Corrosion and wear behavior of an Mg-2Zn-0.2Mn alloy in simulated body fluid
Corrosion and wear behavior of an Mg-2Zn-0.2Mn alloy in simulated body fluid
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Mg-2Zn-0.2Mn合金在模拟体液中的腐蚀磨损行为
DOI：
10.1007/s12598-013-0052-y
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发表时间：
2015-08-01
期刊：
影响因子：
8.8
通讯作者：
Chen, Min-Fang
中科院分区：
文献类型：
--
作者：
Liu, De-Bao;Wu, Bo;Chen, Min-Fang
本文研究了铸态和挤压时效处理的镁合金在模拟体液(SBF)中的腐蚀行为。采用销盘技术，以不锈钢为配位体，以去离子水为润滑剂，在2~5N的不同载荷下，研究了Mg-2ZN-0.2Mn合金的摩擦磨损行为。结果表明，与铸态合金相比，挤压时效处理后的Mg-2ZN-0.2Mn合金具有更好的耐腐蚀性能，这是因为合金的平均晶粒度更细小，相分布更均匀，气孔率更小。摩擦副在SBF和去离子水润滑条件下的摩擦系数明显低于干滑动条件下的摩擦系数。然而，由于SBF的腐蚀性加速了镁合金的磨损，所以在SBF润滑下，镁合金的磨损率高于干滑动和去离子水润滑。镁合金在不同的载荷和润滑条件下表现出不同的磨损机制。
In this work, the corrosion behavior of the as-cast and extrusion and aging treatment Mg-2Zn-0.2Mn alloy in simulated body fluid (SBF) were studied. The wear behavior of Mg-2Zn-0.2Mn alloy was investigated using pin-on-disk technique and stainless steel as counterbody under a constant sliding velocity at different loads ranging from 2 to 5 N with deionized water and SBF as lubrication. The results showed that the extrusion and aging treatment Mg-2Zn-0.2Mn alloy exhibited better corrosion resistance compared with the as-cast alloy due to finer average grain size, more homogeneous phase distribution, and decrease in porosity. The friction coefficient of fractional pair under SBF and deionized water lubrication were obviously lower than that of dry sliding condition. However, the wear rate of Mg-2Zn-0.2Mn alloy under SBF lubrication was higher than that of dry sliding and deionized water lubrication due to the corrosiveness of SBF accelerated the wear of the magnesium alloy. The magnesium alloy exhibited different wear mechanisms with the variety of loads and lubrication conditions.