Up to now, protection of aircraft structures is achieved by a multilayer system that includes, in general, a porous oxide or a conversion coating, a chromated primer and a top coat. Each layer play a role in the protection scheme and key factor is addressed by specifications. As environmental concern is a strong driving force, the replacement of hexavalent chromium in paint is considered by all aerospace manufacturers as a risky target to achieve in the next future. Since more than 20 years, paint suppliers and laboratories have investigated the replacement of chromate. No successful results were obtained in comparison with the performance of chromated product. However, it is now admitted that concerning certain types of corrosion (galvanic or filiform corrosion mainly), that do not require leachable inhibitors, the performance level of CF primer could be better than the one got with chromated primer due to their barrier performances.


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    Title :

    CrVI free primer: from corrosion findings to profile


    Contributors:


    Publication date :

    2002


    Size :

    9 Seiten, 9 Bilder, 3 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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