建筑钢结构Q345钢的表面镀层与性能研究  

Study on Surface Coating and Properties of Q345 Steel for Building Structure

作　　者：高硕 GAO Shuo1,2(1. Department of Infrastructure, Hebei Children＇ s Hospital, Shijiazhuang 050031, China; 2. Central South University of Forestry and Technology, Changsha 410004, China)

机构地区：[1]河北儿童医院基建处,河北石家庄050031 [2]中南林业科技大学,湖南长沙410004

出　　处：《材料开发与应用》2018年第5期60-65,共6页Development and Application of Materials

基　　金："十一五"科技支撑计划(2007BA120B073)

摘　　要：采用热浸镀的方法在建筑钢结构表面制备了不同成分的镀层,研究了镀液中Mn含量对镀层形貌、腐蚀失重和氧化失重的影响。结果表明,不同Mn含量浸镀液中基材表面浸镀层都是由δ相(FeZn_(10))、diffuse-Δ(破损δ相+锌)和粗大的ζ相(FeZn_(13))组成,且在相同的浸镀时间下三种镀层厚度没有显著差异;在Zn-0.5%Mn镀液中得到的镀层具有最佳的耐腐蚀性能,其次为Zn-1.3%Mn镀液中镀层,且都高于纯Zn镀液中得到的镀层;随着氧化时间的延长,三种锌液中的镀层的氧化失重都呈现先增加而后降低的趋势,氧化15 h内,相同时间下Zn-0.5%Mn和Zn-1.3%Mn镀层的氧化失重明显小于纯Zn镀层。Coatings of different components on the surfaces of the steel structure were prepared by hot dipping method,and the effects of Mn content in the bath on the morphology,corrosion weight loss and oxidation weight loss of the coating were studied.The results showed that the coatings from dipping solutions with different contents of Mn were composed of delta phase（ FeZn10）,diffuse-Δ（ damage delta phase ＋ Zn） and the coarse zeta phase（ FeZn13）,and in the same dipping time there were no significant differences on coating thicknesses; that the coating obtained in Zn-0.5% Mn plating bath had the best corrosion resistance,followed by Zn-1.3% Mn coating,higher than that from pure Zn plating solution; that with the increase of oxidation time,the oxidation weight loss of the three kinds of coatings increased first and then decreased,and within 15 hours of oxidation,the oxidation weight losses of coatings from Zn-0.5% Mn and Zn-1.3% Mn plating solutions were significantly lower than that of coating from pure Zn plating solution at the same time.

关 键 词：Q345 热浸镀 MN 腐蚀失重 氧化失重 

分 类 号：TG153[金属学及工艺—热处理]