It sounds plausible enough. The main danger comes from the chlorine
component of tetrachoroethylene - there are way too many corrosive gases
that you can easily create by heating that stuff.
By comparison, here's a link to an MSDS for a carb cleaner product:
http://www.emzone.ca/MSDS-emzone-44009-G9-Air%20Intake%20Carb%20&%20Chok
e%20Cleaner.pdf
Some very volatile compounds (explosion or fire hazard) but they're all
hydrocarbons (some containing oxygen, some not) so that limits the range
of combustion products. Still, not necessarily good - a common byproduct
of incomplete alcohol combustion is formaldehyde.
So... clean and dry your materials before welding!
Theo
> -----Original Message-----
> From: tigers-bounces@autox.team.net
> [mailto:tigers-bounces@autox.team.net] On Behalf Of A. C. Tynes
> Sent: July 23, 2009 2:36 PM
> To: tigers@autox.team.net
> Subject: [Tigers] Brake cleaner danger
>
> Below is a link from my motorcycle list to an article written
> by a guy who used brake cleaner as a metal cleaner before welding.
>
> http://www.brewracingframes.com/id75.htm
>
> I'm not a welder, but it sounded scary enough to pass on,
> even if it turns out to be another internet hoax.
>
> A. C. Tynes
> New Orleans
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