Mg-Zn-Mn合金和Mg-Zn-Ca合金的组织及耐蚀性比较

发布时间：2018-07-26 12:04

【摘要】：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。
[Abstract]:The corrosion law of Mg-1.5Zn-xCa (XG) and Mg-1.5Zn-xMn (XG) alloys immersed in simulated body fluid of Hank's for 32 days was studied, and the morphology of the two alloys was analyzed. The results show that the microstructure of the Mg-1.5Zn-xMn (XY 0.5N 1.0) alloy consists of Mg-Zn, 伪 -Mn and 伪 -Mg phases. The microstructure of the Mg-1.5Zn-xCa (XMg-1.5Zn-xMn) alloy consists of 伪 -MgOMg-ZnGaMg2Ca phase. The surface corrosion area of 32dg Mg-1.5Zn-xCa (xP0.5N 1.0) alloy is larger than that of Mg-1.5Zn-xMn alloy (xP0.5N0. 0), and the corrosion resistance of Mg-1.5Zn-xMn (XY 0.5N 1.0) alloy is better than that of Mg-1.5Zn-xCa alloy (XY 0.51.0). The corrosion potential is high and the corrosion current density is low. Therefore, the corrosion resistance of Mg-1.5Zn-xMn (XY 0.5N 1.0) alloy is better than that of Mg-1.5Zn-xCa alloy (XG 0.5N 1.0). The corrosion resistance of Mg-1.5Zn-xMn alloy is better than that of Mg-1.5Zn-xCa alloy.
【作者单位】：内蒙古科技大学材料与冶金学院;
【分类号】：TG146.22;R318.08

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