Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Galvanized sheet metal...

Discussion in 'The Garage' started by 84gmcjimmy, May 18, 2004.

  1. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    Okay, this is probaly a repost but I have my own questions... what do I have to do to get the galvanized finish off of sheet metal? Can I just grind it off with a grinder? I will be welding it so it has to be clean. It's not very big... it's just metal roofing stuff my dad had from a job. Any help is great /forums/images/graemlins/thumb.gif
     
  2. kennyw

    kennyw N9PHW Premium Member

    Joined:
    Jun 9, 2002
    Posts:
    13,224
    Likes Received:
    94
    Location:
    Stevens Pass Highway, WA
    I dont think you should weld on it without a resperator. That stuff is DEADLY when the gasses are released during welding. I dont think you can just grind off the top layer like it is paint or rust either.
     
  3. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    My dad bought these little mask things... like dust masks for dust... but there like for this I think. Is it the right thing?
     
  4. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

    Joined:
    Dec 15, 2002
    Posts:
    15,142
    Likes Received:
    572
    Location:
    Iowa
    You can grind the galvanizing off to get a decent weld but what a pain. Yes the fumes are poisonous but I'd be lying if I said I would never weld it without a respirator. Just flip your hood down and hold your breath. /forums/images/graemlins/histerical.gif
     
  5. 84gmcjimmy

    84gmcjimmy 1 ton status

    Joined:
    Dec 3, 2003
    Posts:
    12,838
    Likes Received:
    0
    Location:
    B.C. CANADA
    Maybe I won't weld this stuff... Sounds to scary for me /forums/images/graemlins/yikes.gif
     
  6. namkrow

    namkrow 1/2 ton status

    Joined:
    Apr 25, 2004
    Posts:
    166
    Likes Received:
    0
    Location:
    So Cal
    I'll second the "just flip the visor down and hold your breath" method.

    I use a far placed about 20 ft away. kind of just moves the air a little, not blowing hard.

    Also, turn up the gas a little if you're going to do this (or else the gas shield might not totally encompass your weld during welding)
     
  7. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    If you do weld it use the dust mask and also set up a fan at a 90* angle to you so there is a crosswind when you weld and some of the fumes will be carried off. It may carry away some of the shielding gas but it is good to get those fumes away.

    Weld little section while holding your breath. Weld a small section then leave. Let the fumes clear out and weld another section.

    Try to breath in as little as possible. The fumes from welding on it once in awhile shouldn't kill you but it isn't good for you so don't do it to often.

    Harley
     
  8. smokkey1

    smokkey1 1/2 ton status

    Joined:
    Jan 7, 2004
    Posts:
    2,677
    Likes Received:
    2
    Location:
    Los Angeles, CA
    if I remember right. when I was working at my dads shop I use to use some sort of acid. but that was like 5 years ago. my dad is around here somwewhere I'll ask him.
     
  9. big jimmy 91

    big jimmy 91 1/2 ton status

    Joined:
    Feb 21, 2004
    Posts:
    639
    Likes Received:
    0
    Location:
    Northwestern Ontario Canada
    Just grind it , weld it , and try not to breath in the stuff that floats around and looks like snow /forums/images/graemlins/rotfl.gif
    Do go to your local welding supplier and purchase a proper welding respirator in your price range
    If you value your health don't weld alot without one
    I know this because I do it for a living
    BTW you only have to grind off a narrow amount of the coating where you are welding , do some test welds and you will see how little grinding is required /forums/images/graemlins/thumb.gif
    Hope this helps you out
     
  10. big jimmy 91

    big jimmy 91 1/2 ton status

    Joined:
    Feb 21, 2004
    Posts:
    639
    Likes Received:
    0
    Location:
    Northwestern Ontario Canada
    We use muriatic acid for soldering galvanized metal , that's probably what you are thinking of.
     
  11. smokkey1

    smokkey1 1/2 ton status

    Joined:
    Jan 7, 2004
    Posts:
    2,677
    Likes Received:
    2
    Location:
    Los Angeles, CA
    [ QUOTE ]
    We use muriatic acid for soldering galvanized metal , that's probably what you are thinking of.

    [/ QUOTE ]


    there you go /forums/images/graemlins/thumb.gif man I hated soldering. espically when I had to do real hug drain pans.
     

Share This Page