Welding galvanized steel

Discussion in 'Shop Talk' started by hayzor, Nov 15, 2005.

  1. hayzor

    hayzor Well-Known Member

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    Any problems welding galvanived steel?
    I've heard that the galvanized coating gives off a poisionous gas.
    If it does, can the galvanized coating be ground off?

    Thanks
     
  2. farminghandyman

    farminghandyman Well-Known Member Supporter

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    yes the fumes can make one sick,
    the galvanizing can cause problems in weld strength,
    you can try to grind it off, many times it just smears around,
    it will burn off with a torch,
    and then wire brush it,

    but I would try to grind it and then weld do in a well ventilated area,

    some times after the first bead is ran one can wire brush off enough to make a good weld with out the zinc causing problems,
     

  3. celticfalcon

    celticfalcon tom

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    mid michigan
    yes you can weld it without grinding it. but i would be in a out door setting or a very well ventilated area.tig,arc,or mig could make a diff too.
    it also depends on how much you r welding.a small amount wont hurt u but if your talking alot then go with outside
     
  4. longrider

    longrider Southern Gent

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    yes you can weld it, but, it wont be a full strength weldment. cause you'll have zinc and a few other contaminates in your weld causing weakness. you would have to grind off the zinc compound before welding. the trouble with that is that most galvinized metals are fencing material type stuff. which are too, too thin to grind. you need to get that stuff off and down to bare metal to weld it up to full strength. If you are welding a thicker material like a boat trailor then grinding wont be a problem and you can weld it up normally.



    as with any weld fumes, dont be daft and stick your head in the smoke plume.
     
  5. shadowwalker

    shadowwalker Well-Known Member

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    wyoming/ now tennessee
    In a pinch you can get a fan to blow the smoke away from you. This is not a 100% good deal but it is better than nothing. Worked in the oilpatch for seveal years, and then we found out what we were breathing and they got a better ventilation system. shadowwalker
     
  6. jefferson

    jefferson fuzzball in the Cascades

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    weld outside. Drink lots of milk, eat chease and butter. Zinc poisoning sucks, make you feel like you got the flu.