This work addresses the correlation between stone-chip resistance and mechanical properties of automotive solid colour coating systems. Single-impact tests, which are believed to realistically simulate chipping due to stone impact, were performed to investigate eight different coating systems. Additionally, conventional tests on chip resistance currently used in automotive industry were performed. Results were related to mechanical properties of the coatings, measured by dynamic mechanical thermal analysis and double cantilever adhesion test. It is found that coating systems with a low glass transition temperature for the primer have better stone-chip resistance. Conclusions: 1. Compared to the work by Bender, single-impact stonechip tests performed at different temperatures enable a more rigorous and quantitative analysis of the amount and the nature of stone-chip damage for specific coating systems. 2. Testing at room temperature of the series of coating systems containing different primers did not reveal significant differnces in their resistance to stone chipping, with the exception of two systems which showed very poor adhesion between topcoat and primer. At this temperature, all systems revealed the same type of failure, which was more dependent on the impact velocity than on the type of primer. 3. The largest differences in stone-chip resistance were observed during impact tests at 20 deg C. 4. The highest chip resistance was found for the coating system of which the primer has the lowest glass transition temperature, despite the relatively low level of adhesion between primer and topcoat. 5. The results of the present study suggest that in the range of temperatures tested (-20 to +20 deg C) the glass transition temperatures of the primer can be a useful measure for predicting the stone-chip resistance of automotive coatings systems for a given thickness of the steel substrate.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Relation between chip resistance and mechanical properties of automotive coatings


    Additional title:

    Die Beziehung zwischen dem Steinschlagwiderstand und den mechanischen Eigenschaften von Automobilbeschichtungen


    Contributors:
    Lonyuk, M. (author) / Bosma, M. (author) / Vijverberg, C.A.M. (author) / Bakker, A. (author) / Janssen, M. (author)


    Publication date :

    2008


    Size :

    8 Seiten, 12 Bilder, 3 Tabellen, 11 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Chip resistant coatings for the automotive industry

    Roesler, R.R. / Mirgel, V. | Tema Archive | 1989


    Chip resistant coatings for the automotive industry

    Roesler,R.R. / Mirgel,V. / Mobay,US et al. | Automotive engineering | 1989



    Chip Resistant Coatings for the Automotive industry

    Roesler, Richard R. / Mirgel, Volker | SAE Technical Papers | 1989


    Scratch resistance of automotive plastic coatings

    Ryntz,R.A. / Abell,B.D. / Hermosillo,F. et al. | Automotive engineering | 1998