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Painting Mobile Home Aluminum Windows

  • 26-10-2014 5:36pm
    #1
    nicnac
    Registered Users Posts: 247 ✭✭


    I have a 12 year old mobile with single glazed windows. In spots the white paint has started to bubble and pieces have come off. The bare alluminium can be seen.

    I am concerned about rust. How should I treat it?


Comments

  • #2
    [Deleted User]
    Posts: 5,238 ✭✭✭[Deleted User]


    Aluminum doesn't rust.


  • #3
    *Kol*
    Registered Users Posts: 2,549 ✭✭✭*Kol*


    Aluminum will corrode if exposed. It will look like a white powder. Best thing is to sand, prime and paint with a primer suitable for aluminum.


  • #4
    [Deleted User]
    Posts: 5,238 ✭✭✭[Deleted User]


    The corrosion is a protective layer, like copper.


  • #5
    *Kol*
    Registered Users Posts: 2,549 ✭✭✭*Kol*


    Sir Liamalot wrote: »
    The corrosion is a protective layer, like copper.

    No it's not at all. I have seen plenty of corrosion on aluminum and I can assure you it's quite the opposite.


  • #6
    [Deleted User]
    Posts: 5,238 ✭✭✭[Deleted User]


    How long does it last untreated? I've loadsa chequered plate out in the elements.


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  • #7
    *Kol*
    Registered Users Posts: 2,549 ✭✭✭*Kol*


    It depends on the alloy and the conditions, and if the plate is treated. A lot of alloys have a clear anodized coating.


  • #8
    moodrater
    Closed Accounts Posts: 1,638 ✭✭✭moodrater


    http://www.aluminiumdesign.net/design-support/aluminium-corrosion-resistance/

    It will only corrode with electrolyte like salt spray for seaside mobilehome, acid rain etc my old school and most of the houses around it have uncoated windows approaching 40 years old with no significant pitting or corrosion.

    The problem with peeling paint/ coatings is that water salt , cleaning detergents etc gets trapped and many cycles of evaporation can concentrate deposits in the pockets and canuse pitting.its probably sufficient to remove loose material in the lifespan of the typical window.


  • #9
    nicnac
    Registered Users Posts: 247 ✭✭nicnac


    Thanks all for your feedback on this. Next time I am at the mobile I will take a picture and upload it.
    I haven't a clue whether or not the aluminium is treated, or in fact, am only assuming it is aluminium!


  • #10
    [Deleted User]
    Posts: 5,238 ✭✭✭[Deleted User]


    If a fridge magnet won't stick to the metal I wouldn't be fussed about paint unless it's cosmetic.


  • #11
    gctest50
    Registered Users Posts: 9,605 ✭✭✭gctest50


    Sir Liamalot wrote: »
    The corrosion is a protective layer, like copper.

    yip, and once that layer is gets damaged and there is salt in the air it will all go wrong

    you end up with hydrogen out of it, attracts the chlorine out of the salt and you get hydrochloric acid

    hydrochoric acid and aluminium get on well together :

    https://www.youtube.com/watch?v=LaaORZ0ofCY


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