ARTIFICIAL AGING COMPARISON BETWEEN HIGH SOLID AND THREE LAYER PAINT SYSTEM

Abstract

Due to the usage of the conversional high solid topcoat paint cycle and three-layer paint cycle system on vehicle body high bake aesthetical painting process, there is so much controversial opinion on last decade about aging performance of these two-painting system. Generally, vehicle manufacturers prefer three-layer aesthetical paint cycle on vehicle body. This cycle is formed as respectively primer layer, coloured basecoat layer and transparent clearcoat layer. High solid systems are generally applied by vehicle manufacturers to obtain value optimization when compared with three-layer paint system. On the other hand, UV and atmospheric aging resistance is not competitive as three-layer paint system. This is the main focussing point of manufacturers choice. In this study, these two paint systems artificial aging resistance (SAE J2527-2500 kj) compared. In order to understand situation in numeric system, the gloss and colour values were measured. In this comparison, solid white colour was chosen due to its easiness to obtain for both paint cycle system and being pure colour. At the end of study it was seen that until 60 % percent of test, colour & gloss properties behave not durable and there are main changings as colour and gloss values.