WELDERS BE CAUTIOUS!!! PLEASE READ - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 7 Old 07-26-2009, 11:13 PM Thread Starter
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WELDERS BE CAUTIOUS!!! PLEASE READ

I picked this up on another site.


http://i32.tinypic.com/x2thl3.jpg

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post #2 of 7 Old 07-26-2009, 11:24 PM
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Damn.....

Give me a few and I will find the MSDS for the brake cleaner.
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post #3 of 7 Old 07-26-2009, 11:28 PM
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MSDS
http://www.gunk.com/msds/M720.pdf

Cliffs Notes:
X. Stability and Reactivity:
Open flames, hot glowing surfaces. Liquid oxygen or other strong oxidants can form explosive mixtures of perchloroethylene
Incompatibility (Materials to Avoid):
In the presence of water: hydrochloric acid. Ignition sources and hot metals surfaces: phosgene and chlorine. Flames, welding,
and high temperatures induce decomposition.

Last edited by Mr.RonGilbert; 07-26-2009 at 11:38 PM.
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post #4 of 7 Old 07-27-2009, 12:38 AM
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Damn!
Duly noted - thanks for passing along the warning!
I'm horrible about not making sure metal is perfectly clean/dry before I weld it, guess i'll be a little more careful from now on!

I was working in a 3500 gallon display tank at the zoo, we had just drained it and were changing out the 12" deep gravel bed. The guy I was working with and myself kept getting dizzy and headachy after being down in the tank for more than about 10 minutes, last time down I could barely climb the rock work to get back out.
Then it occurred to me, the reason we were changing out the substrate was I had diagnosed that the original tank design was flawed and it had built up deposits of hydrogen sulfide gas in the gravel, a big rock shifted and released enough into the water to kill all of the fish. Then I remembered hydrogen sulfide gas is heavier than air and realized we were down in a big tank of it breathing it.
DUH, felt pretty dumb, added a few fans, waited a couple of hours and every thing was fine, but if we had passed out down there like we almost did, it coulda been a different situation.

poisonous gasses are just a tiny mistake away everywhere we go!


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post #5 of 7 Old 07-27-2009, 07:43 AM
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Here is a substance that is more danagerous.....

http://chemsoc.velp.info/msds-woman.html

Be very careful handling this.....

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post #6 of 7 Old 07-27-2009, 01:53 PM
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Tetrachloroethylene is very toxic, the short term exposure limit is 100 PPM. I try to keep clear of brake cleaner altogether. If inhaled, phosgene produces hydrogen chloride in the lungs, very nasty. You should never weld near any chlorinated solvent.

I generally don't use anything on areas to be welded, apart from a grinder/sander/etc, but it is a very good reminder how dangerous some of these chemicals can be.
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post #7 of 7 Old 07-27-2009, 03:41 PM
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Any type of CHLORIDE in the lungs can turn to fluid.
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