PMID: 7939588Jun 30, 1994Paper

Exposure to cobalt in the welding process with stellite

The Science of the Total Environment
F FerriO Sala


In some small factories producing moulds for ceramic tiles using a cobalt alloy (stellite), environmental and biological (CoU) monitoring was conducted for eight workers employed in gas-shielded arc (MAG) and oxy-acetylene welding processes. During oxy-acetylene braze-welding, the exposure to cobalt is very low as are urinary cobalt concentrations. On the other hand, during the MAG welding process, the exposure levels can exceed the TLV-TWA levels and correlated well with CoU at the end of a working shift. Two MAG welders followed for two consecutive weeks, showed different patterns of urinary cobalt excretion: under the same environmental conditions, the higher CoU was found in the worker with greater past exposure. This aspect needs further evaluation before adopting CoU as a current indicator of occupational exposure to the metal.


Jan 1, 1985·International Archives of Occupational and Environmental Health·Y IchikawaS Goto
Jan 1, 1985·International Archives of Occupational and Environmental Health·G ScansettiF Fantoni

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Jun 1, 2006·International Archives of Occupational and Environmental Health·Fumiko OhashiMasayuki Ikeda
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