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研究了Mg-1.5Zn-xCa(x=0.5,1.0)合金和Mg-1.5Zn-xMn(x=0.5,1.0)合金在Hank’s模拟体液中浸泡腐蚀32 d的腐蚀规律,并对上述两种合金的形貌进行分析。结果表明:Mg-1.5Zn-xMn(x=0.5、1.0)合金的显微组织由Mg-Zn、α-Mn和α-Mg相组成;Mg-1.5Zn-xCa(x=0.5、1.0)合金的显微组织由α-Mg、Mg-Zn、Mg_2Ca相组成。在Hank’s模拟体液中浸泡32d,Mg-1.5Zn-xCa(x=0.5、1.0)合金比Mg-1.5Zn-xMn(x=0.5、1.0)合金的表面腐蚀面积大,程度深。Mg-1.5Zn-xMn(x=0.5、1.0)合金比Mg-1.5Zn-xCa(x=0.5、1.0)合金的容抗弧半径大,腐蚀电位高,腐蚀电流密度小,因此Mg-1.5Zn-xMn(x=0.5、1.0)合金的耐蚀性能更好。
The corrosion rules of immersion corrosion of Mg-1.5Zn-xCa (x = 0.5,1.0) and Mg-1.5Zn-xMn (x = 0.5,1.0) alloys in Hank’s simulated body fluid for 32 d were studied. The morphology of the analysis. The results show that the microstructure of Mg-1.5Zn-xMn (x = 0.5,1.0) alloy consists of Mg-Zn, α-Mn and α-Mg phases; The microstructure consists of α-Mg, Mg-Zn and Mg-2Ca phases. The surface corrosion area of Mg-1.5Zn-xCa (x = 0.5,1.0) alloy is larger than that of Mg-1.5Zn-xMn (x = 0.5,1.0) alloy for 32 days in Hank’s simulated body fluid. The Mg-1.5Zn-xMn (x = 0.5,1.0) alloy has a larger resistance arc radius and higher corrosion potential than the Mg-1.5Zn-xCa (x = 0.5,1.0) alloy. The corrosion resistance of -xMn (x = 0.5, 1.0) alloy is better.