Before we dismiss this subject... I'm sitting here with a can of brake
cleaner (CRC Brakleen) in my hand and the warning label specifically says
"...do not use this product near open flames, welding operations,...Vapors
may decompose to harmful or fatal corrosive gases such as hydrogen chloride
and possibly phosgene"
That's good enough for me. The original story may or may not have happened
as reported, but the science appears sound.
Myth confirmed, don't torch the stuff.
Darrell R
-----Original Message-----
From: 6pack-bounces@autox.team.net [mailto:6pack-bounces@autox.team.net] On
Behalf Of Sally or Dick Taylor
Sent: Tuesday, January 12, 2010 2:41 AM
To: Grego Sanguinetti; 6pack@autox.team.net
Subject: Re: [6pack] brake cleaner and welding warning 2
OK, brake cleaner and other solvents aren't good to breathe, and worse when
trapped or concentrated under a welding helmet. In re-reading the article in
the "Iron" magazine, the writer says he followed his "normal proceedure of
using an acetylene torch to burn off any residue". (Normally only goggles
need be used with acetylene). If he had used such a torch, why was there
anything left to create the vapors that put his health in such peril when
then going on to use the TIG welder? Som ting missin'!?
Michael's reply was right on the money, particularly about the inert gas and
it's oxygen shielding duty. (I couldn't think of this and substituted
"deoxidizer" in it's place, which wasn't correct).
So now I'll shut up...and read some of the Material Safety Data Sheets that
was sent my way.
Dick
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