A synergistic experimental and computational study on CO2 corrosion of X65 carbon steel under dispersed droplets within oil/water mixtures

Corrosion Communications(2023)

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摘要
The CO2 corrosion behaviour of X65 carbon steel under water-in-oil droplet and oil-in-water droplet was systematically investigated by a combination of scanning electron microscopy, Raman spectroscopy, NPFLex3D and COMSOL simulation. Under the water-in-oil droplet, the formation of crystalline FeCO3 can be contributed to the high concentration of Fe2+ and CO32-, and the short diffusion path near the droplet edge promotes FeCO3 precipitation. Under the oil-in-water droplet, corrosion islands caused by the invasion of water can be found, indicating that the small water droplets emphasised the development of localized corrosion underneath the oil droplet.
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关键词
Carbon steel,CO2 corrosion,Dispersed droplet,Oil/water flow,COMSOL
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