电弧喷涂Zn、Al系涂层在混凝土环境中的腐蚀行为  

Corrosion Behavior of Arc Spray Zinc and Aluminum Coating in Concrete Environment

作　　者：周萌[1] 楼淼[1] 芦玉峰[1] 刘伟[1] 胡新东[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《热加工工艺》2013年第22期129-132,共4页Hot Working Technology

摘　　要：以Zn涂层、Al涂层及ZnAl15涂层为研究对象,通过混凝土环境下的加速腐蚀实验,研究三种涂层在混凝土环境中的腐蚀行为。研究结果表明:混凝土填埋环境中,ZnAl15涂层的腐蚀速率明显小于Zn涂层和Al涂层;Zn涂层形成的腐蚀产物不具有对基体的保护作用;Al涂层能够在试片表面形成钝化层,有效隔离腐蚀性介质;ZnAl15涂层的腐蚀产物呈现出致密、疏松混合的特征。相对于其他两种涂层,ZnAl15涂层既具有Zn涂层的牺牲性阴极保护作用,又保持了Al涂层较强的耐蚀性,腐蚀速率较低,耐蚀寿命更长,具有较为广阔的应用前景。The corrosion resistance behavior of zinc, aluminum, and ZnA115 coating were compared through accelerated corrosion experiments in the concrete environment. The results show that： in the concrete landfill environment, the corrosion rate of ZnA115 coating is much lower than zinc and aluminum coating; the corrosion products of zinc coating do not have any protectve effects to the matrix; while aluminum coating can form a passivation layer on the surface to isolate corrosive objects. The corrosion products of ZnA115 coating show the characteristics of the mixture of compact and loose objects. Compared to the other two coatings, ZnAlts coating not only has the advantage of the sacrificial cathodic protection function of zinc coating, but also has strong corrosion resistance ability of aluminum coating, therefore it has lower corrosion rate and longer life-span in the corrosion environment, which has broad application prospects.

关 键 词：电弧喷涂 Zn涂层 AL涂层 ZnAl15涂层 混凝土 

分 类 号：TG174.4[金属学及工艺—金属表面处理]