Effects of zincate treatment on adhesion of electroless Ni-P coating onto various aluminum alloys  

作　　者：Makoto HINO Koji MURAKAMI Yutaka MITO OKA Ken MURAOKA Teruto KANADANI 

机构地区：[1]Industrial Technology Research Institute of Okayama Prefecture [2]Okayama University of Science

出　　处：《中国有色金属学会会刊：英文版》2009年第4期814-818,共5页Transactions of Nonferrous Metals Society of China

摘　　要：The effects of alloying elements on zincate treatment and adhesion of electroless Ni-P coating onto various aluminum alloy substrates were examined.Surface morphology of zinc deposits in the 1st zincate treatment and its adhesion were changed depending on the alloying element.The zinc deposits in the 2nd zincate treatment became thinly uniform,and the adhesion between aluminum alloy substrate and Ni-P coating was improved irrespective of the alloying element.XPS analysis revealed the existence of zinc on the surface of each aluminum alloy substrate after the pickling in 5% nitric acid.This zinc on the surface should be an important factor influencing the morphology of zinc deposit at the 2nd zincate treatment and its adhesion.The effects of alloying elements on zincate treatment and adhesion of electroless Ni-P coating onto various aluminum alloy substrates were examined. Surface morphology of zinc deposits in the 1st zincate treatment and its adhesion were changed depending on the alloying element. The zinc deposits in the 2nd zincate treatment became thinly uniform, and the adhesion between aluminum alloy substrate and Ni-P coating was improved irrespective of the alloying element. XPS analysis revealed the existence of zinc on the surface of each aluminum alloy substrate after the pickling in 5% nitric acid. This zinc on the surface should be an important factor influencing the morphology of zinc deposit at the 2nd zincate treatment and its adhesion.

关 键 词：化学镀镍 锌酸盐 铝合金 治疗 合金涂层 粘连 合金元素 表面形貌 

分 类 号：TG174.4[金属学及工艺—金属表面处理]