The coating application temperature, degree of cure, and film thickness were examined to observe which has the largest effect on cathodic disbondment of fusion-bonded epoxy (FBE) coating. Cathodic disbondment is selected as the key performance test for adhesion because it stimulates field condition for disbonding of a coating from a pipeline. For a conventional and new generation FBE coating, the cure varied from 70% to 100% by changing the time to quench after powder application. With a film thickness of 175 to 200 micrometer, new FBE has a disbondment of 2.4 mm at 70% cure and a disbondment of 1.8 mm at 99.9% cure. The new FBE is used where superior cathodic disbondment performance is needed, and low application temperatures were desired. Low application temperature will tend to give a lower degree of cure, which will give poor cathodic disbondment performance. The cathodic disbondment performance of conventional and new generation FBE coating improves with an increase of cure percentage.


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    Title :

    Application temperature, cure, and film thickness affect cathodic disbondment of FBE coatings


    Additional title:

    Einfluss von Anwendungstemperatur, Aushärtung und Schichtdicke auf die kathodische Enthaftung von Epoxidharz-Pulverbeschichtungen


    Contributors:

    Published in:

    Materials Performance ; 45 , 6 ; 24-28


    Publication date :

    2006


    Size :

    5 Seiten, 8 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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