摘要
采用电镀方法在Q235低碳钢表面制备锌-镍合金镀层。为了进一步改善锌-镍合金镀层的耐蚀性,对其进行三价铬钝化处理。采用扫描电子显微镜、电化学工作站和盐雾试验,研究了钝化液pH值、钝化时间和钝化温度对钝化膜耐蚀性的影响,从而获得最佳的钝化工艺条件。结果表明:当钝化液pH值为1.1、钝化时间为20s、钝化温度为25℃时,钝化膜的耐蚀性最好,结合强度符合《金属材料弯曲试验方法》(GB/T 232—2010)的要求。
Zinc nickel alloy coating was prepared on the surface of Q235 low carbon steel by electroplating, and trivalent chromium passivation treatment was used to further improve the corrosion resistance of zinc nickel alloy coating. The effects of passivation solution pH value, passivation time and passivation temperature on the corrosion resistance of passivation films were investigated by electron scanning microscope, electrochemical workstation and salt spray test, and the optimal passivation process conditions were obtained. Results showed that the passivation film has the best corrosion resistance when passivation solution pH value was 1. 1, passivation time was 20 s and passivation temperature was 25℃. The bonding strength of the passivation film meet the requirements of the bending test method for metal materials （GB/T 232-2010）.
作者
马红雷
MA Honglei(Department of Mechanical and Electrical Engineering,Yongcheng Vocational College,Yongcheng 476600,China)
出处
《电镀与环保》
CAS
CSCD
北大核心
2018年第6期69-72,共4页
Electroplating & Pollution Control
基金
河南省科技厅重点科技攻关项目(162102210121)
关键词
钝化
耐蚀性
锌镍合金镀层
盐雾试验
passivation
corrosion resistance
zinc nickel alloy coating
salt spray test
