研究了热浸镀工艺对于镀层的微观结构的影响,利用扫描电镜(SEM)及能谱分析(EDX)观察了Zn-Al-Mg镀层表面以及截面的微观结构、合金层的形貌、镀层中各相的成分组成,利用辉光放电发射光谱仪(GDS)分析了镀层中各元素沿深度方向的分布,利用电子探针(EPMA)分析了镀层中各元素的分布,利用X射线光电子能谱(XPS)分析了镀层表面元素,利用X射线衍射(XRD)分析了镀层的相组成.结果表明,镀层中各元素沿镀层的深度方向的分布并不均匀,Mg在镀层表面富集,镀层组织呈现多相混合结构,以Zn晶粒、MgZn2与Zn组成的共晶为主,同时存在块状富铝相以及一层较薄的合金层.
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