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Study of Chromium in Gas Metal Arc Welding Fume
| Content Provider | Semantic Scholar |
|---|---|
| Author | Eagar, Thomas W. Sreekanthan, Pradeep Jenkins, Neil T. |
| Copyright Year | 2004 |
| Abstract | Recent OSHA mandates have greatly reduced the permissible exposure levels (PEL) to hexavalent chromium (Cr VI), a known human carcinogen. Because the amount of Cr VI in welding fumes is uncertain, a study was undertaken to understand the influence of shielding and fluxes on the composition and oxidation states of various metals in welding fume, in particular that of gas metal arc welding (GMAW). Both thermodynamic calculations and experiments show the presence of minor amounts (less than 0.3 wt% of fume) of Cr VI in the fume in the absence of fluxes. This amount appears to be a function of the shielding gas used. Because the oxidation state of chromium can change through interaction with the environment, studies were performed which showed that fresh fume produced a greater response in animal lungs than fume which had been aged for 24 hours in air. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://eagar.mit.edu/Publications/Eagar174.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
