T*O*S*S*E*Rs summer laning & BBQ day

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i am indoors (garidge), weldering side to side at the mo, with gas, but not doing to much weldering - only the fabricated parts. Main bit will be outside most likely
 
redhand said:
Aye yer gets a good ole dose of Phosgene gas (Mustard gas to yu owld bastids)
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Oh no yer don't... Phosgene breaks down with heat, anything over 200 degrees or so and weldering is a little bit 'otter than that ;)
 
that link yu sent me, Pikey, doesnt mention Phosgene, Cyanide or any toxic substances - in fact it specifically states "When zinc vapor mixes with the oxygen in the air, it reacts instantly to become zinc oxide. Zinc oxide is non-toxic and non carcinogenic. Zinc oxide that is inhaled is simply absorbed and eliminated by the body without complications or chronic effects."

what it does say is "Current research on zinc oxide fumes is concentrated in establishing the mechanism by which zinc oxide causes "metal fume fever."
Typical “metal fume fever” begins about 4 hours after exposure, and full recovery occurs within 48 hours. The symptoms include fever, chills, thirst, headache and nausea."

so no nasties - just a 48 bout of "flu" if yo unlucky. I am deliberately only welding about 15 mins at a time. At the mo - about 15 mins a week!.
 
DTZ said:
Oh no yer don't... Phosgene breaks down with heat, anything over 200 degrees or so and weldering is a little bit 'otter than that ;)
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Not quite It is produced by exposing solvents and degreasers (of the sort used on metals which have been galvanised) to intense UV light I:E a welding arc.

Ultraviolet rays given off by welding can react with chlorinated hydrocarbon solvents, such as trichloroethylene, 1,1,1-trichloroethane, methylene chloride, and perchloroethylene, to form phosgene gas. Even a very small amount of phosgene may be deadly, although early symptoms of exposure -- dizziness, chills, and cough -- usually take 5 or 6 hours to appear. Arc welding should never be performed within 200 feet of degreasing equipment or solvents.
 
The Mad Hat Man said:
that link yu sent me, Pikey, doesnt mention Phosgene, Cyanide or any toxic substances - in fact it specifically states "When zinc vapor mixes with the oxygen in the air, it reacts instantly to become zinc oxide. Zinc oxide is non-toxic and non carcinogenic. Zinc oxide that is inhaled is simply absorbed and eliminated by the body without complications or chronic effects."

what it does say is "Current research on zinc oxide fumes is concentrated in establishing the mechanism by which zinc oxide causes "metal fume fever."
Typical “metal fume fever” begins about 4 hours after exposure, and full recovery occurs within 48 hours. The symptoms include fever, chills, thirst, headache and nausea."

so no nasties - just a 48 bout of "flu" if yo unlucky. I am deliberately only welding about 15 mins at a time. At the mo - about 15 mins a week!.
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Read this it should put the willies up yer. But been Septic they tend to overstate the dangers of everything... AFSCME - Welding
 
redhand said:
Not quite It is produced by exposing solvents and degreasers (of the sort used on metals which have been galvanised) to intense UV light I:E a welding arc.

Ultraviolet rays given off by welding can react with chlorinated hydrocarbon solvents, such as trichloroethylene, 1,1,1-trichloroethane, methylene chloride, and perchloroethylene, to form phosgene gas. Even a very small amount of phosgene may be deadly, although early symptoms of exposure -- dizziness, chills, and cough -- usually take 5 or 6 hours to appear. Arc welding should never be performed within 200 feet of degreasing equipment or solvents.
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Lucky I aint gorra degreasing plant in mee garidge then - init? If yu is saying anything that might have been degreased, then that applies to any metal that is likely to be welded using a process which gives orf UV - ie anty MIG welding, and I aint seen anyone using mig welding gear normally, wearing a respirator.
 
redhand said:
Not quite It is produced by exposing solvents and degreasers (of the sort used on metals which have been galvanised) to intense UV light I:E a welding arc.

Ultraviolet rays given off by welding can react with chlorinated hydrocarbon solvents, such as trichloroethylene, 1,1,1-trichloroethane, methylene chloride, and perchloroethylene, to form phosgene gas. Even a very small amount of phosgene may be deadly, although early symptoms of exposure -- dizziness, chills, and cough -- usually take 5 or 6 hours to appear. Arc welding should never be performed within 200 feet of degreasing equipment or solvents.
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I think you might be confusing the issue here mate...

There isn't going to be any of those solvents left after either hot dip or electrogalv, definitely not in the case of hot dip, their boiling points are too low. Granted if you spilt a bottle of tippex thinners, or sprayed a car panel the day before in the same garage and then did some welding you'd get one hell of a belt.

Chances of making phosgene by welding galv'd steel outside, particularly hot dipped galv, that was cleaned prior to galving with any of the solvents listed above = 0

Chances of making phosgene by welding anything, galv'd or not, in your garage where you store and use any car painting equipment or materials... quite good I'd reckon.
 
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