摘要
研究镀Ni层相组成和微观结构,分析Mg-Al合金微弧氧化陶瓷膜表面化学镀Ni层的形成过程。结果表明,化学镀时间为1～20 min时,镀层厚度增长速度较快,20 min后,镀层厚度增长速度逐渐减缓。多孔陶瓷膜表面首先沉积一层尺寸为几微米的Ni颗粒,微小颗粒团聚长大逐渐形成直径十几微米的胞状体结构。相比于多孔陶瓷膜,化学镀Ni后,试样的腐蚀电位正移105 m V,腐蚀电流大幅度下降,耐蚀性提高。
The growth process of plating Ni layer on micro-arc oxidation Mg-A1 alloy was studied by analyzing phase components and microstructure, The results show that the thickness of plating layer increases quickly when the plating time are 1-20 min, and it is slow down after 20 min. Ni particles are deposited on the surface of porous ceramic membrane with few microns. And then the particles are clustered to a cellule shape with 10μm. The corrosion potential of the sample increases 105 mV after plating, and the corrosion current decrease. The corrosion resistance of the sample is improved.
出处
《铸造技术》
CAS
北大核心
2015年第4期925-928,共4页
Foundry Technology
关键词
微弧氧化
化学镀
耐蚀性
microarc oxidation
chemical plating
corrosion resistance
