This study introduces a spark discharge system (SDS) as a way to simulate welding fumes. The SDS was developed using welding rods as electrodes with an optional coagulation chamber. The size, morphology, composition, and concentration of the fume produced and the concentration of ozone (O3) and nitrogen oxides (NOX) were characterized. The number median diameter (NMD) and total number concentration (TNC) of fresh fume particles were ranged 10–23 nm and 3.1×107 − 6×107 particles/cm3, respectively. For fresh fume particles, the total mass concentration (TMC) measured gravimetrically ranged 85–760 μg/m3. The size distribution was stable over a period of 12 h. The NMD and TNC of aged fume particles were ranged 81–154 nm and 1.5×106−2.7×106 particles/cm3, respectively. The composition of the aged fume particles was dominated by Fe and O with an estimated stoichiometry between that of Fe2O3 and Fe3O4. Concentrations of O3 and NOX were ranged 0.07–2.2 ppm and 1–20 ppm, respectively. These results indicate that the SDS is capable of producing stable fumes over a long-period that are similar to actual welding fumes. This system may be useful in toxicological studies and evaluation of instrumentation. Copyright 2014 American Association for Aerosol Research

中文翻译：

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火花放电系统模拟焊接烟雾的物理化学特性


本研究引入了火花放电系统 (SDS) 作为模拟焊接烟雾的方法。 SDS 是使用焊条作为电极以及可选的凝固室开发的。对产生的烟雾的大小、形态、成分和浓度以及臭氧 (O3) 和氮氧化物 (NOX) 的浓度进行了表征。新鲜烟气颗粒数中值直径（NMD）和总数浓度（TNC）分别为10-23 nm和3.1×107-6×107颗粒/cm3。对于新鲜烟雾颗粒，通过重量分析测得的总质量浓度 (TMC) 范围为 85–760 μg/m3。尺寸分布在 12 小时内保持稳定。老化烟尘颗粒的 NMD 和 TNC 范围分别为 81–154 nm 和 1.5×106−2.7×106 颗粒/cm3。老化烟气颗粒的成分主要是 Fe 和 O，估计化学计量介于 Fe2O3 和 Fe3O4 之间。 O3 和 NOX 的浓度范围分别为 0.07–2.2 ppm 和 1–20 ppm。这些结果表明，SDS 能够长期产生与实际焊接烟雾相似的稳定烟雾。该系统可用于毒理学研究和仪器评估。版权所有 2014 美国气溶胶研究协会