The recent trend in aerospace industry is to develop coatings for protecting aerospace materials from various combinations of environments. One such combination is protection of aluminium alloy 6061 from combined environments of marine and high temperature. Present study pertains to development of polymeric coating with aluminium metal phosphate with appropriate fillers to withstand 500 deg C with a thermal gradient of 400 deg C for duration of 2 minutes. Various pre-treatments of the base metal have been carried out and adhesion, thermal resistance, potentio-dynamic polarization and impedance tests are conducted to establish thermal and corrosion resistance of the developed coating. Additives of zirconium oxide, silica and some organic fibers in the coating have been optimized to 30% to achieve maximum adhesion strength. Significant increase in thermal and corrosion resistance of base metal has been achieved with present coating system for 6061 Al-alloy.


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    Title :

    Protection of AA 6061 alloy from combined environmental corrosion for aerospace applications


    Additional title:

    Korrosionsschutz einer AA6061 Legierung unter kombinierten Umgebungseinflüssen für Luftfahrtanwendungen


    Contributors:
    Rao, K.S. (author) / Sreedhar, N. (author) / Rao, B.M. (author) / Rao, K.P. (author)


    Publication date :

    2004


    Size :

    5 Seiten, 4 Bilder, 2 Tabellen, 8 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Corrosion and protection of aerospace materials

    Institute of Corrosion; Corrosion Science Division / Defence Research Agency | British Library Conference Proceedings | 1994