载荷对n-SiC/Ni镀层腐蚀磨损协同作用的影响  

Effects of Loading on Corrosion-wear Synergism of Nickel-based Nanometer SiC Coatings

作　　者：陈晓磊[1] 吴斌[1] 刘洋[1] 白雪莲 张威[1] 

机构地区：[1]陆军军官学院,合肥230031

出　　处：《表面技术》2012年第2期82-85,共4页Surface Technology

摘　　要：对不同载荷下n-SiC/Ni镀层在5%H2SO4溶液中磨损试验进行了研究,通过电化学试验和失重法计算出腐蚀磨损质量损失中各分量的损失,结果表明,随着载荷的增加腐蚀磨损协同作用成为镀层失重的主要原因,并且协同作用中以腐蚀促进磨损为主。腐蚀磨损的极化曲线和表面微观形貌证实了载荷为100N和300N时,镀层在磨损过程中没有出现钝化膜;载荷为200N,镀层表面生成钝化膜,并且钝化膜在摩擦力作用下很快破裂,从而加速腐蚀,接着又形成新的钝化膜。The wear experiments of nickel-based nano-SiC coatings in 5%H2SO4 solution and under different loadings were studied.Each component of the weight loss of corrosive wear was calculated by using the electrochemical experiments and weight-loss method.The results show that synergism between the corrosion and wear is a main factor which affects the weight loss of coatings with increasing the applied loading,and corrosion promoting wear plays a key role during the synergism processing.When the applied loading of 100 N and 300 N are given,passivation films don＇t appear on the coatings during the wear processing;When the applied loading of 200 N is given,passivation films appear and they are broken quickly by friction,thus inducing corrosion,new films appear again,which is confirmed by polarization curves and surface micro-morphologies of corrosive wear.

关 键 词：纳米颗粒 镀层 腐蚀磨损 协同作用 

分 类 号：TQ153.2[化学工程—电化学工业] TH117[机械工程—机械设计及理论]