A THEORETICAL MODEL for the delamination of organic coatings from zinc-phosphated steel surfaces will be presented. It will be shown that under ambient conditions and in neutral NaCl media delamination occurs as a result of the formation of a surface-tension gradiant during oxygen depolarization and, subsequently, the disruption of adhesion at the coating-phosphate interface. Dissolution of the phosphate coating occurs only after adhesion is lost. An accelerated cathodic delamination test showing good correlation with the long-term GM-scab test will also be introduced.


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    Titel :

    Mechanism of Corrosion and Delamination of Painted Phosphated Steel During Accelerated Corrosion Testing


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    SAE International Congress and Exposition ; 1986



    Erscheinungsdatum :

    1986-02-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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