【摘要】 用不同热处理工艺得到铁素体+珠光体与马氏体两种不同组织的低碳钢,通过周浸试验和扫描电镜(SEM)、电化学和X射线衍射(XRD)等手段分析两者的耐蚀性能差异表明,在周浸试验条件下,组织均匀的马氏体钢的耐蚀性明显优于由铁素体和珠光体组成的复相钢;马氏体组织的自腐蚀电位较高,阳极腐蚀电流密度较小,形成的锈层更加致密,且主要由性质稳定的α-FeOOH构成。更多还原

【Abstract】 Two kinds of carbon steels of different microstructures(ferrite-pearlite and martensite) with the same chemical composition were obtained by different heat treatment processes.The difference in corrosion resistance of the steels with these two kinds of microstructures was investigated by cyclic immersion corrosion test as well as scanning electron microscopy(SEM) observation,electrochemical measurement,and X-ray diffraction (XRD) analysis.The results showed that the martensitic steel exhibited a higher corrosion resistance than the steel with the microstructure consisting of ferrite and pearlite.Martensitic steel had a higher self-corrosion potential and a lower anodic corrosion current.The rust layer of martensitic steel was more compact and mainly composed ofα-FeOOH.更多还原