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Powdercoating Aluminum

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  • DALE
    replied
    Sandblasting does rough the surface and yes it helps but for different reasons.1- by roughing the surface you increase the surface area slightly.
    2 you create places for the powder to physically get in to the nooks and basically hold on.
    3- it physically cleans the surface of paint,dirt and oils that prevent adhesion.

    Zinc is a conversion coating that attaches to the aluminum and then the powder bonds to the zinc. <- this is over simplified but you get the idea.

    Leave a comment:


  • texasbulldog
    replied
    Originally posted by DALE
    No, it's not needed but it does help promote adhesion.
    What do you think of a light sand blasting instead? Would that be as an effective foundation as the zinc.

    TIA

    Karl

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  • gglines
    replied
    Thanks Dale!

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  • DALE
    replied
    No, it's not needed but it does help promote adhesion.

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  • gglines
    started a topic Powdercoating Aluminum

    Powdercoating Aluminum

    Do you need to zinc chromate aluminum before powder-coating it?

    Thanks,

    George
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