摘要
为了研究Zn-Ni合金纳米多层膜的耐蚀性能,制备了纯锌、锌镍合金及镍含量不同的锌镍合金纳米多层膜3种镀层。采用中性盐雾试验、浸泡试验和电化学试验法对锌镍合金多层膜的耐蚀性进行了研究。采用EDAX、锌镍合金相图、扫描电镜,对多层膜的成分、相结构和镀层的表面形貌进行了研究。结果表明:合金多层膜是由含镍量为14%左右的低镍层和含镍量为77%左右的高镍层叠加而成,其低镍层的相结构主要为γ相,高镍层的相结构为γ+α2种相组织的混合相;多层膜表面较为致密,无明显的缺陷组织,其调制波长为366 nm左右,其耐蚀性能优于纯锌镀层和锌镍合金镀层。
Three kinds ofZn-Ni alloy multilayer coatings were prepared using electrodepo-sition. The corrosion resistance of the electrodeposited Zn-Ni al-loy multilayer coatings was evaluated by using neutral salt-fogtest, immersion test, and electrochemical test. The composition,phase structure, and morphology of the coatings were analyzedbased on energy dispersive X-ray analysis and scanning electronmicroscopic analysis, in association with the phase diagram ofZn-Ni alloy. Results indicate that the Zn-Ni alloy multilayercoatings are composed of a low nickel layer with a Ni content ofabout 14% and a high nickel layer with a Ni content of about77%. The low nickel layer mainly consists of γ phase, and thehigh nickel layer mainly consists of mixed γ+α phases. At thesame time, the Zn-Ni alloy multilayer coatings have compact sur-face and are free of defects, showing better corrosion resistancethan electrodeposited Zn coating and conventional Zn-Ni alloycoating.
出处
《材料保护》
CAS
CSCD
北大核心
2009年第11期8-11,共4页
Materials Protection
基金
云南省自然科学基金项目(2006B0048M)
昆明市科技局科计合作项目(08H130101)
云南省自然科学基金项目(2008CD147)
关键词
锌镍合金
电沉积
纳米多层膜
耐蚀性能
Zn-Ni alloy
electrodeposition
multilayer coating
corrosion resistance
