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Tool Talk Discussion Forum

Re: When did zinc fumes become deadly?

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sheiserman

03-26-2013 18:55:22
74.47.161.225



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Never have had a problem with the fumes off galvanized material.

The big thing a few years back here was the hexavalent chromium terror. It would devastate all that dared breathe it. I was tested, and failed. That was the end of it. I guess the cost of mitigating that hazard wasn't worth it.

One thing we have nailed down is brake parts cleaner. Welding within 50 feet of that stuff produces a smell I can't describe. I will chew the galvanizing off grating before I strike an arc anywhere near where brake cleaner was used.

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Stan in Oly, WA

03-26-2013 21:39:51
174.31.210.179



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 Re: When did zinc fumes become deadly? in reply to sheiserman, 03-26-2013 18:55:22  
An electric arc that burns brake parts cleaner (just the residue on metal cleaned with it is enough) produces phosgene gas, one of the most toxic poison gases used in WWI. Supposedly, a single whiff of it is enough to do irreversible damage to a person's kidneys and liver. Just because I think that the danger of zinc fumes is commonly exaggerated, that doesn't mean I don't believe anything is dangerous.

Stan

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D beatty

03-27-2013 06:51:37
50.151.124.6



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 Re: When did zinc fumes become deadly? in reply to Stan in Oly, WA, 03-26-2013 21:39:51  
The chemical that produces phosgene gas is carbon tetrachloride and that is when its burned . Thats the reason why you can't buy or refill a carbon tetrachloride fire extinguisher. Carbon tetrachloride will neutralize gasoline. My dad used it when repairing gas tanks. He would drain gas tank and shoot tank with carbon tetrachloride and than welded or brazed tank. He always did it outside and on a day with a go breeze to carry fumes away.

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Bernie/MA

03-27-2013 12:14:19
67.142.166.20



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 Re: When did zinc fumes become deadly? in reply to D beatty, 03-27-2013 06:51:37  
I don't know if phosgene gas comes from carbon tet or not but I know it comes from dry cleaning fuid called perk (perchol someting or other). I used Brakleen to clean aluminum before mig welding until they took the perk out of it. Took a lot of label reading before I could find it again in another product.



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D beatty

03-27-2013 20:28:40
50.151.124.6



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 Re: When did zinc fumes become deadly? in reply to Bernie/MA, 03-27-2013 12:14:19  
Carbon Tetrachloride was been used in dry cleaning and if it comes in contact with fire it forms phosgene gas. If you look up Carbon Tetrachlorde and phogene gas you can get the whole story about it.



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Dusty MI

03-28-2013 06:07:27
76.250.62.134



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 Re: When did zinc fumes become deadly? in reply to D beatty, 03-27-2013 20:28:40  
I seam to remember that carbon tet. was used in fire extinguishers.



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sheiserman

03-27-2013 03:33:45
74.47.161.225



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 Re: When did zinc fumes become deadly? in reply to Stan in Oly, WA, 03-26-2013 21:39:51  
I do remember the term phosgene being associated with brake parts cleaner now that you mention it. I could be led to believe a concentrated whiff of the stuff could do damage. It's an awful smell.

This stuff affects everyone differently. It's like getting shocked. Some people are really sensitive to it, and others rarely feel a thing.



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