锌铝/富铝复合涂层在海洋环境中的耐蚀性研究  

Research on Corrosion Resistance of Zn-Al/Rich-Al Composite Coatings in Marine Environment

作　　者：舒畅[1] 刘彬[2] 周漪[1] 

机构地区：[1]中国兵器工业第五九研究所,重庆400039 [2]中国人民解放军驻296厂军事代表室,重庆400054

出　　处：《表面技术》2012年第5期56-59,共4页Surface Technology

基　　金：国防基础科研计划资助项目(A1020110014)

摘　　要：在锌铝涂层表面喷涂HD590富铝涂液形成复合涂层,对比了锌铝涂层与复合涂层的附着强度、耐磨性、微观形貌,并通过中性盐雾试验、海洋平台棚下大气暴露试验和海水周期喷淋试验,对比研究了二者的耐蚀性。结果表明:复合涂层的附着强度比锌铝涂层提高了30%,耐磨性好,涂层厚度满足紧固件工件的配合精度要求;复合涂层的抗盐雾腐蚀性能和耐海洋环境腐蚀性能优于锌铝涂层,其防腐机理为屏蔽作用、钝化作用和阴极保护相结合;防腐过程中,富铝层发生活化反应,产生一定的牺牲阳极保护作用,同时使涂层腐蚀电位负移,提高了其阴极保护作用。Composite coating was prepared by spraying the HD590 rich-A1 dope on Zn-A1 coating. Comparing the adhesion intensity, abrasion resistance, micro-morphology of composite coating with Zn-A1 coating, and their anticorro- sion performance were studied by salt spray test, marine platform outdoor exposure and seawater periodic spraying test. The results show that the adhesion intensity of composite coating is improved 30 ~ than Zn-A1 coating, the abrasion re- sistance is excellent and the thickness settles for precision of fasteners; The composite coating exhibits obviously better anticorrosion performance than Zn-A1 coating in salt spray and marine environment. The corrosion mechanism is that composite coating protects substrate steel by combining action of sheet shield, passivating and cathodal protection; In the anticorrosive process, the rich-A1 coating activating dissolves and exerts sacrificial anode effects, also it enhances the

关 键 词：海洋环境 锌铝涂层 HD590富铝涂层 复合涂层 耐蚀性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]