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Hot dip galvanizing

Discussion in 'Early CJ5 and CJ6 Tech' started by LXXIV_CJ, Nov 17, 2010.

  1. Nov 17, 2010
    LXXIV_CJ

    LXXIV_CJ Member

    Manassas, VA
    Joined:
    Nov 15, 2010
    Messages:
    116
    Is this a good option for frames? I wanted to get my frame blasted and hot dipped, then painted over. Thoughts?
     
  2. Nov 17, 2010
    '74Renegade

    '74Renegade Active Member

    Fair Oaks, CA
    Joined:
    Sep 1, 2005
    Messages:
    1,275
    Seems to work well for boat trailers that see salt water, I am not sure you can paint it though.
     
  3. Nov 17, 2010
    pwrinkle

    pwrinkle Member

    Alvaton Kentucky
    Joined:
    Mar 4, 2010
    Messages:
    93
    it can be painted...or at least we have painted galvanized steel. it takes a little thicker coat.
     
  4. Nov 17, 2010
    Admiral Cray

    Admiral Cray I want to do this again.. Staff Member

    Bainbridge...
    Joined:
    Sep 21, 2009
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    204,347
    It is dangerous and not fun to weld the frame once it is galvanized. You will need to remove the galvanizing on both sides in the area to weld. Fumes will kill you.
     
  5. Nov 17, 2010
    DREDnot

    DREDnot Not new to JEEPS

    AZ
    Joined:
    Feb 7, 2010
    Messages:
    646
    It turns out to be an old welders tale. The fumes won't kill you but can make you sick enough that you think it is.(metal fume fever) The fumes are just zinc oxide. The same stuff that lifeguards put on their noses.

    http://www.osha.gov/doc/outreachtraining/htmlfiles/weldhlth.html

    Galvanized frames are the way to go in the Land Rover restoration circles.
    They usually leave them unpainted. Looks cool that way.
     
  6. Nov 18, 2010
    bob m

    bob m Member

    miami, fl
    Joined:
    Oct 5, 2010
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    88
    If memory serves me, working on a new FPL substation 30 years ago, the painter was wiping down galvanized doors with vinegar before painting.
     
  7. Nov 18, 2010
    Steve's 70-5

    Steve's 70-5 Active Member

    Louisville, Ky
    Joined:
    Nov 12, 2009
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    1,381
    A friend has a sheet metal shop and he said to wipe the galvanized down with diluted muriatic acid, when I painted some in the past
     
  8. Nov 19, 2010
    AKCJ

    AKCJ Active Member

    Fairbanks, Alaska
    Joined:
    Aug 12, 2003
    Messages:
    1,035

    Galvanized fumes are not good to breath. Be careful and use good ventilation when welding galvanized.
     
  9. Nov 19, 2010
    AKCJ

    AKCJ Active Member

    Fairbanks, Alaska
    Joined:
    Aug 12, 2003
    Messages:
    1,035

    Yes, etch the galvanized with a weak acid solution. Gives a place for the primer to grab on to. I prefer the metal etch from the body shop. Just did some Tuesday night.
     
  10. Nov 19, 2010
    '74Renegade

    '74Renegade Active Member

    Fair Oaks, CA
    Joined:
    Sep 1, 2005
    Messages:
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    There are two types of galvanizing, Hot Dip and Electoplate. From my limited experience in the marine industry, Hot Dip leaves a thick dirty finish. When you touch it zinc oxide comes off on to your hands. Electroplate leaves a smooth clean finish, that seems to be more suitable for etching and painting.
     
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