摘要
利用ＸＰＳ等手段研究了化学镀Ｎｉ－Ｍｏ－Ｐ合金在Ｈ＿２ＳＯ＿４溶液中的阳极溶解行为。结果显示，稳定电位下阳极形成稳定致密的钝化膜，其主要成分为Ｎｉ（ＯＨ）＿２，其余为Ｎｉ（ＰＯ＿４）＿２、ＭｏＯ＿２及部分结合水。阳极电位正移，阳极表面膜厚度增加，结合水减少，在０．２Ｖ左右，阳极溶解电流剧增，局部腐蚀严重。此时，表面膜的主要成分为Ｎｉ＿３（ＰＯ＿４）＿２，其余为Ｎｉ（ＯＨ）＿２及ＭｏＯ＿２。合金在阳极溶解过程中出现磷（钼）在合金的富集。
X-ray photoelectron spectroscopy has been used to study the anodic dissolution behavior of electroless Ni-5%Mo-17.5%P alloy coatifng.At stable potential,the components of the surface film are Ni(OH)2,Ni3(PO4)2,MoO2 and so on. Ni(OH)2 is in majority.The amount of Ni3(PO4)2 increase with the increase of anodic potential.The change of the composition makes the film lose its protection property, At 0.2V,the main component is Ni3(PO4)2,others are Ni(OH)2,MoO3.Phosphorus and molybdenum are enriched in the surface of the alloy while the alloy is anodicaly dissolved.
出处
《电镀与精饰》
CAS
1996年第4期7-9,共3页
Plating & Finishing
关键词
阳极溶解
镀合金
电镀
镍钼磷合金
electroless Ni-Mo-P alloy coating,anodic dissolution,XPS
