论文部分内容阅读
采用动电位极化、电化学阻抗谱(EIS)测试、浸泡实验、SEM和EDS分析研究了Cr的添加对铸态X52钢在湿H2S环境中腐蚀行为的影响。结果表明,Cr的添加,对阴极反应有显著的抑制作用,提高了铸态X52钢的耐蚀性。但耐蚀性并不总是随着Cr含量的升高而增强。Cr的添加对腐蚀产物的形貌有很大影响,使表面腐蚀产物由疏松多孔变为致密平整。内层富Cr腐蚀产物的出现,使腐蚀速率明显降低。
The effects of Cr addition on the corrosion behavior of as-cast X52 steel in wet H2S environment were investigated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), immersion test, SEM and EDS. The results show that the addition of Cr has a significant inhibitory effect on the cathode reaction and improves the corrosion resistance of as-cast X52 steel. However, corrosion resistance does not always increase with increasing Cr content. The addition of Cr has a great influence on the morphology of the corrosion products, which makes the surface corrosion products change from loose porous to dense and smooth. The presence of Cr-rich inner-layer corrosion products significantly reduces the corrosion rate.