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Wait. You shouldn't combine a flammable spray/residue with a high temperature welding?
Colour me shocked.
I do not weld but could see myself making this mistake without having been informed.
I use brake clean as a basic cleaner for a lot of things in my garage as it does a pretty good job and also evaporates quickly without leaving a residue.
The story tracks my general experiences pretty well
I would guess this mistake is much more common as brake clean is used as a general cleaner by a lot of people
This definitely reeks of intentional stupidity and bernard and styro are both part of the group of maker youtubers who are openly doing whatever it takes for views.
That said, this one is at least somewhat plausible. Someone cleans a part with a small amount and a scrub and figures that they'll just burn it off because they are lazy and don't care about residue ruining the weld. Whether that will be enough to be meaningfully harmful is an open question
But I can't think of any situation where you would need enough solvent to remove the rust AND not wipe a part down because it has been soaking for an hour before you took the wire brush to it. At which point this is mostly in the same realm of "only weld in well ventilated places and consider a respirator under that mask" which everyone should do but nobody does.
Solvent does not remove rust.
You degrease the part, then manually remove the rust, then clean with the solvent just before welding. Acetone or alcohol are better cleaners for weld prep than brake cleaner. These solvents are volatile enough that most of the time, the part is dry and not-flammable by the time you get your gear on and are ready to weld.
The really damaging thing here is not the fire but if you use chlorinated brake cleaner when welding it created concentrated chlorine gas and will kill you.
Welding produces a ton of nasty fumes and you should ALWAYS be wearing a welding rated respirator and using a fume extractor when welding, especially with flux core, galvanized, or stainless unless you want extra nasty cancer.
It's not very likely to occur but if you watched the video you'd see that this was a real case that occurred.
There are isolated cases of EVERYTHING. People will do anything with everything and that is why OSHA et al are such complicated messes.
Its the difference between possible and plausible.
OK but the point of ChubbyEmu videos isn't "this thing is GOING TO KILL YOU," it's "look at this weird thing that happened and the toxicology behind it,." In fact, he goes out of his way to reassure people that these things aren't likely to happen in the videos where viewers might get anxious, like the cases involving leftovers. There's been a couple videos where he's straight-up said "this was a freak accident."
More generally, the fact that the events aren't likely is part of what can make case studies valuable; i.e. "this sequence of events is highly unlikely to happen again in this specific way, so let's examine it closely and see what we can learn from it."
YSK it’s a bad idea to stick a fork into a wall outlet
Flammability has nothing to do with it. Read the description and look up phosgene.
The point of brake cleaner is that it's not supposed to leave a residue. It's not actually meant to be a general parts degreaser, but rather a braking surface cleaner. But being able to remove oils without additional water has made it the WD40 of mechanical cleaners. Rarely the right product , but often right enough.