A full factorial experimental investigation has been carried out into factors affecting the resistance of a commercial acrylic/melamine automotive clearcoat to erosion by silica sand particles. The factor variables and their ranges were: particle size 125-425 my m; temperature 30 degree C-65 degree C; impact angle 30 degree-90 degree; particle velocity 35 m s-1-55 m s-1; and the baking process applied to the coating. An empirical linear regression model for the erosion response of the coating with Radj2 = 97.5% was generated from the data. The regression coefficients of this model quantify the relative strengths of the effects of each of the factors. Several interactions between the factor variables were identified. In particular, the glass transition of the coating, which occurs at 40 degree C, has a significant effect on its response to erosion. The study has allowed the combinations of conditions that would be of most concern for automotive paint users to be identified.
Full factorial investigation of the erosion durability of automotive clearcoats
Tribology International ; 33 , 8 ; 559-571
2000
13 Seiten, 37 Quellen
Article (Journal)
English
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