电沉积纳米晶Ni-Fe合金在碱性溶液中的腐蚀性能  

Corrosion Behavior of Electrodeposited Nanocrystalline Ni-Fe Alloy Coatings in Alkaline Solution

作　　者：陈闪闪[1] 戴品强[1] 洪永志[1] 郑贞[1] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350108

出　　处：《中国表面工程》2008年第5期54-58,共5页China Surface Engineering

基　　金：福建省科技计划重点项目(2006H0020);福建省自然科学基金项目(2008J0145)

摘　　要：通过脉冲电沉积的方法制备纳米晶Ni和Ni–Fe镀层,采用浸泡法和电化学的方法研究了镀层在10%NaOH溶液中的腐蚀行为。结果表明:在纳米Ni中加入适量的Fe可以提高其耐蚀性能。Ni–7.72%Fe合金镀层的耐蚀性能高于纳米Ni,而Ni–12.65%Fe合金镀层耐蚀性与纳米Ni的相当。在Ni–Fe合金镀层中,耐蚀性随着铁含量的增加而降低。在10%NaOH溶液中,所有镀层的Tafel曲线上均可观察到钝化区,表现了很好的耐蚀性。The nanocrystalline Ni and Ni-Fe coatings were fabricated by pulse electrodeposition process. The corrosion behavior of nanocrystalline nickel and Ni-Fe alloys in 10 %NaOH solution were investigated by soak and electrochemical polarization method respectively. The experimental results indicated that the nanocrystalline Ni with certain Fe content could improve the corrosion resistance. The Ni-7.72 %Fe coating had the best corrosion resistance than the Ni coating. The corrosion resistance of Ni-12.65 %Fe alloy coating was as good as Ni coating. The corrosion resistance of Ni-Fe alloy coatings decreased with the increase of Fe content in the alloy. Passive areas were found in the Tafel curves, so all coatings showed good corrosion resistance

关 键 词：脉冲电沉积 纳米晶 Ni—Fe合金镀层 腐蚀 

分 类 号：TG172.5[金属学及工艺—金属表面处理]