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    Corrosion behaviour of X65 carbon steel under the intermittent oil/water wetting: A synergic effect of flow velocity and alternate immersion period

    Year: 2021

    Journal: Corrosion Sci., Volume 187, JUL 15

    Authors: Ma, Wen Long; Wang, Han Xiang; Barker, Richard; Kapur, Nikil; Hua, Yong; Neville, Anne

    Organizations: China University of Petroleum (East China); Institute of Functional Surface in University of Leeds

    Keywords: Carbon steel; CO2 corrosion; Current-time curve; Wetting hysteresis

    The effect of flow on corrosion behaviour of carbon steel under intermittent oil/water wetting was investigated by a newly-modified alternate wetting cell, combining with the use of potentiostatic polarisation, in-situ visualisation, contact angle measurements and scanning electron microscopy (SEM). The oil/water wetting time was determined by the formation of a thin oil/water film on the electrode surface after the transition of immersion state. A short alternate oil/water immersion period and low flow velocity can increase the ratio (oil to water wetting time) and efficiently mitigate the corrosion, proposing a logistic regression tendency between corrosion mitigation efficiency and oil/water wetting time.
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