Welding fume reduction by nano-alumina coating on electrodes – towards green welding process

Sustainability in manufacturing processes: practices performed in metal forming, casting, heat treatment, welding and electrostatic painting

“…Practices References Application of protective measures to reduce the impact on operator health (Antonini 2003) Implementation of methodologies that seek the analysis of environmental impacts (Seliger 2007;Mittal and Sangwan 2014;Chang et al 2015) Use of automated processes for welding (Seliger 2007;Mittal and Sangwan 2014;Liu et al 2014) Use of welding wires that reduce the rate of smoke generation (coated with nano-alumina or similar technology) (Sivapirakasam et al 2015) Critical analysis regarding the possibilities of replacing the current welding process with another one with better sustainable performance (Gialos et al 2018) Control and minimization of energy consumption in the welding process (Sharma et al 2015) In Table 4, the first practice listed is related to employees. There are researches…”

“…Gas reduction in the welding process is a practice that has contributed to the operator's health and to minimizing environmental impacts (Sivapirakasam et al 2015) cite a new method for reducing welding fumes at source. This method involves immersing a solder wire prior to its flow coating into a solution containing aluminum isopropoxide to obtain a thin film, that reduce the smoke concentration by up to 62%, contributing to environment aspects.…”

Control of exposure to hexavalent chromium concentration in shielded metal arc welding fumes by nano-coating of electrodes

“…In the sol-gel method, the properties of a nano-alumina film depend on several process parameters such as: molar concentration of the sol, dipping time, and sintering temperature [10] while, the properties of a nano-titania film depends on the poly ethylene glycol (PEG) content too [9]. PEG act as a binder for the TiO 2 film [12].…”

“…Reports indicated that the properties of a conventional electrode could be improved with the help of nanotechnology [7,8]. Recently, the authors coated the core mild steel welding wires with nano-titania and nano-alumina and achieved a significant reduction in fumes [9,10]. The fume concentration was found to vary with the crystallite size of the deposit.…”

Effect of substituting fine rutile of the flux with nano TiO2 on the improvement of mass transfer efficiency and the reduction of welding fumes in the stainless steel SMAW electrode

“…[28][29][30][31][32][33][34][35]. Therefore, the consumable modification process was considered to be at the best possible strategy towards reduction of hazardous constituent emissions at source [5,[36][37][38][39]. In the present investigation, the fine rutile powder in the electrode flux was substituted by nano TiO 2 at various weight percentages and subsequently its effect on the Fume Formation Rate (FFR) and Cr (VI) concentration in the welding fumes was experimentally investigated.…”