电流密度对光亮镍-铁合金镀层表面形貌及耐蚀性的影响  

The Effects of Current Density to Surface Morphology and Corrosion Resistance of Bright Ni-Fe Alloy Coating

作　　者：李雪松[1] 马立军[2] 高金芝 王新 

机构地区：[1]长春工业大学材料科学与工程学院,吉林长春130012 [2]胜利油田井下作业公司,山东东营257077 [3]松原市建筑工程质量检测中心(有限公司),吉林松原138001

出　　处：《电镀与环保》2009年第3期7-9,共3页Electroplating & Pollution Control

基　　金：吉林省教育厅"十一五"科学技术研究项目(2008331)

摘　　要：通过电沉积方法制备光亮镍-铁合金镀层,利用扫描电镜测定镀层表面显微形貌（SEM）,X射线衍射仪测定合金镀层的相结构（XRD）,然后对合金镀层进行浸泡腐蚀实验,观察其腐蚀行为,并测定其腐蚀速率。结果表明：镍-铁合金镀层在质量分数为3.5%的NaCl溶液中的腐蚀速率较在质量分数为5%的H2SO4溶液中的腐蚀速率小,即：在质量分数为3.5%的NaCl溶液中有较好的耐蚀性,最小的腐蚀速率为0.21 mg/（dm^2·h）,且在电流密度为4～6 A/dm^2工艺条件下获得的合金镀层在两种溶液中都具有较好的耐蚀性能。Bright Ni-Fe alloy coating was prepared using electrodeposited method. The microstructures of the alloy coating was determined by scanning electron microscope （SEM）; the phase compositions of the alloy coating was analyzed by X-ray diffraction（XRD）; and immersion corrosion testing was then done on the alloy coating to observe the corrosion behavior and corrosion rate. The results show that the corrosion rate of alloy coating in 3.5 % NaCl solution is slower than in 5 % H2SO4 solution, and the better corrosion resistance is manifested in 3. 5% NaCl solution. The smallest rate of corrosion is 0. 21 mg/（dm^2 · h）, and alloy coatings have a better corrosion resistance in each of solution when current density is 4-6 A/dm^2.

关 键 词：电流密度 镍-铁合金 耐蚀性 

分 类 号：TQ153[化学工程—电化学工业]