Effect of Particle Size and Electrochemical Potential on Erosion Behavior of Brass in Liquid-Solid Solution

Erosion-corrosion of brass in a liquid-solid two-phase flow (3.5% NaCl+ SiC particle) was investigated by using a rotating disk system. Results showed that the corrosion rate of brass in the absence of erosion was independent of particle size. The main wastage form of brass was erosion-corrosion in the presence of smaller size SiC particle. Wear was the main wastage form by increasing electrochemical potential and using larger size SiC particle. Synergtic effect of erosion and corrosion were the major reasons for loss of brass, and the effect of corrosion to erosion played a more significant role. In addition, with the increase of particle size and electrochemical potential, the synergtic effect of erosion and corrosion played a more evident role in the wastage of brass. Erosion-corrosion wastage maps showed that erosion-corrosion regimes were related to particle size and electrochemical potential, low electrochemical potential resulted in low wastage no matter how large particle was, but increasing electrochemical potential increased the wastage to the medium or high level.