摘要
电沉积Ｎｉ－Ｗ－Ｐ非晶合金中Ｗ含量可高达５５．２％，硬度为７００～１１００Ｈｖ，经５５０℃热处理，可达１３００～１４００Ｈｖ．镀层硬度和耐蚀性优于Ｎｉ－Ｐ非晶镀层［１］．非晶镀层中的类金属元素Ｐ可使腐蚀电位正移；高熔点元素Ｗ可使合金镀层在酸溶液中发生钝化，且Ｗ含量越高维钝电流密度越低；金属Ｃｒ元素除降低维钝电流密度外，还使钝化区范围加宽，孔蚀电位显著变正．浸泡实验结果表明，在３０℃、１ｍｏｌ／Ｌ的ＨＣｌ溶液中，不锈钢ＳＵＳ３０４的腐蚀速率为Ｎｉ－Ｗ－Ｐ非晶镀层的１０倍、Ｎｉ－Ｗ非晶镀层的４０倍和Ｆｅ－Ｗ非晶镀层的１５～５０倍．在６０℃、０．５ｍｏｌ／Ｌ的Ｈ２ＳＯ４溶液中，不锈钢的腐蚀速率为Ｆｅ－Ｗ非晶镀层的１８０倍、Ｎｉ基镀层的１００～７００倍．
In the study of the corrosion resistance of amorphous electrodeposition,some elements are found to be of great importance for corrosion resistant ability.Among them are P,W and Cr.Metal like element P can improve the corrosion resistance of the deposit by moving the corrosion potential positively.W is high melting point metal,it can make the deposit passived in acid solution and the deposit passive current density decreases as the content of W in deposit increases.Metal element Cr can decrease the passive current density as well as broaden the passive potential range.It also can move the deposit pitting potential positively.Immersion tests show that the corrosion resistance of amorphous alloy is better than SUS304.
出处
《天津大学学报》
EI
CAS
CSCD
1999年第3期374-377,共4页
Journal of Tianjin University(Science and Technology)
关键词
电沉积
非晶态合金
耐蚀性
镀层
electrodeposition amorphous deposits adding elements high corrosion resistance
