Okuno T, Ojima J, Saito H
Hazard Evaluation and Epidemiology Research Group, National Institute of Occupational Safety and Health, Japan, Nagao 6-21-1, Tama-Ku, Kawasaki 214-8585, Japan.
Ann Occup Hyg. 2010 Apr;54(3):293-8. doi: 10.1093/annhyg/mep090. Epub 2009 Dec 15.
The objective was to quantify the blue-light hazard from CO(2) arc welding of mild steel.
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.
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.
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.
量化低碳钢二氧化碳弧焊的蓝光危害。
在120 - 480A的焊接电流下，测量了实心焊丝和药芯焊丝在低碳钢二氧化碳弧焊中的电弧光谱辐射亮度。根据美国政府工业卫生学家会议指南中的定义，从光谱辐射亮度计算出有效蓝光辐射亮度和最大可接受暴露持续时间。
有效蓝光辐射亮度范围为22.9至213.1Wcm(-2)sr(-1)。相应的最大可接受暴露持续时间仅为0.47 - 4.36秒，这意味着在没有眼部防护的情况下，每天暴露于焊接电弧的总时间不应超过此持续时间。
观看低碳钢二氧化碳弧焊的电弧非常危险。焊工及其助手在这些弧焊操作中应使用适当的眼部保护器。此外，在开始弧焊操作时，他们应避免直接暴露在光线下。
