Flow Corrosion Behavior of X100 Pipeline Steel in Simulated Formation Water

The self-designed flow system was used to study the flow corrosion of X100 pipeline steel in simulated formation water environment by electrochemical measurements as well as computational fluid dynamics (CFD) simulation. The effects of fluid flow velocity and fluid impact angle on X100 steel were determined. When the fluid flow velocity changes between 0.5-2.0 m/s, X100 steel is controlled by activation, and as the flow velocity increases, the self-corrosion current I-corr increases, the corrosion rate increases; when the impact angle increases from 30 degrees to 90 degrees, the self-corrosion current I-corr decreases and the corrosion rate decreases. CFD simulations show that at different flow velocities and impact angles, the velocity field distribution on electrode surface is different. At the minimum impact angle of 30 degrees, the electrode area has the largest flow velocity and shear stress, therefore the corrosion damage is the most serious. (c) The Author(s) 2020. Published by ECSJ.

Automated summary

The study investigated the effects of fluid flow velocity and impact angle on the corrosion of X100 steel, finding that an increase in flow velocity and decrease in impact angle leads to higher corrosion rates. It is important to consider the corrosion of pipeline steel in different environmental conditions.