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OALib Journal期刊
ISSN: 2333-9721
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电弧离子镀CrN涂层盐雾腐蚀行为
DOI: DOI:10.3724/SP.J.1037.2009.00759, PP. 600-606
Keywords: CrN,电弧离子镀,盐雾腐蚀,动电位极化曲线
Abstract:
采用电弧离子镀技术在38CrA调制钢上制备CrN涂层,分析了涂层的组织及结构,研究了工艺参数对CrN涂层中性盐雾腐蚀性能的影响.结果表明3组不同工艺的CrN涂层均由fcc-CrN,hcp-Cr2N以及bcc-Cr相组成;在N2压强较低时,CrN相表现为{100}择优取向,N2压强较高时,则表现为{110}择优取向.在高偏压低N2压强下沉积的CrN涂层结构致密,残余应力和孔隙率最小,具有最佳的抗盐雾腐蚀性能.通过扫描电子显微镜分析盐雾腐蚀后样品的表面腐蚀产物,并结合极化曲线测量结果,对其盐雾腐蚀机理进行了探讨.
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