ANOVA AND REGRESSION MODEL OF SLURRY EROSION PARAMETERS OF A POLYMERIC SPRAY- PAINT FILMS

In this paper, slurry erosion behavior of a polymeric paint film coated on steel and impacted with silica was investigated. The investigated coating was commercially available as ‘Kendo' which are used in automobile paint systems to provide protection to both mechanical and corrosive damage. Slurry erosion tests were conducted on the samples to investigate the effect of the common slurry erosion parameters: slurry concentration, impact angle, and impact velocity on the mass loss of the paint material as response. ANOVA was used to study the contribution of the individual parameters, and regression equations were developed to predict the response (mass loss). The results revealed that the slurry erosion was found to be increased by increasing the slurry concentration and impact velocity. In addition, the increase in the impact angle resulted the increase of erosion until the angle reaches 66o. Moreover, ANOVA analysis illustrated that slurry concentration and impact angle are the significant influencing parameters on the mass loss of the paint material, contributing of impact velocity was less significant. A linear regression model was developed based on the ANOVA results. The developed regression models were validated with the experimental results and found to be feasible.