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采用多弧离子镀在316不锈钢上沉积Cr Al N涂层,用X射线衍射仪(XRD)和扫描电子显微镜(SEM)表征涂层的成分和结构,纳米压痕和划痕仪分别测试涂层的硬度和结合力.通过球-盘往复式摩擦磨损试验机在海水环境下测试涂层腐蚀磨损性能,并用电化学工作站实时监测其摩擦过程中的电化学特性.结果表明:Cr Al N在有摩擦的条件下,涂层极化曲线的阳极区域存在较为明显的钝化区,抑制了涂层进一步腐蚀.在阳极电位下,涂层的摩擦系数随着加载电位的增加显著降低.随着加载电位的升高,涂层的磨损量也相应地增大.在阳极电位0.5 V下的磨损量是阴极电位–1 V下的2.99倍.在0 V时,磨损促进腐蚀的损失量,约占总损失量的13.71%.在–1 V,–0.5 V,–0.25 V,OCP,0 V下的磨损机理主要为磨粒磨损和塑性变形,而在0.25 V,0.5 V下的磨损机理主要为疲劳点蚀.
Cr Al N coatings were deposited on 316 stainless steel by multi-arc ion plating. The composition and structure of the coatings were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The coatings were tested by nanoindentation and scratch tester Hardness and cohesive force.The corrosion and wear properties of coatings were tested by a ball-plate reciprocating friction and wear tester in seawater environment and the electrochemical performance of the coating was monitored by electrochemical workstation in real time.The results show that Cr Al N Under the condition of friction, there is obvious passivation zone in the anode region of coating polarization curve, which inhibits further corrosion of the coating.At the anode potential, the friction coefficient of the coating decreases significantly with the increase of the loading potential. The increase of the loading potential increases the amount of wear of the coating accordingly.The amount of wear at the anode potential of 0.5 V is 2.99 times the cathode potential of -1 V. At 0 V, Accounting for 13.71% of the total loss. The wear mechanisms at -1 V, -0.5 V, -0.25 V, OCP and 0 V are mainly abrasive wear and plastic deformation, while the wear mechanisms at 0.25 V and 0.5 V are mainly Pitting for fatigue.