2008 Volume 57 Issue 3 Pages 146-152
It is necessary to evaluate material performance from erosion tests under known water impingement conditions, in order to derive effective equations for estimating and predicting damage and life span of practical materials which suffer from erosion caused by water droplet impingement. Using a water-jet testing apparatus, impingement conditions of water droplets were obtained with aluminum foils mounted on aluminum specimen surfaces under several operating conditions. Fundamental equations for estimating erosion damage to materials were proposed in the previous paper. In this paper, effects of impingement parameters such as velocity, frequency and diameter of water droplets on erosion behaviors were investigated with water droplet erosion tests for ordinary carbon steel, stainless steel and carbon tool steel as industrial materials. As a result, estimative equations of materials for erosion by water droplet impingement were precisely derived and validated from the test results. This paper introduced life predictions of industrial materials with the incubation period which is one of most important factors in the erosion behavior.