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Warning when welding please read this
jacko - 30/3/17 at 05:41 PM

http://www.garagejournal.com/forum/showthread.php?t=312386

Some may know about this some may not
I have been welding for about 45 to 50 years and i cant think i have ever read or herd about this
jacko

loggyboy - 30/3/17 at 05:44 PM

Sounds nasty - However most of the brake cleaners i've used have evaporated in seconds, do they leave something behind or was this guy just using copious amounts with no gap before welding?

Slimy38 - 30/3/17 at 06:06 PM

I don't think I've ever heard about this either, and I saw all sorts of 'danger' posts about welding.

Having said that, I get the best weld from mechanically cleaned metal, a rough angle ground surface seems to work best. I even try and 'key' clean metal, it might just be wishful thinking but it does seem to help.

r1_pete - 30/3/17 at 06:12 PM

Must admit I mechanically clean, have never considered using solvents, to me clean metal means bright / abraded.

Other than exotics like titanium, does it actually do any good? From that warning it adds too much risk by the sound of it.

jtskips - 30/3/17 at 06:36 PM

strangely its great stuff for starting diesels

[Edited on 31/3/17 by jtskips]

gremlin1234 - 30/3/17 at 06:54 PM

I have seen these warnings before, and yes you should be concerned,
but the usual problem is where parts have been sprayed clean, and puddles of the stuff accumulate in dips in exhaust manifolds and such like.

jacko - 30/3/17 at 06:59 PM

quote:
Originally posted by r1_pete
Must admit I mechanically clean, have never considered using solvents, to me clean metal means bright / abraded.

Other than exotics like titanium, does it actually do any good? From that warning it adds too much risk by the sound of it.



How do you clean box section when it comes covered in greasy /oil from the stockist

We use cellulose thinners but are we doing right ?

Bluemoon - 30/3/17 at 07:35 PM

I think it might be the Trichloroethane that's the problem, I had thought this was band in the EU now (used to be used for dry-cleaning??...) it's also a carcinogen...

[Edited on 30/3/17 by Bluemoon]

MikeRJ - 30/3/17 at 07:49 PM

This is only a problem with chlorinated brake cleaners e.g. ones that include Trichloroethane. You can buy brake cleaners that aren't chlorinated, but obviously there is a still a fire risk.

DJT - 31/3/17 at 02:27 PM

Think I saw brake cleaner igniting from welding on YouTube recently. Roadkill perhaps?