Hexavalent chromium-containing baths have traditionally been used as pre-treatments on magnesium alloys. Environmentally friendly alternatives to these baths are being investigated. One alternative seems to be a phosphate-permanganate treatment consisting of a mixture of sodium dihydrogenphosphate and potassium permanganate. The phosphate-permanganate treatment has shown equivalent performance to a standard chrome pickle, both as stand-alone corrosion protection and as a base for subsequent coating. Phosphate-permanganate treatments must be combined with a deoxidizing process to be successful. Another alternative is a fluorozirconate treatment. The paint base properties of fluorozirconate are quite close to what is obtained using a chrome pickle.


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    Titel :

    Non-Chromate Conversion Coatings for Magnesium Die Castings


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Albright, Darryl (Autor:in) / Skar, Jan Ivar (Autor:in) / Walter, Manfred (Autor:in)

    Kongress:

    International Congress & Exposition ; 1997



    Erscheinungsdatum :

    24.02.1997




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Non-chromate conversion coatings for magnesium die castings

    Skar,J.I. / Walter,M. / Albright,D. et al. | Kraftfahrwesen | 1997


    Non-Chromate Conversion Coatings for Magnesium Die Castings

    Skar, J. I. / Walter, M. / Albright, D. et al. | British Library Conference Proceedings | 1997




    Processing and Properties of Chromate-Free Talc Conversion Coatings for Aluminum

    Buchheit, R. G. / NACE Unit Committee T-14A on Automotive Corrosion / Society of Automotive Engineers; Automotive Corrosion and Prevention Committee et al. | British Library Conference Proceedings | 1995