One measurement of the quality of a phosphated and painted metal substrate is through the use of accelerated test procedures involving corrosive environments. The subsequent test results have been found to have dependance upon the specific test procedure that was utilized. In particular, the effects of the acidulated rinse upon galvanized steel were strongly dependent upon the test procedure involving adhesion measurements after water immersion; whereas, a negligible effect was exhibited via a cyclic scab test procedure. Finally, it was determined that a chemical modification of the phosphate coating composition can alter the effects of the acidulated final rinse upon hot dipped galvanized steel with respect to adhesion performance.


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    Title :

    Automotive Test Procedures-Corrosion versus Adhesion Properties of Painted Metal Substrates


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1985



    Publication date :

    1985-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English