Welding fumes reduction by coating of nano-TiO2 on electrodes

Mohan, Sreejith; Sivapirakasam, S.P.; Kumar, M.C. Santhosh; Surianarayanan, M.

doi:10.1016/j.jmatprotec.2014.12.020

Cited by 24 publications

(9 citation statements)

References 15 publications

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“…To the best of our knowledge, previous studies on coating of any nano material over the bare electrode wire for fume reduction was not found in the literature (except our own recent publication (S. Mohan et al, 2015). However, few references that appear in this field deals with the influence of addition of nano materials to the electrode on the arc stability and weld properties Fattahi et al, 2011).…”

Section: Tablementioning

confidence: 98%

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

Sivapirakasam

Mohan

Kumar

et al. 2015

Journal of Cleaner Production

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Section: Tablementioning

confidence: 98%

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

Sivapirakasam

Mohan

Kumar

et al. 2015

Journal of Cleaner Production

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“…[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.…”

Section: Introductionmentioning

confidence: 99%

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

Rajeswari

Paramashivan

Mohan³

et al. 2020

High Temperature Materials and Processes

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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 TiO 2. 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.

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“…Research has indicated that nanoparticle coating on the welding wire can bring considerable benefits compared to conventional welding wire [32]. For example, Mohan et al [33] showed that an electrode coated with TiO 2 particles reduced welding fumes and improved penetration depth as well as resulting in fine grain microstructure and better mechanical properties than with an uncoated commercial welding wire. The presence of nano-powders such as Al 2 O 3 , Ti, and W in welding electrodes has also been found to give beneficial results as regards weld formation and the mechanical properties of the joint [34,35].…”

Section: Introductionmentioning

confidence: 99%

High-strength steel S960QC welded with rare earth nanoparticle coated filler wire

Vimalraj

Kah

Layus

et al. 2018

Int J Adv Manuf Technol

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High-strength steel S960 is one of a number of advanced steels able to meet the demands of the shipbuilding, offshore, and construction industries for a favorable good high strength/weight ratio. Gas metal arc welding (GMAW) is commonly used in all structural steel fabrication, and developments in GMAW have removed previous limitations regarding high heat input and have reduced flaws. One solution for controlled heat input while ensuring a stable arc is alloying the welding wire. Usage of nanoparticles as an alloying element in welding wire have shown significant improvements in weld properties. This study investigates an S960QC joint welded with a welding wire having Lanthanum (La) nanoparticles as a coating and examines the influence of La on the welding parameters, arc stability, microstructure formation, and mechanical properties. The results are compared with a weld formed with conventional Union X96 welding wire. The microstructures observed in the weld region were martensite and tempered martensite for both wires. In the heat-affected zone, microstructures of upper bainite, martensite, tempered martensite, and globular bainite were found. The La nanoparticle-coated wire provided a stable arc during welding. However, due to the increase in wire thickness, manual wire feeding was required. The impact toughness was lower in the joint formed with the nanoparticle-coated wire. Additionally, the hardness at the fusion region was higher in the joint welded with the nanoparticle-coated wire.

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Welding fumes reduction by coating of nano-TiO2 on electrodes

Cited by 24 publications

References 15 publications

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

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

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

High-strength steel S960QC welded with rare earth nanoparticle coated filler wire

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