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  • Title: Blue-light hazard from CO2 arc welding of mild steel.
    Author: Okuno T, Ojima J, Saito H.
    Journal: Ann Occup Hyg; 2010 Apr; 54(3):293-8. PubMed ID: 20008891.
    Abstract:
    OBJECTIVES: The objective was to quantify the blue-light hazard from CO(2) arc welding of mild steel. METHODS: The spectral radiance of arcs in CO(2) arc welding of mild steel was measured for solid and flux-cored wires at welding currents of 120-480 A. Effective blue-light radiance and the maximum acceptable exposure duration were calculated from the spectral radiance using their definitions in American Conference of Governmental Industrial Hygienists guidelines. RESULTS: The effective blue-light radiance ranged from 22.9 to 213.1 Wcm(-2)sr(-1). The corresponding maximum acceptable exposure duration was only 0.47-4.36 s, meaning that the total daily exposure to the welding arc without eye protection should not exceed this duration. CONCLUSIONS: It is very hazardous to view the arcs in CO(2) arc welding of mild steel. Welders and their helpers should use appropriate eye protectors in these arc-welding operations. Also, they should avoid direct light exposure when starting an arc-welding operation.
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