AZ31镁合金表面浸锌过程中混合电势与覆盖度关系研究  

Relationship Between Mixed Potential and Coverage of Zinc-immersion on AZ31 Magnesium Alloy

作　　者：邓娟利[1] 赵晓莉 周传哲[3] 黎德育[3] 李宁[3] 

机构地区：[1]长安大学材料科学与工程学院,西安710064 [2]西安康本材料有限公司,西安710089 [3]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《材料工程》2012年第9期19-22,27,共5页Journal of Materials Engineering

摘　　要：采用电势-时间曲线、Tafel曲线、扫描电镜(SEM)研究了AZ31镁合金表面浸锌过程中锌结晶的形成及混合电势(Eg)与覆盖度(θ)关系。结果表明:镁合金基体与浸锌液接触瞬间,锌在镁合金上的覆盖率即可达到0.983,在浸锌400s之后,锌的覆盖率接近于1,浸锌反应达到平衡。同时求解出混合电势及覆盖率随浸锌时间的变化关系式,并探讨了AZ31镁合金表面浸锌过程。E-t curves, Tafel curves and SEM were applied to study the formation of zinc on AZ31 mag- nesium alloy in the process of zinc-immersion and the relationship between mixed potential （Eg） and coverage（0）. The results show that the coverage reaches 0. 983 at the instantaneous contact of AZ31 magnesium alloy and the zinc-immersion solutions, and up to above 1 after 400s immersion and the re- action reaches equilibrium. The relations between Eg and 0 were derived, and the mechanism of zinc- immersion on AZ31 magnesium alloy was discussed.

关 键 词：AZ31镁合金 浸锌 混合电势 覆盖度 机理 

分 类 号：TQ153.2[化学工程—电化学工业]