摘要
以Q235钢为基体,在Al Cl3-Na Cl-KCl-Mn Cl2熔融盐中添加适量La2O3,使用脉冲电源进行电沉积制得均匀的镀层。研究熔融盐中不同含量La2O3对镀层微观形貌和性能的影响;利用扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射(XRD)测试了镀层的表面形貌、镀层的组成和相结构;利用塔菲尔曲线、阳极极化曲线评价镀层的耐蚀性。结果表明,当La2O3的含量为0.20%时,镀层表面更光滑、细密、镀层的耐蚀性最好,镀层硬度为58HV0.05。
The clectrodeposited Al-Mn alloy coatings based on Q235 steel was obtained by clectrodepositing in molten salt of Al Cl3-Na Cl-KCl-Mn Cl2 with pulse power, the effects of the diferent content of La on microstructure and properties of Al-Mn alloy coating was studied. Microstructure, element content, element distribution and phase composition of the alloy coatings were investigated by SEM, EDS as well as XRD. Furthermore, the corrosion resistance of coating analysed by anode polarization curves and tafel curves. The results showed that when the content of La was 0. 20%, the microstructure of the alloy coating surface was more smooth, the obtained crystal is fined. Adding rare earth can improve the coating corrosion resistance, when the content of La was0. 20%, the coating corrosion resistance is best; as well as the highest hardness of 58HV0. 05 was obtained.
出处
《燕山大学学报》
CAS
北大核心
2016年第3期252-256,共5页
Journal of Yanshan University
基金
河北省自然科学基金资助项目(E2014203135)
燕山大学青年教师自主研究项目(14LGA015)
关键词
铝锰镀层
熔盐电沉积
镧
镀层性能
Al-Mn alloy coating
molten salts electrodeposition
La
corrosion resistance
