Abstract
Erosion corrosion of brass in water containing 3% sodium chloride with relative velocities of 1-7m/sec at 30°C were studied by using a rotor-type testing apparatus. The results obtained were summarized as follows: 1) The corrosion rates of brass increased with increasing relative velocity, but they increased little at higher velocities than 4m/sec. 2) The corrosion rates of brass increased markedly when sand particles were added to the solution, and the effect of sand particles was promoted with an increase in relative velocity. 3) At relative velocity of 3m/sec brass was protected almost completely by supplying cathodic current even in the case of containing sand particles in the solution, but the cathodic protection was not sufficient when the relative velocity was higher than 5m/sec, because of the mechanical characteristics of sand erosion. 4) Erosin of brass increased makedly with increasing relative velocity.
