloy with aluminum coatings.The results showed that the corrosion resistance of the aluminum-coated AZ31 alloy was superior to that of the substrate.The aluminum coating sealed with various silane layers led to a further increase in the corrosion resistance of the alloy.Double silane layers were more corrosion-resistant than the single one.Also, it was no longer significant for more than two silane layers to improve the corrosion resistance.It implied that the optimum choice for silane treatment on the aluminum coatings was two layers.

关 键 词：magnesium alloy aluminum thermal spraying corrosion silane protection 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TM912.1[金属学及工艺—金属材料]