The Effects of Velocity and Pressure Vibration on Erosion–Corrosion of Mild Steel in Water

The effects of velocity and pressure vibration on erosion-corrosion behavior of a mild steel (SS41) in tap water were studied with an impingement jet flow apparatus and a water bath. Obtained results were as follows: (1) The mass loss of the steel increased with the velocity in the range of 0 to 0.5 m/s, and decreased with the velocity above 0.5 m/s. The mass loss ranging from 1.5 to 6.0 m/s became as small as that at 0 m/s. (2) The mass loss occurring in the flow was proportional to the area of damaged surface, which consisted of pits. (3) The oxidation number of the iron oxide of the corrosion products was smaller in the flow field than in the static field. (4) The mass loss was larger in a vibrating pressure field than in a static field, and the damage pattern was nonuniform compared with that in the static field.