Dennis J H, Mortazavi S B, French M J, Hewitt P J, Redding C R
Department of Environmental Science, University of Bradford, U.K.
Ann Occup Hyg. 1997 Jan;41(1):95-104. doi: 10.1016/S0003-4878(96)00023-3.
This paper describes the relationships between ultra-violet emission, ozone generation and CrVI production in MIG welding which were measured as a function of shield gas flow rate, welding voltage, electrode stick-out and shield gas composition using an automatic welding rig that permitted MIG welding under reproducible conditions. The experimental results are interpreted in terms of the physico-chemical processes occurring in the micro- and macro-environments of the arc as part of research into process modification to reduce occupational exposure to ozone and CrVI production rates in MIG welding. We believe the techniques described here, and in particular the use of what we have termed u.v.-ozone measurements, will prove useful in further study of ozone generation and CrVI formation and may be applied in the investigation of engineering control of occupational exposure in MIG and other welding process such as Manual Metal Arc (MMA) and Tungsten Inert Gas (TIG).
本文描述了在熔化极气体保护焊（MIG）中紫外线发射、臭氧生成与六价铬产生之间的关系，这些关系是通过一台自动焊接设备进行测量的，测量结果是保护气体流量、焊接电压、电极伸出长度和保护气体成分的函数，该自动焊接设备能在可重复的条件下进行MIG焊接。作为减少MIG焊接中职业性接触臭氧和六价铬产生率的工艺改进研究的一部分，实验结果依据电弧微观和宏观环境中发生的物理化学过程进行了解释。我们相信，这里所描述的技术，特别是我们所称的紫外线 - 臭氧测量技术的应用，将被证明对进一步研究臭氧生成和六价铬形成是有用的，并且可应用于研究MIG以及其他焊接工艺（如手工电弧焊（MMA）和钨极惰性气体保护焊（TIG））中职业接触的工程控制。
