DTAB和甘氨酸对钢铁表面氟铁酸盐转化膜耐蚀性的影响  

Effects of DTAB and Glycine on the Corrosion Resistance of Potassium Fluoferrite Conversion Coating on the Surface of Steel

作　　者：赵勇[1] 郭瑞光[1] 牛林清[1] 雷勇刚[1] 史丽萍[1] 

机构地区：[1]西安建筑科技大学西北水资源与环境生态教育部重点实验室,西安710055

出　　处：《表面技术》2014年第3期15-19,30,共6页Surface Technology

基　　金：国家自然科学基金项目(20976143);教育部高等学校博士学科点专项科研基金(20096120110007)~~

摘　　要：目的提高氟铁酸钾转化膜的耐蚀性。方法通过扫描电子显微镜分析、中性盐雾实验和极化曲线测试,研究氟铁酸盐转化液中加入十二烷基三甲基溴化铵和甘氨酸对钢铁表面转化膜耐蚀性的影响。结果转化液中加入两种物质使转化膜的厚度增加,自腐蚀电位正移了大约42 mV,自腐蚀电流降低了大约1/3,耐中性盐雾时间延长了2倍以上。结论钢铁表面转化膜的耐蚀性获得显著提高。Objective To improve the corrosion resistance of fluoferrite conversion coating. Methods SEM, neutral salt spray and polarization curve were used to study the effects of DTAB and glycine on the corrosion resistance of fluoferrite conversion coa- ting on the surface of steel. Results The results showed that the addition of DTAB and glycine in the conversion solution increased the thickness of the conversion coating prepared. The corrosion potential of the sample was about higher by 42 mV, the corrosion current density of the coating was lower by 1/3, and the neutral salt spray resistant duration was longer by more than 2 times. Con- dusion The corrosion resistance of steel was significantly improved.

关 键 词：钢铁 氟铁酸钾 化学转化膜 耐蚀性 DTAB 甘氨酸 

分 类 号：TG174.451[金属学及工艺—金属表面处理]