腐蚀
碳钢
材料科学
扫描电子显微镜
成核
冶金
阴极保护
铁质
电化学
图层(电子)
阳极
水溶液
复合材料
化学
电极
有机化学
物理化学
作者
Wei Liu,Juanjuan Dou,Songle Lu,Peng Zhang,Qinghe Zhao
标识
DOI:10.1016/j.apsusc.2016.01.228
摘要
Corrosion behavior of carbon steel in CO2 aqueous environment containing silty sand was investigated using corrosion mass loss method, scanning electron microscopy (SEM), energy diffraction spectrum (EDS), and various electrochemical measurements. The results show that the corrosion rate of carbon steel was obviously reduced due to the existence of silty sand. Silty sand promoted the rapid heterogeneous nucleation of corrosion product FeCO3 and simultaneously decreased its grains growth. Silty sand mixed with corrosion product to form the outer layer of corrosion scale with high compactness, blocking the transport of ferrous ions and leading to the formation of the inner layer of corrosion scale without silty sand. The existence of silty sand in the outer layer of corrosion scale inhibited anodic and cathodic currents.
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