<strong>WC-Zn</strong>复合镀层的工艺设计及其性能研究

doi:10.11902/1005.4537.2024.131

中国腐蚀与防护学报

2025, Vol. 45

Issue (3): 795-802 CSTR: 32134.14.1005.4537.2024.131 DOI: 10.11902/1005.4537.2024.131

研究报告

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WC-Zn复合镀层的工艺设计及其性能研究

李祥东, 刘昌昊, 张弛, 陈文娟(

), 崔宸悦, 朱勇文, 王姝舒

合肥工业大学材料科学与工程学院合肥 230009

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

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

引用本文:

李祥东, 刘昌昊, 张弛, 陈文娟, 崔宸悦, 朱勇文, 王姝舒. WC-Zn复合镀层的工艺设计及其性能研究[J]. 中国腐蚀与防护学报, 2025, 45(3): 795-802.
Xiangdong LI, Changhao LIU, Chi ZHANG, Wenjuan CHEN, Chenyue CUI, Yongwen ZHU, Shushu WANG. Electrodeposition and Performance of WC-Zn Composite Coatings on Q235 Carbon Steel[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(3): 795-802.

全文: PDF(10307 KB) HTML

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。

关键词 ： WC-Zn复合涂层, 电镀, 电化学, 耐磨性

Abstract：

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 ℃, 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.

Key words： WC-Zn composite coating electroplating electrochemistry wear resistance

收稿日期: 2024-04-22 32134.14.1005.4537.2024.131

ZTFLH:

TG171

基金资助: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)

通讯作者: 陈文娟，E-mail：wjchen314@hfut.edu.cn，研究方向为金属腐蚀与防护

Corresponding author: CHEN Wenjuan, E-mail: wjchen314@hfut.edu.cn

作者简介: 李祥东，男，2002年生，本科生

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https://www.jcscp.org/CN/10.11902/1005.4537.2024.131 或 https://www.jcscp.org/CN/Y2025/V45/I3/795

图1 阴阳两极采用左右、上下位置复合电镀示意图

图2 左右、上下电镀时WC-Zn电镀层的XRD谱

图3 60 ℃时上下、左右电镀形成的WC-Zn复合镀层的表面形貌及W分布

图4 60 ℃时上下、左右电镀形成的WC-Zn复合镀层的截面形貌

图5 60 ℃时上下、左右电镀形成的WC-Zn复合镀层腐蚀12 h的SEM图

图6 镀覆Zn和WC-Zn镀层的Q235钢经不同时间腐蚀后的阻抗模量和相位角

图7 镀覆Zn和WC-Zn镀层的Q235钢电极经不同时间腐蚀后的极化曲线

图8 不同腐蚀时间电极的腐蚀电流密度曲线

表1 不同电镀方式下样品的布氏硬度

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