WC-Zn复合镀层的工艺设计及其性能研究  

Electrodeposition and Performance of WC-Zn Composite Coatings on Q235 Carbon Steel

作　　者：李祥东 刘昌昊 张弛 陈文娟 崔宸悦 朱勇文 王姝舒 LI Xiangdong;LIU Changhao;ZHANG Chi;CHEN Wenjuan;CUI Chenyue;ZHU Yongwen;WANG Shushu(School of Materials Science and Engineering,Heifei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《中国腐蚀与防护学报》2025年第3期795-802,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：大学生创新创业项目(S202310359317);安徽鼎旺环保材料有限公司项目(W2020JSKF0565)。

摘　　要：通过改变电极位置及温度优化电镀工艺在Q235钢表面进行了WC-Zn复合电镀,旨在提高钢铁基体的耐腐蚀性和力学性能。并利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、硬度测量以及电化学测试的手段分析了涂层表面的形貌、结构以及电化学特性。结果表明,与常规左右电镀相比,上下电镀的方法可以大幅提高复合镀层中WC微粒的含量,在提高电解液温度时,上下电镀方法形成的镀层中WC含量有明显升高。其中在温度为60℃时,镀层中WC含量高达43.2%,且镀层表面WC微粒分布均匀。此外,WC微粒的掺入提高了镀层的硬度,且随着WC-Zn复合镀层中WC含量的升高电极的自腐蚀电流密度逐渐降低。S Electro-galvanizing is one of the most widely used methods in the field of corrosion prevention for steels,but during the service,the galvanized layer is prone to friction and wear.This article attempts to optimize the plating process by adjusting the electrode layout and bath temperature,thereby,novel WC-Zn composite coatings were then electrodeposited on the surface of Q235 steel,aiming in the improvement of the corrosion resistance and friction-wear property of the steel substrate.Meanwhile,the morphology,structure,and electrochemical characteristics of the acquired coatings were characterized by means of scanning electron microscopy(SEM),X-ray diffraction(XRD),hardness measurement,and electrochemical testing.The results showed that compared with conventional left and right electroplating,the up and down electroplating method can significantly increase the content of WC particles in the composite coating.When the increasing electrolyte temperature,the WC content in the coating formed by the up and down electroplating method is significantly increased.At 60 o C,the WC content in the coating is as high as 43.2%,while the WC particles were uniformly distributed on the surface of the coating.In addition,the addition of WC particles improves the hardness of the coating,and the free-corrosion current density of the electrode of WC-Zn/Q235 steel gradually decreases with the increase of WC content in the WC-Zn composite coating.

关 键 词：WC-Zn复合涂层 电镀 电化学 耐磨性 

分 类 号：TG171[金属学及工艺—金属表面处理]