摘要
采用脉冲电镀法在Q235钢表面制备了Zn-Ni-Mn合金镀层。采用辉光放电光谱仪、扫描电镜、Tafel曲线和电化学阻抗谱,考察了复合光亮剂的体积分数对镀层的成分、沉积速率、表面形貌和耐蚀性的影响。结果表明:添加复合光亮剂能细化镀层表面晶粒,提高镀层的致密度和光泽度。随着复合光亮剂体积分数的增大,镀层中Zn和Ni的质量分数降低,Mn的质量分数升高;镀层的沉积速率先增大后减小;镀层的耐蚀性先提高后降低。当复合光亮剂的体积分数为10mL/L时,镀层具有最正的自腐蚀电位、最小的自腐蚀电流密度和最大的电荷转移电阻,耐蚀性最好。
Zn Ni Mn alloy coatings were prepared on the surface of Q235 steel by pulse electroplating. The effect of the volume fraction of composite brightener on the composition, electrodeposition rate, surface morphology and corrosion resistance was investigated by glow discharge spectroscopy, scanning electron microscopy, Tafel curve and electrochemical impedance spectroscopy. Results show that the composite brightener can refine the grains, and increase the density and glossiness of the coating. With the increasing of the volume fraction of composite brightener, the mass fraction ofZn andNiin the coating were decreased, while the mass fraction of Mn was increased. The electrodeposition rate was increased firstly and then decreased, and the corrosion resistance of the coating become better firstly and then worse. The coating prepared with 10 mL/L composite brightener has the highest self corrosion potential , the lowest self corrosion current density and the highest charge transfer resistance, exhibiting the best corrosion resistance.
作者
孟庆波
王心悦
刘海鹏
张志桐
李运刚
杨海丽
MENG Qingbo;WANG Xinyue;LIU Haipeng;ZHANG Zhitong;LI Yungang;YANG Haili(Key Laboratory of the Ministry of Education for Modern Metallurgy Technology,North China University of Science and Technology,Tangshan 063009,China)
出处
《电镀与环保》
CAS
CSCD
北大核心
2018年第6期26-30,共5页
Electroplating & Pollution Control
基金
国家自然科学基金资助项目--熔盐电解扩散制备碳钢/不锈钢功能梯度材料的基础研究(51474088)
