摘要
采用脉冲电镀技术在Q235钢表面制备Zn-Ni-Mn合金镀层。采用辉光放电光谱仪(GDS)、扫描电镜(SEM)、Tafel曲线和电化学阻抗谱(EIS)考察了占空比(10%~60%)对镀层元素含量、沉积速率、表面形貌及耐蚀性的影响。结果表明:随占空比的增大,镀层锌、镍含量升高,锰含量降低;沉积速率先升高后降低;占空比为20%时制备的镀层形貌致密,自腐蚀电流密度最小,电荷转移电阻最大,耐蚀性最好。
Zn-Ni-Mn alloy coatings were prepared on the surface of Q235 steel by pulse electroplating. The effects of duty cycle （ 10% - 60% ） on coating element content, deposition rate, surface morphology and corrosion resistance were investigated by glow discharge spectroscopy （GDS） , scanning electron mi- croscopy （SEM）, Tafel curve and electrochemical impedance spectroscopy （EIS）. The results showed that with the increase of duty cycle, Zn and Ni content increased while Mn content decreased. Deposition rate first increased and then decreased. Coatings prepared under the duty cycle of 20% had compact mor- phology, the smallest corrosion current density, the biggest charge transfer resistance and the best corrosion resistance.
出处
《电镀与精饰》
CAS
北大核心
2017年第11期1-4,共4页
Plating & Finishing
基金
国家自然科学基金资助项目(51474088)
