客车钢板合金化镀层对防腐性能的影响  

Effect of microstructure on anti-corrosion in Zn-Fe-alloying layer of carriage steel

作　　者：张振国[1] 冯强[1] 

机构地区：[1]中原工学院材料与化工学院,河南郑州450007

出　　处：《功能材料》2007年第A07期2609-2611,共3页Journal of Functional Materials

基　　金：河南省科技攻关资助项目（0424250052）

摘　　要：研究了不同锌铁合金化工艺对ST14钢的镀层及镀层对腐蚀的影响，用光学显微镜观察了合金化层的组织形貌，用X射线衍射方法分析了合金化层表面的相组成，用电位差仪测量了电位，并进行了盐雾腐蚀实验。结果表明：不同工艺的合金化层分别为Г＋δ1相和Г＋δ1＋ξ相；表面化学成分分别为FeZn7和FeZn7＋FeZn11；合金化层的电位分别为-920和-900mV左右，比ST14钢板的电位-620mV小，可作为阳极性涂层对钢铁基体起保护作用。锌铁合金化后的ST14防腐蚀性能远远超过ST14，且单相（61）较之双相（δ1＋ξ）有更好的防腐能力。The layer of different power sherardized of ST14 ＆ the effect on anti-corrosion were studied. The microstructure of Zn-Fe-alloying coatings was observed and analyzed by optical microscope, X-ray diffraction and M352 Corrosion Measurement System.The salt-fog corrosion experiment were put up. The results show that Zn-Fe-alloying coatings are made up of Г＋δ1 phases ＆ Г＋δ1＋ξ phases in different processes .The main chemical constitution is FeZn7 ＆ FeZn7 ＋FeZn11： The electric potential of different layer is -920, -900mV or so and can protect the base（-620mV） as negative electrode. Zn-Fe-alloying coatings have the best corrosion resistance than ST14 and single-phase（δ1） than double-phase （δ1＋ξ）.

关 键 词：锌铁合金化 腐蚀 δ1相 (δ1+ξ)相 

分 类 号：TG156.8[金属学及工艺—热处理]