This paper presents a novel method for reducing fume formation rate (FFR) and hexavalent chromium (Cr(VI)) concentration in welding fumes by substituting fine rutile in the flux of SMAW electrode with nano TiO2. A maximum reduction of FFR up to 21% and Cr(VI) up to 42% was achieved in the experimental electrode. For the first time, the experimental study related the efficacy of mass transfer of specific elements to their percentage reduction in the emission. The results of the constituent analysis showed that Fe, Ni, Cr and Mn in the welding fumes were reduced up to 16%, 44%, 32% and 28% respectively due to the deoxidization property of the nano-Ti, which prevented the target elements to get oxidized.

中文翻译：

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纳米TiO2替代细金红石焊剂对提高不锈钢SMAW焊条传质效率和减少焊接烟尘的影响

本文提出了一种通过用纳米 TiO2 代替 SMAW 电极助焊剂中的细金红石来降低焊接烟尘中烟尘形成率 (FFR) 和六价铬 (Cr(VI)) 浓度的新方法。在实验电极中，FFR 最大降低了 21%，Cr(VI) 降低了 42%。该实验研究首次将特定元素的传质功效与其排放减少的百分比联系起来。成分分析结果表明，由于纳米钛的脱氧性能，焊接烟尘中的Fe、Ni、Cr和Mn分别降低了16%、44%、32%和28%，防止了靶材元素被氧化。