恒电位对TiN涂层在人工海水环境中腐蚀磨损的影响

发布时间：2018-10-31 16:14

【摘要】：目的研究不同恒电位对TiN涂层在人工海水环境中腐蚀磨损行为的影响。方法用多弧离子镀系统在316不锈钢上沉积TiN涂层。通过XRD测试、纳米压痕硬度测试、膜基结合力测试、电化学工作站测试、不同恒电位下磨蚀实验和涂层的磨痕截面轮廓测试,分别评价TiN涂层的相结构、硬度、结合力、电化学性能、摩擦系数、磨损率,并通过扫描电子显微镜对涂层表面形貌、截面形貌和磨痕形貌进行分析。结果在摩擦条件下,TiN涂层的开路电位随着滑动摩擦时间的增加而逐渐降低。TiN涂层在不同恒电位(-1V、-0.5 V、OCP、0 V)下滑动摩擦,平均摩擦系数分别为0.392,0.416、0.324、0.348。磨损率分别为1.8117×10-6、3.1123×10-6、4.5958×10-6、7.7724×10-6 mm3/(N·m)。在0.5 V下,涂层被磨穿。TiN涂层在人工海水环境中的主要腐蚀磨损破坏机制为磨粒磨损和疲劳点蚀。结论提高加载电位,涂层的磨损量和磨损率同步增大。在-1、-0.5 V,OCP下,由腐蚀促进磨损的损失量占TiN涂层损失总量的比重逐渐增大,依次为0%、41.78%、61.77%。在0 V时,TiN涂层产生了由磨损促进腐蚀的损失量,占TiN涂层损失总量的比例为6.1%。
[Abstract]:Aim to study the effect of different constant potential on corrosion and wear behavior of TiN coating in artificial seawater. Methods TiN coating was deposited on 316 stainless steel by multi-arc ion plating system. The phase structure, hardness and adhesion of TiN coating were evaluated by XRD test, hardness test, adhesion test, electrochemical workstation test, abrasion test under different constant potential and the profile test of wear mark section of the coating. Electrochemical properties, friction coefficient, wear rate, and surface morphology, cross-section morphology and wear mark morphology of the coating were analyzed by scanning electron microscope (SEM). Results under friction conditions, the open circuit potential of TiN coating decreased gradually with the increase of sliding friction time. The TiN coating was subjected to sliding friction at different constant potential (-1 V ~ (-0.5) V). The average friction coefficient is 0.392U 0.416g 0.324g 0.348g respectively. The wear rates were 1.8117 脳 10-6, 3.1123 脳 10-6, 4.5958 脳 10-6, 7.7724 脳 10-6 mm3/ (N m)., respectively. The wear mechanism of TiN coating in artificial seawater environment is abrasive wear and fatigue pitting. Conclusion with the increase of loading potential, the wear rate and wear rate of the coating increase simultaneously. Under -1 ~ (-1) ~ (-0.5) V ~ (-1) V ~ (+) O _ (CP), the proportion of corrosion accelerated wear loss to the total loss of TiN coating increases gradually, which is in turn 0 ~ 41.78 and 61.7777. At 0 V, the loss of TiN coating was increased by wear, which accounted for 6.1% of the total loss of TiN coating.
【作者单位】：中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室浙江省海洋材料与防护技术重点实验室;西安工程大学纺织与材料学院;浙江纺织服装职业技术学院;
【基金】：国家973计划子课题(2014CB643302) 国家自然科学基金(51475449)~~
【分类号】：TG174.4

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