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Unread 11-05-2008, 08:40 AM   #1
5artist5
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Galvanize Removal

I have some galvanized pipe i need to weld and then continue to heat up real hot on a regular basis. How can I remove the galvanize? I glass bead blasted the outside and that seemed to work pretty good I think but it there something I can dip them in to eat away any leftover stuff and anything on the inside?

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Unread 11-05-2008, 08:44 AM   #2
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maybe an acid wash?
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Unread 11-05-2008, 08:46 AM   #3
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good question. i dont know, but i know welding galvanized pipe isn't good for you. Makes you sick and supposedly removes calcium from your bones (old wives tale?)

http://www.sperkoengineering.com/htm...Galvanized.pdf
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Unread 11-05-2008, 09:51 AM   #4
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metal fume fever may be in your future... use a respirator and an exhaust
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Unread 11-05-2008, 09:57 AM   #5
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do you have to use galvanized steel?
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Unread 11-05-2008, 10:31 AM   #6
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do you have to use galvanized steel?
Well that's what I have. None of the home supply stores carry black pipe in big enough dia. for what I need.
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Unread 11-05-2008, 10:56 AM   #7
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An acid bath is the only thing I can think of. Nasty stuff.


Side note: whatcha makin???
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Unread 11-05-2008, 10:58 AM   #8
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What sort of acid and where would I get it?

I am making a small gas forge. These pipes will hold the burners.
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Unread 11-05-2008, 11:02 AM   #9
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Quote:
Originally Posted by 5artist5 View Post
What sort of acid and where would I get it?

I am making a small gas forge. These pipes will hold the burners.

The only time I have had stuff acid washed was when I paid for it so I do not know the name. Your gonna want to get that pipe REALLY CLEAN for what your making.

Maybe a muriadic acid or the like. check with a local metal platter. They would be in the know on what to use.
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Unread 11-05-2008, 07:54 PM   #10
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Muriatic Acid will take off the zinc. Not sure how to do it without leaving a "zinc residue" though.. maybe wash it a few times?
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Unread 11-05-2008, 08:31 PM   #11
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Muriatic Acid will take off the zinc. Not sure how to do it without leaving a "zinc residue" though.. maybe wash it a few times?
isnt that stuff really nasty? Like inhalation hazard bad? its HCl, so its like take the skin off your hand bad, then has nasty fumes that will kill you bad. I'd think you'd need to completely submerse the metal too. Maybe the galvanized welding is the lesser of two evils....

http://en.wikipedia.org/wiki/Hydrochloric_acid

maybe check the local steel supply stores and see if they have any scrap Schedule laying around from other orders.
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Unread 11-05-2008, 08:34 PM   #12
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Drink a glass of milk before and after welding or grinding anything galvanized and you won't get sick.
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Unread 11-05-2008, 09:00 PM   #13
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wire wheel, flap disc or just weld it and use a respirator
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Unread 11-06-2008, 09:14 PM   #14
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Quote:
Originally Posted by 5artist5 View Post
Well that's what I have. None of the home supply stores carry black pipe in big enough dia. for what I need.
too bad your not in texas i had alot of pipe
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Unread 11-07-2008, 06:46 AM   #15
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Quote:
Originally Posted by Unlimited04 View Post
isnt that stuff really nasty? Like inhalation hazard bad? its HCl, so its like take the skin off your hand bad, then has nasty fumes that will kill you bad. I'd think you'd need to completely submerse the metal too. Maybe the galvanized welding is the lesser of two evils....

http://en.wikipedia.org/wiki/Hydrochloric_acid

maybe check the local steel supply stores and see if they have any scrap Schedule laying around from other orders.


It is nasty stuff. I have a tank that I built that has a solution of Muriatic Acid and water. I use it to clean mill scale off my bumpers.

I use a respirator and face shield when messing with it. Yeah.. it burns the cuts in your hands a bit if you submerge them.

You could also fill a spray bottle with a 50/50 mix of acid/water and spray the pipe down outdoors and then rinse with water. I used to clean my bumpers that way.

But.. um.. yeah.. Muriatic Acid is nasty.
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