This study has employed computational fluid dynamics (CFD) through ANSYS Fluent to evaluate corrosion rates in carbon steel in direct contact with sulfate present in flowing water. A 3D model of a carbon steel pipe containing water is created. Sulphate ion concentration is one of the important parameters for describing the properties of water. The cathodic and anodic reaction mechanisms dominate the corrosion process, as reflected in a corrosion model in ANSYS Fluent based on electrochemical theory. The results indicate that with an increase in velocity from 0.1 to 0.8 ms -1 at 300K fluid temperature, the rate of corrosion of carbon steel increases from 4.99607 to 4.9962 mm per year. The effects of several factors, including temperature and water velocity, on the rate of corrosion are investigated. For the temperature rise from 300 K to 325 K, the rate of corrosion is found to increase from 4.99602 mm to 7.126 mm. Corrosion rate is greatly affected by the geometry of the pipe, including bends and elbows. Whereas there was negligible corrosion in the straight inlet pipe, the corrosion rate increased greatly in the horizontal pipe downstream. With the bend in the pipe, the centrifugal force acts on the fluid and causes it to move toward the pipe walls, increasing the shear stress on the walls to 3.207 Pa. The scope of this work is to provide valuable information on carbon steel pipe corrosion under flowing water, which can be used to help develop better design, operation, and maintenance measures to control corrosion.
Das et al. (Fri,) studied this question.
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