Zn-Fe合金粉末渗层的制备及耐蚀性能  

Preparation and Corrosion Resistance Evaluation of Powder Sherardizing Zinc-Iron Coatings on Q235 Steel 1,211

作　　者：李金柱[1,2] 农登 郑开宏 赵明纯[2] 

机构地区：[1]广东省工业技术研究院金属成型与加工技术研究所,广东广州510650 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《材料保护》2013年第12期17-19,7,共3页Materials Protection

基　　金：广东省工业技术研究院(广州有色金属研究院)青年科技创新基金(2010G1183045);广东省企业特派员工作站项目基金(2010B090500010)资助

摘　　要：采用粉末渗锌技术制备的Zn-Fe合金比电镀法或热浸镀法制备的性能更好,成本更低且无污染,目前对此研究较少。为此在Q235钢表面采用粉末渗锌法制备Zn-Fe合金渗层。用金相显微镜和X射线衍射仪观察渗层组织,测试渗层结构;通过盐雾腐蚀和电化学试验研究了渗层的耐蚀性能。结果表明:Zn-Fe渗层主要由FeZn11和FeZn7组成,渗层较致密,与基体呈良好的冶金结合;Zn-Fe合金渗层具有较低的腐蚀电流密度,较好的耐蚀性能,对钢铁基体具有较好的保护作用。Zn-Fe alloy coatings were prepared on the surface of Q235 steel via powder sherardizing technology.The microstructure and phase composition of as-prepared Zn-Fe alloy coatings were analyzed by scanning electron microscopy and X-ray diffraction.The corrosion resistance of the coatings was evaluated with salt-spray corrosion test and electrochemical test.Results indicated that as-prepared Zn-Fe alloy coatings mainly consisted of FeZn 11 and FeZn 7,and they exhibited dense microstructure as well as good metallurgical bonding to steel substrate.In the meantime,Zn-Fe alloy coatings had low corrosion current density and good corrosion resistance,and they could well protect iron and steel substrates.

关 键 词：粉末渗锌 Zn—Fe合金渗层 结构 耐蚀性能 

分 类 号：TG174.445[金属学及工艺—金属表面处理]