两种助镀工艺热浸镀Galfan合金的比较  

Comparison of Hot-dipping Galfan Alloy Aided by Two Technics

作　　者：孙海燕[1] 马瑞娜[1] 范永哲[1] 杜安[1] 刘海[2] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130 [2]天津市工大镀锌设备有限公司,天津300130

出　　处：《热加工工艺》2007年第14期45-46,49,共3页Hot Working Technology

摘　　要：对化学助镀和电解助镀两种镀层样品做了显微组织比较、化学成分分析和中性盐雾试验。结果表明,两镀层具有相似的显微结构,过渡层很不明显,镀层是致密的共晶组织。在靠近基体1μm范围内,集中分布着富铝的过渡层;铁元素的含量在过渡层急剧减少,避免了脆性的锌铁金属间化合物的形成。但是化学助镀的过渡层有破裂迹象,并且镀层样品出现了漏镀。同时探讨了Galfan合金耐腐蚀性高于热镀锌的根本原因。The microstructure comparison, chemical composition analysis and neutral salt spray tests for two platings that are chemical plating and electroplating aiding were done.The results show that two plating layers have the similar microstructure and are the dense eutectic microtructure, the transition portion is not evident. The transition layers of abundant alumJnium are distributed in the region of l I^m; iron content reduces rapidly, so it avoids the forming of Fe-Zn intermetallic compound. But the transition portion of galfan coating aided by chemical plating has breach and the sample has bug. At the same time the real reason for good anti-corrosion of galfan alloy was discussed.

关 键 词：GALFAN合金 助镀 显微组织 成分分析 耐腐蚀性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]