Goller J W, Paik N W
Am Ind Hyg Assoc J. 1985 Feb;46(2):89-93. doi: 10.1080/15298668591394455.
A study was conducted to compare the iron oxide fume concentrations inside and outside the helmets of welders. Airborne iron oxide fume concentrations were determined simultaneously at four body locations--the left front shoulder, right front shoulder, front chest, and inside the helmet--during welders' normal activity. Results indicate that the fume concentrations at the actual breathing zone inside helmets are reduced to 36%-71% of concentrations outside the helmets, depending on the type of welding and employees' postures.
开展了一项研究，以比较焊工头盔内外的氧化铁烟雾浓度。在焊工正常作业期间，同时测定了四个身体部位（左前肩、右前肩、前胸和头盔内部）空气中的氧化铁烟雾浓度。结果表明，根据焊接类型和员工姿势，头盔内实际呼吸区域的烟雾浓度降低至头盔外浓度的36%-71%。
