摘要
使用浸渍、阳极极化曲线、以及俄歇电子能谱（ＡＥＳ）等研究了电镀Ｎｉ－Ｍｏ－Ｐ（表层）／Ｎｉ－Ｐ（底层）５％ＮａＣｌ溶液中的耐蚀性．实验表明，电镀双层镀层的耐蚀性均优于同等厚度的单层镀层（Ｎｉ－Ｐ或Ｎｉ－Ｍｏ－Ｐ镀层）．高于４００℃热处理温度对镀层进行热处理后，镀层的耐蚀性进一步改善．腐蚀电位实验以及ＡＥＳ分析指示，低于４００℃热处理温度的镀层，外层作为牺牲阳极对内层进行保护；高于４００℃热处理温度的镀层，由于在热处理过程中镀层层间结构发生变化以及在镀层表面形成高耐蚀性的保护层使双层镀层的耐蚀性增加．
The corrosion resistance of electrodeposited double-layer Ni-Mo-P(3μm,outer)/Ni-P(7μm,inner)deposits in 5 % NaCl solution were studied using immersion,anodic polarization curves and AES analysis.The experimental results showed that the double-layerdeposits were much better in the corrosion resistance than single-layar(Ni-P or Ni-MoP)deposits of same thickness.After heat treatment above 400℃,the corrosion resistance is furtherimproved.The results from AES analysis and corrosion potential expriment showed that theouter layer as a sacrificial anode to provide electrochemical protection to the inner layer whenthe double-layer deposists were heat treated below 400℃,that the protective effects were dueto the intersurface strcture change of deposits and formation of higher anti-corrosion protective layer on the surface of deposits when heat treated above 400℃.
出处
《晓庄学院自然科学学报》
CAS
1996年第3期43-46,共4页
Journal of Natural Science of Hunan Normal University
关键词
电沉积
镀层
耐蚀性
电镀
非晶态合金
镍合金
electrodeposition
double-layer Ni-Mo-P/Ni-P deposits
corrosion resistance
