Electrochemical Corrosion,Wear,and Tribocorrosion Behavior of Novel Ti-19Zr-10Nb-1Fe Alloy

新型Ti-19Zr-10Nb-1Fe合金的电化学腐蚀、磨损和腐蚀磨损行为

The electrochemical corrosion,wear,and tribocorrosion behavior of the novel Ti-19Zr-10Nb-1Fe alloy were investigated.The electrochemical corrosion analysis results show that the corrosion resistance of the Ti-19Zr-10Nb-1Fe alloy is better than that of the Ti-6Al-4V alloy under the test conditions in this research.Compared with the static electrochemical corrosion,the corrosion resistance of Ti-19Zr-10Nb-1Fe alloy during tribocorrosion decreases significantly,because the wear accelerates corrosion.The wear volume of Ti-19Zr-10Nb-1Fe alloy is increased with the increase in applied load whether the electrochemical corrosion occurs or not.Due to the acceleration effect of electrochemical corrosion,the wear volume caused by electrochemical corrosion is larger than that without electrochemical corrosion.The results of Wa/Wc are much greater than 10,indicating that during the tribocorrosion process,the material loss caused by mechanical wear is much larger than that caused by electrochemical corrosion.Through SEM observation of the wear morphologies of Ti-19Zr-10Nb-1Fe alloy after tribocorrosion,it can be inferred that the micro-abrasion is the main wear mechanism.The above results show that during the tribocorrosion process,the corrosion accelerates wear,and the wear accelerates corrosion.

研究了新型Ti-19Zr-10Nb-1Fe合金的电化学腐蚀、磨损和腐蚀磨损行为。电化学腐蚀测试结果表明,在本研究实验条件下,Ti-19Zr-10Nb-1Fe合金的耐腐蚀性能优于Ti-6Al-4V合金。与静态电化学腐蚀相比,由于磨损加速腐蚀,在腐蚀磨损过程中Ti-19Zr-10Nb-1Fe合金的耐腐蚀性能明显降低。不论是否存在电化学腐蚀,Ti-19Zr-10Nb-1Fe合金的磨损体积随着加载载荷的增加而增加。由于电化学腐蚀的加速作用,Ti-19Zr-10Nb-1Fe合金磨损体积要大于无电化学腐蚀条件下的磨损体积。Wa/Wc结果远大于10,这说明在腐蚀磨损过程中机械磨损造成的材料流失远大于电化学腐蚀造成的材料流失。通过SEM观察Ti-19Zr-10Nb-1Fe合金腐蚀磨损后的磨损形貌可知,在腐蚀磨损过程中磨损占据主导作用。综合上述结果表明,Ti-19Zr-10Nb-1Fe合金在腐蚀磨损过程中,腐蚀加速磨损,磨损加速腐蚀。