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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。
Electrolysis peel test is a method for quantitative analysis of the phase structure of hot-dip galvanized alloying coatings. However, the test data of electrolytic peel test can not directly determine the structure of Fe-Zn phase in alloying coatings. It is necessary to consider various electrochemical Side effects, this article optimizes the experimental parameters of electrolytic stripping alloy phase coating structure analysis. The results show that the electrolytic peel test can dissolve the phases in the alloyed coating phase by phase at a sufficiently low potential scanning speed and accurately analyze the iron content in the alloyed coating and the thickness of the phases η, ζ, δ, Γ . The thickness and content of each phase in the hot-dip galvanized alloying coatings with different aluminum contents were accurately measured using the polarization curves measured by the electrolytic peel test and the proposed data analysis method in combination with the initial dissolution potential of each phase.