Galvalume在不同介质中腐蚀产物的形貌和成分分析对比及其对耐蚀性能的影响  

The Comparison of Structure and Composition of Corrosion Product for Galvalume in Different Solutions

作　　者：主沉浮[1] 魏云鹤[1] 于萍[1] 郭晓玉[2] 刘秀玉[1] 王蕾蕾[1] 崔巍[1] 张长桥[1] 

机构地区：[1]山东大学化学与化工学院,济南250061 [2]河南省中医学院,郑州450008

出　　处：《材料工程》2003年第8期20-22,共3页Journal of Materials Engineering

摘　　要：利用二次电子成像技术分析了Galvalume镀层在NaCl,Na2SO4以及NaCl+Na2SO4介质中腐蚀产物的形貌,并用X射线衍射技术分析了各种腐蚀产物的化学组成。结果表明,在NaCl介质中的腐蚀产物主要为结构疏松的晶态物质,对镀层基本无保护作用;而在Na2SO4以及NaCl+Na2SO4介质中的腐蚀产物主要为结构致密的非晶态物质,对镀层具有较强的保护作用,说明SO2-4的存在是形成致密非晶产物的根本原因。The structure and composition of Galvalume in different solutions such as NaCl, Na2SO4 and NaCl+Na2SO4 were studied by electron microprobe and Xray diffractometer respectively The results show that the corrosion product in NaCl solution is mainly crystal compound which is not protective to coating, the corrosion product in Na2SO4 and NaCl+Na2SO4 solution is mainly amorphous which is protective to coating So the amorphous structure is caused by the existence of SO2-4

关 键 词：Galvalume 腐蚀产物 X射线衍射技术 二次电子成像技术 

分 类 号：TG17[金属学及工艺—金属表面处理]