海洋工程用结构铝合金无铬化学转化膜耐腐蚀及涂装配套性能  

Corrosion Resistant and Paint Match Performance of Non-chromium Chemical Conversion Coating for Structural Aluminum Alloys Served in Marine Engineering

作　　者：刘斌[1] 

机构地区：[1]海军装备研究院,北京100161

出　　处：《中国表面工程》2014年第2期38-45,共8页China Surface Engineering

摘　　要：为改善服役于海洋环境下的结构铝合金的耐腐蚀性及其与底漆的配套性能,在两种典型海洋工程用结构铝合金(5083-H116和6061-T6)基体上制备了一种无铬钛/锆基化学转化膜———Alum-nanoceramic coating。采用扫描电子显微镜(SEM)和能谱仪(EDS)对膜层形貌及组成进行了表征,通过动电位极化曲线和电化学阻抗谱研究了膜层的电化学性能,利用中性盐雾试验及胶带剥离试验分别对膜层耐蚀性及其与环氧厚浆底漆的配套性进行了考察。结果表明:5083和6061铝合金Alum-nanoceramic无铬化学转化膜中性盐雾试验白锈面积达到5%所需时间分别为240h和168h;5083铝合金Alum-nanoceramic膜层比后者显示出更好的与环氧厚浆底漆的配套性能。The alumnanocermic coating, a novel Ti/Zr based nonchromium/phosphate chemical conversion coating, was made on two typical structural aluminum alloys used in marine environment： 5083H116 and 6061T6, to improve the corrosion resistance and paint match abilities of structural aluminum alloys served in the marine engineering. The scanning electron microscope （SEM） and energy dispersive spectrdmeter （EDS） were used to characterize coating morphologies and components. The electrochemical characterization was carried out by potentiodynamic polarization and electrochemical impedance spectroscopy. Neutral salt spray test and crosshatch tape test were used to evaluate the corrosion resistance and paint match ability combined with the high build epoxy primer. The test results show that the appearance time of the white rust less than 5% of the total area is more than 240 h for the AA 5083 alloy after alumnanoceramic treatment, and 168 h for AA 6061 alloy, respectively. Meanwhile, the primer match ability of AA 5083 alloy on the alumnanocermic coating reveals better than that of AA 6061 alloy.

关 键 词：无铬化学转化 铝合金 海洋工程 耐腐蚀 涂装配套 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TG172.5[金属学及工艺—金属学]