电刷镀纳米晶镍铁合金镀层腐蚀特性的研究  

Corrosion Characteristic of Nanocrystalline Ni-Fe Alloy Coating Synthesized by Brush Plating

作　　者：项忠楠[1] 戴品强[1] 陈闪闪[1] 林志福[1] 葛敏[1] 

机构地区：[1]福州大学,福建福州350108

出　　处：《稀有金属材料与工程》2009年第1期151-156,共6页Rare Metal Materials and 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(E0410011)

摘　　要：采用可溶性阳极电刷镀的方法制备纳米晶Ni-Fe合金和纳米晶Ni镀层,用浸泡法和电化学极化法研究了纳米晶Ni、Ni-5.84%Fe和Ni-13.49%Fe镀层在3.5%NaCl和10%HCl溶液中的腐蚀行为。结果表明:通过此法制备的Ni和Ni-Fe合金镀层具有典型的纳米晶结构;随着含Fe量的增加,镀层的晶粒尺寸减小,硬度增加;所制备的纳米晶Ni-13.49%Fe合金镀层组织结构均匀致密,晶界处没有明显的孔洞或缺陷,晶界及三叉晶界处的原子错配度小,过渡均匀,其在3.5%NaCl溶液中的耐蚀性优于纳米晶Ni镀层,而在10%HCl溶液中的耐蚀性与纳米晶Ni镀层相当;纳米晶Ni和纳米晶Ni-Fe合金刷镀层在3.5%NaCl溶液中的腐蚀形态均为点蚀,而在10%HCl溶液中的腐蚀形态则为均匀腐蚀。Nanocrystalline nickel and Ni-Fe alloy coatings were synthesized by brash plating using soluble anode. The corrosion characteristics of nanocrystalline nickel, Ni-5.84%Fe and Ni-13.49%Fe alloys were investigated by soak a method and an electrochemical polarization method, respectively. The experimental results indicate that the typical nanocrystalline nickel and Ni-Fe alloy coatings can be synthesized by brush plating, and the alloying element Fe has the effects of solution strengthening and grain size refinement. The nanocrystalline Ni-13.49%Fe alloy is dense in nature and pore free, and exhibits better corrosion resistance in a 3.5 wt% NaCl solution than the nanocrystalline nickel. In 10 wt% HCl solution, the nanocrystalline Ni-13.49%Fe alloy also shows a good corrosion resistance as the nanocrystalline nickel. The surface morphology of all samples after corrosion show a spot corrosion feature in 3.5 wt% NaCl solution, however, the samples are uniformly corroded in 10 wt% HCl solution.

关 键 词：电刷镀 纳米晶 镍铁合金镀层 腐蚀 

分 类 号：TG172.5[金属学及工艺—金属表面处理]