不同环境中HVOF喷涂WC-Ni和WC-Cr_(3)C_(2)-Ni涂层的耐腐蚀性能  

Corrosion Resistance of HVOF Sprayed WC-Ni and WC-Cr_(3)C_(2)-Ni Coatings in Different Environments

作　　者：蒋立鹤 蒋倩 黄云峰 谭志涛 王凯琳 洪晟[2] JIANG Lihe;JIANG Qian;HUANG Yunfeng;TAN Zhitao;WANG Kailin;HONG Sheng(Cosco Shipping Marine Equipment&Spares(Nanjing)Co.,Ltd.,Nanjing 211121,China;College of Mechanics and Materials,Hohai University,Nanjing 211100,China)

机构地区：[1]南京中远海运船舶设备有限公司,江苏南京211121 [2]河海大学力学与材料学院,江苏南京211100

出　　处：《热加工工艺》2023年第6期98-101,共4页Hot Working Technology

基　　金：国家重点研发计划资助项目(2019YFB2005300)。

摘　　要：利用超音速火焰(HVOF)喷涂技术制备了WC-Ni和WC-Cr_(3)C_(2)-Ni两种金属陶瓷涂层,并采用电化学工作站对涂层在不同环境中的耐腐蚀性能进行了表征。结果表明:WC-Ni涂层和WC-Cr_(3)C_(2)-Ni涂层在1mol·L^(-1)NaOH溶液的耐腐蚀性均低于在1mol·L^(-1)HCl溶液中的耐腐蚀性。WC-Ni涂层和WC-Cr_(3)C_(2)-Ni涂层在1mol·L^(-1)HCl和1mol·L^(-1)NaOH溶液中均产生钝化现象,涂层表面的钝化膜有助于其耐腐蚀能力的提升。WC-Ni涂层在1mol·L^(-1)HCl溶液的耐腐蚀性高于WC-Cr_(3)C_(2)-Ni涂层,而在1mol·L^(-1)NaOH溶液中耐腐蚀性低于WC-Cr_(3)C_(2)-Ni涂层。Two cermet coatings(WC-Ni and WC-Cr_(3)C_(2)-Ni)were prepared on Q235 steel substrate by HVOF spraying technology.The electrochemical workstation was used to characterize the corrosion resistance of the coatings in different environments.The results show that the corrosion resistance of WC-Ni coating and WC-Cr_(3)C_(2)-Ni coating in 1 mol·L^(-1)Na OH solution is lower than that in 1 mol·L^(-1)HCl solution.WC-Ni coating and WC-Cr_(3)C_(2)-Ni coating are passivated in 1 mol·L^(-1)HCl and 1 mol·L^(-1)Na OH solution.The passivation film on the coating surface is beneficial to improving the corrosion resistance of the coating.The corrosion resistance of WC-Ni coating in 1 mol·L^(-1)HCl solution is higher than that of WC-Cr_(3)C_(2)-Ni coating,while the corrosion resistance of WC-Ni coating in 1 mol·L^(-1)Na OH solution is lower than that of WC-Cr_(3)C_(2)-Ni coating.

关 键 词：超音速火焰喷涂 WC基涂层 耐腐蚀性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]