不同铝含量热镀锌合金化镀层的电解剥离实验  

Electrolytic stripping of galvannealed coatings with different aluminum contents

作　　者：袁训华[1] 仲海峰 朱利明[3] 李宁 江社明[1] 俞钢强 张启富[1] 

机构地区：[1]钢铁研究总院先进金属材料涂镀国家工程实验室,北京100081 [2]新冶高科技集团有限公司,北京100081 [3]国家知识产权局专利局专利审查协作北京中心,北京100190

出　　处：《材料热处理学报》2013年第7期175-180,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(51071052);国家"十二五"科技支撑项目(2012BAJ13B03);北京市科技计划项目(D07010300700702)

摘　　要：电解剥离试验是一种定量分析热镀锌合金化镀层相结构的方法,但电解剥离的试验数据不能直接确定合金化镀层中的Fe-Zn相结构,需要考虑试验过程中产生的各种电化学副反应的影响,本文优化了电解剥离分析合金化镀层相结构的试验参数。结果表明:在足够低的电位扫描速度下,电解剥离试验可以使合金化镀层中的各相逐相溶解,能够准确分析合金化镀层中的铁含量和η、ζ、δ、Γ等相的厚度。利用电解剥离试验测得的极化曲线和提出的数据分析方法结合各相的初始溶解电位准确测量了铝含量不同的热镀锌合金化镀层中各相的厚度和含量。The electrolytic stripping technique（also known as coulometric dissolution） was a method to analysis the phase structure of galvannealed coating quantitatively,but the experimental data of electrolytic stripping cannot be used straightforwardly for Fe-Zn phase identification,and because the quantification needs to take into account the effect of various electrochemical side-reactions.The applicability of electrolytic stripping for the phase analyzing of galvannealed coatings was optimized in this article.The results show that electrolytic stripping technique can be applied to realize step-by-step dissolution of various species of phases in the galvannealed coatings under the condition that the potential scanning rate is low enough,and the method allows the determination of the total Fe concentration,and the thickness of the η,ζ,δ and Γ phases.Both the thickness and the various intermetallic phases content of the galvannealed coatings with different aluminum contents was characterized by the polarization curves obtained using the electrolytic stripping technique and the proposed data analysis method,and combining the initial dissolution potential of every Fe-Zn phase in galvannealed coatings.

关 键 词：热镀锌合金化镀层 铝含量 电解剥离 相结构 Fe-Zn金属间化合物 

分 类 号：TG174.44[金属学及工艺—金属表面处理]