The influence of Mg addition on the corrosion behavior of Zn-x%Mg (x = 0.5, 1.5 and 3) alloys in saturated Ca(OH)₂ solution was investigated with pure zinc as a reference. The Zn-Mg alloys were passivated but less resistant to corrosion. Mg alloying caused more negative corrosion potential of the Zn-Mg alloys and inhomogeneity of the passivation layer. Alternately preferential dissolution of the primary Zn-rich dendrites (PZD) and Zn-Mg eutectics (ZME) regions was observed. This was probably linked to the galvanic coupling between the PZD and ZME regions, and/or the Mg-rich passivation layer less resistant to corrosion than the Ca-rich passivation layer.

以纯锌为参比，研究了Mg添加对Zn-x％Mg（x = 0.5、1.5和3）合金在饱和Ca（OH）₂溶液中的腐蚀行为的影响。Zn-Mg合金是钝化的，但耐腐蚀性能较差。镁合金化导致Zn-Mg合金具有更大的负腐蚀潜能以及钝化层的不均匀性。观察到主要富锌树突（PZD）和Zn-Mg共晶（ZME）区域的交替优先溶解。这可能与PZD和ZME区域之间的电流耦合有关，和/或与富含Ca的钝化层相比，富含Mg的钝化层的耐腐蚀性更差。