Effect of Temperature and Relative Humidity of Air on Car Refinishing

Abstract

This study was to examine and compare the effect of different levels of temperature and relativehumidity of air on car refinishing. The interested parameters are the relative humidity studied from 60, 70 and 80%, the painting temperature investigated from 25, 30 and 35 ^oC, and finally the baking temperatures of 40, 50and 60 ÌC. Acrylic lacquer paint - Lucite was sprayed onto the surface of 243 specimens having dimensions of1 x 1-ft. The data expressed as an average percentage of damage of area was carried out using the determinationof resistance to water - Water immersion method, the determination of resistance to Gasoline, and the determinationof resistance to Diesel Oil. With 3 replicates, the factorial design was used to test the data and then the data wasanalyzed by SPSS/FW program to find its two way ANOVA. According to the conditions in Thailand, the findingwere the optimum levels of relative humidity was 60-70%, the optimum levels of painting temperature was 30-35 ^oC and the optimum levels of baking temperature was of 60 ^oC.

Keywords: Temperature / Relative Humidity / Resistance to Water / Resistance to Gasoline /Resistance to Diesel Oil