铝合金表面抗腐蚀薄膜的制备及性能研究  

Preparation and Properties of Anti-corrosion Film on Surface of Aluminum Alloy

作　　者：石阳阳[1] 程广贵[1] 张忠强[1] 丁建宁[1,2] 郭立强[1] 张伟[1] 凌智勇[1] 

机构地区：[1]江苏大学,江苏镇江212013 [2]常州大学,江苏常州213164

出　　处：《稀有金属材料与工程》2016年第4期952-956,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51005103;11102074)

摘　　要：采用分子自组装方法在铝合金表面制备了3-氨基丙基三乙氧基硅烷(KH550)膜、KH550/氧化石墨烯(GO)复合薄膜。借助扫描电子显微镜(SEM)、拉曼光谱仪(Raman)和傅里叶红外光谱仪(FTIR)表征了样品表面形貌和微结构,通过电化学工作站测试了样品腐蚀电位和腐蚀电流密度。结果表明:KH550的氨基(-NH2)与GO的羧基(-COOH)发生缩合反应,使KH550与GO成功接枝。KH550硅烷膜和KH550/GO复合薄膜与铝合金发生了化学反应,生成了Si-O-Al键,增加了薄膜粘附力;同时2种薄膜均有效提高了铝合金抗腐蚀性。3-Triethoxysilylpropylamine（KH550） film and KH550/graphene oxide（GO） composite film were prepared on aluminum alloy by Self-Assembly Moleculars（SAM）. Surface morphology and microstructure of the samples were characterized by SEM, Raman and FITR. Corrosion potential and current density of the samples was also tested by the electrochemical workstation. The results show that a condensation reaction takes place between amino groups（-NH2） of KH550 and carboxy groups（-COOH） of GO, which makes success combination of KH550 and GO. The adhesion ability of the film is enhanced due to Si-O-Al linkage generated by the chemical reaction between the film and aluminum alloy. Moreover, the corrosion resistance of aluminium alloy is effectively improved by the two kinds of films.

关 键 词：铝合金 硅烷偶联剂 氧化石墨烯 分子自组装 抗腐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]