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    Experimental and simulation studies of the effect of surface roughness on corrosion behaviour of X65 carbon steel under intermittent oil/ water wetting

    Year: 2022

    Journal: Corrosion Sci., Volume 195, FEB

    Authors: Ma, Wenlong; Wang, Hanxiang; Wang, Yongxing; Neville, Anne; Hua, Yong

    Organizations: Shandong Provincial Natural Science Foundation [ZR202102190003]

    Keywords: Carbon steel; Surface roughness; CFD; Intermittent oil; water wetting; CO(2 )corrosion

    The effect of surface roughness on corrosion behaviour of carbon steel under intermittent oil/water wetting with different flow conditions was investigated by an alternate wetting cell, combining with potentiostatic polarisation, contact angle measurement, and computational fluidic dynamics (CFD) analysis. Under static flow conditions, the rough surface increased the oil film lifetime and consequently mitigated the corrosion as the oil film has good adhesion and acted as a blocking barrier. However, under dynamic flow conditions, the smooth surface polished by 6 Micron diamond suspension shows the longest oil film lifetime and highest corrosion mitigation efficiency, caused by small turbulence eddies and low shear stress.
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