45#钢表面Ni-W/ZnO超疏水复合涂层的制备及性能研究  

Preparation and properties of Ni-W/ZnO superhydrophobic composite coating on 45#steel

作　　者：刘艳 冀杰[2] Liu Yan;Ji Jie(Department of Mechanical and Electrical Engineering,Henan Vocational College of Water Conservancy and Environment,Zhengzhou 450008,China;CET-College of Engineering and Technology,Southwest University,Chongqing 400715,China)

机构地区：[1]河南水利与环境职业学院机电工程系,河南郑州450008 [2]西南大学工程技术学院,重庆400715

出　　处：《电镀与精饰》2023年第5期26-33,共8页Plating & Finishing

基　　金：国家自然科学基金青年基金项目(61304189)。

摘　　要：采用电沉积工艺并结合喷涂法在45#钢表面制备Ni-W/ZnO超疏水复合涂层,表征了复合涂层的微观形貌和主要成分,并对复合涂层的疏水性、机械稳定性及耐蚀性进行测试分析。结果表明:复合涂层表面形成微纳米分级结构,主要成分为Ni、W、Zn、O、C和Si元素,改性ZnO颗粒在复合涂层中呈较均匀分散状态。复合涂层表面水滴接触角达到151.4°,表现出超疏水性能,并且经20次胶带提拉、20次砂粒冲击和20个周期砂纸摩擦后接触角仍然大于150°,能稳定地保持超疏水性能而且具有良好的机械稳定性。复合涂层还表现出优异的耐蚀性,其腐蚀电流密度仅为6.79×10^(-7)A/cm^(2),极化电阻达到3.25×10^(4)Ω·cm_(2),相比于常规Ni-W合金镀层,能为45#钢提供理想的腐蚀防护作用。Ni-W/ZnO superhydrophobic composite coating was prepared on the surface of 45#steel by electrodeposition technology in combination with spraying method.The microstructure and main composition of the composite coating were characterized,and its hydrophobicity,mechanical stability and corrosion resistance were tested and analyzed.The results show that the formation of a micro-nano hierarchical structure on the composite coating surface,primarily composed of six elements:Ni,W,Zn,O,C and Si.A relatively uniform dispersion state is observed among the modified ZnO particles in the composite coating.The water droplet contact angle on the composite coating surface reaches 151.4°,which demonstrates superhydrophobicity.Following 20 repetitions of tape pulling,falling sand impact and sandpaper friction,the contact angle is still more than 150°,which indicates that the composite coating has the ability to stably maintain superhydrophobicity and possesses mechanical stability.In addition,the composite coating exhibits excellent corrosion resistance,with a corrosion current density of just 6.79×10^(-7)A/cm^(2)and polarization resistance of 3.25×10^(4)Ω·cm^(2),providing ideal corrosion protection for 45#steel in comparison to conventional Ni-W alloy coating.

关 键 词：Ni-W/Zn 超疏水复合涂层 45#钢 电沉积 机械稳定性 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]