锌铁合金化钢板镀层结构及防腐蚀性能的研究  

Surface Structure and Anticorrosion Properties of Zn-Fe Alloying Steel Sheet

作　　者：张振国[1] 汤峰[1] 

机构地区：[1]中原工学院材料与化学工程系,河南郑州450007

出　　处：《材料保护》2005年第8期51-53,共3页Materials Protection

基　　金：河南省科技攻关项目(0424250052)

摘　　要：为了改善ST12钢板的耐腐蚀能力,采用粉末渗锌工艺对ST12钢进行了合金化处理,然后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M352CorrosionMeasurementSystem电位差仪测量了电位,并对其进行了静态腐蚀试验。结果表明:合金化层由Г相和δ1相组成,δ1相为主,成分为FeZn7;合金化后的静态防腐蚀性能远远超过ST12,并且优于同等条件下的热镀锌;合金化层的电位为-920mV左右,可作为阳极性涂层对钢铁基体起保护作用。本研究改善了ST12钢的防腐蚀能力,扩大了其应用范围。Alloying process based on power sherardizing technology was conducted for ST12 steel to improve the corrosion resistance of the steel. The microstructure and corrosion behavior of the Zn-Fe alloying coating was investigated using an optical microscope, an X-ray diffractometer, and an M352 corrosion measurement system. The results showed that the Zn-Fe alloying coating was composed of Г phase and δ1 phase, with the δ1 phase to be dominant. The Zn-Fe alloying coating had a chemical composition of FeZn7 and far better static corrosion resistance than the ST12 steel and hot galvanizing as well. Moreover, the Zn-Fe alloying coating had a potential about -920 mV and could be used as a positive coating for the steel.

关 键 词：腐蚀 锌铁合金化 粉末渗锌 δ1相 

分 类 号：TQ153[化学工程—电化学工业]