热喷涂WC-17Co涂层摩擦磨损及电化学腐蚀性能研究  

Wear and Electrochemical Corrosion Performance of WC-17Co Thermal Sprayed Coatings

作　　者：程皓然 李学伟[1] 周长海[1] 孟银[1] 王鹏[1] 孙福久 

机构地区：[1]黑龙江科技大学材料科学与工程学院,黑龙江哈尔滨150022

出　　处：《中国钨业》2014年第4期35-38,共4页China Tungsten Industry

基　　金：哈尔滨市科技创新人才研究专项资金项目(2006RFQXG100)

摘　　要：利用大气等离子体喷涂在45钢表面制备WC-17Co涂层,综合评价了涂层的耐磨性及耐腐蚀性能。通过X射线衍射仪对涂层相成分进行了表征;对涂层室温滑动摩擦磨损性能及电化学腐蚀行为进行了测试。结果表明:制备态涂层中存在W2C脱碳相,W2C主要形成于热喷涂涂层过程;滑动摩擦磨损试验表明WC-17Co涂层具有优良的耐磨性能,在8 N载荷下滑动摩擦磨损25 min,其磨损量仅为0.088 g;在3种溶液中电化学腐蚀试验显示WC-17Co涂层在10%HCl溶液中的自腐蚀电位最高,为-254 mV,同时腐蚀速率也最大,达2.686E-1mm·a-1。The WC-17Co coatings were prepared by air plasma spraying technique on the substrate of steel 45. X-ray diffraction （XRD） was employed to examine the phase component of as-sprayed coatings. The wear and electrochemical corrosion tests were carried out. The results show that the as-sprayed coatings were consisted of W2C phase. The wear test confirmed that the WC-17Co coatings have better wear resistance. The electrochemical corrosion test shows that the self corrosion potential and the corrosion rate of WC-17Co coatings tested in 10%HCl was the biggest one in the three corrosion solutions.

关 键 词：大气等离子体喷涂 WC-17Co 摩擦磨损 电化学腐蚀 

分 类 号：TG174.4[金属学及工艺—金属表面处理]