TC4在海水和酸雨中的腐蚀磨损交互作用研究

以GCr15/TC4为摩擦副，蒸馏水、人工海水和人工酸雨为腐蚀润滑介质，使用TRB3销-盘式摩擦磨损试验机研究不同水基介质对TC4合金磨蚀机制及腐蚀磨损交互作用的影响。结果表明：不同水基介质中TC4合金的磨损机制不同，海水中疲劳剥层最严重，蒸馏水中粘着磨损最明显，酸雨中磨粒磨损最显著，且海水和酸雨中的摩擦系数略低于蒸馏水。酸雨中磨痕的长度、宽度、深度均大于海水和蒸馏水；TC4合金磨损体积表现为酸雨>海水>蒸馏水，随循环次数增加呈线性增长。3种介质中TC4合金腐蚀磨损交互作用比率表现为酸雨>海水>蒸馏水趋势，蒸馏水中TC4材料流失由机械因素主导，海水和酸雨中则由腐蚀交互作用与机械因素主导；随着载荷增加蒸馏水中的腐蚀交互作用比率降低，机械因素对磨蚀的影响逐渐显著。

Synergistic between corrosion and wear of TC4 alloy in artificial seawater and artificial acid rain

The corrosive lubricanting environments that TC4 alloy being exposed can result in severe corrosion wear. Corrosion wear experiments were carried out to explore the corrosion and wear mechanisms of TC4 alloy, as well as the synergistic between corrosion and wear. In this experiment, distilled water, artificial acid rain, and artificial seawater were selected as corrosive lubricating media for the GCr15/TC4 friction counterpart. The Anton Paar TRB₃ tester were used for the experiments. The results suggest that the wear mechanisms of TC4 alloy in three water-based media are significantly different. Adhesive wear is most pronounced in distilled water, as well as fatigue delamination dominates in artificial seawater, however, abrasive wear is most significant in acid rain. The wear length, width, depth and volume of the wear profiles in acid rain are greater than those in artificial seawater and distilled water. The wear volume of TC4 alloy in artificial acid rain is larger than that in artificial seawater and distilled water, and it increased linearly with the number of cycles and normal loads. It shows that GCr15/TC4 is the most sensitive to acid rain, as well as suffers the most serious damage. In these three media, the synergistic factor of TC4 corrosion and wear in descending order is artificial acid rain, artificial seawater, and distilled water. The wear loss of TC4 alloy in distilled water is dominated by mechanical factors, while in artificial seawater and acid rain is dominated by corrosion-wear interaction and mechanical factors. The synergistic factor decreases as the load increases, and the influence of mechanical factors on corrosion wear becomes more significant.