锻造CoCrMo合金关节材料的摩擦腐蚀行为

发布时间：2018-05-20 11:25

本文选题：CoCrMo合金 + 摩擦腐蚀　；参考：《摩擦学学报》2015年03期

【摘要】：采用UMT-2多功能摩擦磨损试验机和电化学工作站(CHI614E)考察了锻造Co Cr Mo合金在25%小牛血清溶液条件下的摩擦腐蚀性能,利用扫描电镜观察了摩擦腐蚀的形貌特征,对腐蚀损失量、机械磨损损失量及腐蚀和磨损的协同损失量进行了对比分析.结果表明:锻造Co Cr Mo合金的腐蚀电位(Ecorr)约-820 m V,在0.5~0.75 V区间出现二次钝化.不同载荷条件下,摩擦腐蚀的摩擦系数均大于纯摩擦系数,且随载荷的增加而减小,摩擦腐蚀电流则随载荷的增加而增大.随载荷的增加,机械磨损损失量所占比例增大,腐蚀损失量所占比例降低.摩擦腐蚀的协同损失量占到总损失量的30%以上,且随载荷增加而增大.
[Abstract]:The friction and corrosion properties of forged Co Cr Mo alloy under the condition of 25% calf serum solution were investigated by means of UMT-2 multifunctional friction and wear tester and electrochemical workstation CHI614E. The morphology of friction corrosion was observed by scanning electron microscope (SEM). The mechanical wear loss and the cooperative loss of corrosion and wear were compared and analyzed. The results show that the corrosion potential of forged Co Cr Mo alloy is about -820 MV, and the secondary passivation occurs in the range of 0.5 ~ 0.75 V. Under different loads, the friction coefficient of friction corrosion is higher than that of pure friction, and decreases with the increase of load, and the friction corrosion current increases with the increase of load. With the increase of load, the proportion of mechanical wear loss increases and the proportion of corrosion loss decreases. The synergistic loss of friction corrosion accounts for more than 30% of the total loss and increases with the increase of load.
【作者单位】：中国矿业大学材料科学与工程学院;
【基金】：国家自然科学基金项目(51275514) 清华大学摩擦学国家重点实验室开放基金项目(SKLTKF11A03)资助~~
【分类号】：TG146.16

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