Influence of Shielding Gas and Wire Type on the Microparticles Size Generated during MAG Welding Process

Abstract:

Exposure of welders to welding fumes and microparticles produced during electric welding can be dangerous and may cause serious maladies. It is important to understand the formation mechanism of microparticles generated during welding process on the one hand and the methods to diminish the risk on the welder’s health on the other hand. Experimental research results related to the assessment of microparticles size, generated during MAG welding process, are presented and discussed in detail in this paper. Rutile flux-cored and low fume metal powder cored wires with 1.2 mm diameter in combination with CO₂ shielding gas or M21 gas mixture (Corgon 18) have been used in the investigations. The experimental tests were performed in a special enclosure, equipped with Glass Fiber Filters and a Philips vacuum, with the aim to capture the microparticles developed by the MAG welding process. The microparticles collected during the experimental program have been analysed and measured by electron microscopy method with (SEM/ESEM - EDAX) Quanta 200 microscope. The study showed that low fume metal powder cored wires determined the achievement of smaller microparticles in comparison with rutile flux-cored wires. Finally, several conclusions emerged from the findings of this study are synthetically presented.

• Periodical: Applied Mechanics and Materials (Volumes 809-810)
• Pages: 461-466
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.809-810.461
• Online since: November 2015
• Authors: Marius Corneliu Gheonea, Danut Mihailescu, Elena Scutelnicu*
• Keywords: CO₂ Shielding Gas, M21 Shielding Gas Mixture, MAG Welding, Microparticles Size

References

[1] K. R. Carpenter, B.J. Monaghan, J. Norrish, Analysis of fume formation rate and fume particle composition for Gas Metal Arc Welding (GMAW) of plain carbon steel using different shielding gas compositions, ISI Journal International. 49, 3 (2009).

DOI: 10.2355/isijinternational.49.416

[2] M. Pîrvulescu, Contributions regarding the impact of a welded structures producer on the environment, PhD Thesis, Politehnica, University of Bucharest, (2010).

[3] I. Pires, L. Quintino, R.M. Miranda, J. F. P. Gomes, Fume emissions during Gas Metal Arc Welding, Toxicological & Environmental Chemistry. 88, 3 (2006) 385-394.

DOI: 10.1080/02772240600720472

[4] G. Pohlmann, C. Holzinger, Comparative investigations in order to characterise ultrafine particles in fumes in the case of welding and allied processes, Welding and Cutting. 12, 2 (2013) 2-10.

[5] S. S. Leonard, B.T. Chen, S.G. Stone, D. Schwegler-Berry, A.J. Kenyon, D. Frazer, J.M. Antonini, Comparison of stainless and mild steel welding fumes in generation of reactive oxygen species, Particle and Fibre Toxicology. 7-32 (2010) 1-13.

DOI: 10.1186/1743-8977-7-32

[6] J. M. Antonini, A.A. Afshari, S.G. Stone, B. Chen, D. Schwegler-Berry, W.G. Fletcher, W.T. Goldsmith, K.H. Vandestouwe, W. McKinney, V. Castranova and D.G. Frazer, Design, construction, and characterization of a novel robotic welding fume generator and inhalation exposure system for laboratory animals, Journal of Occupational and Environmental Hygiene. 3, 4 (2006).

DOI: 10.1080/15459620600584352

[7] J. W. Sowards, A. J. Ramirez, J. C. Lippold, D. W. Dickinson, Characterization Procedure for the Analysis of Arc Welding Fume, Welding Journal. 87 (2008) 76s - 83s.

[8] M. J. Gonse, J. C. Lippold, D. W. Dickinson, J. W. Sowards, A. J. Ramirez, Characterization of Welding Fume Generated by High-Mn Consumables, Welding Journal. 89 (2010) 25s - 33s.

[9] N. T. Jenkins, T. W. Eagar, Chemical Analysis of Welding Fume Particles, Welding Journal. (2005) 87s - 93s.

[10] ** Fume and Gases, AGA - A Member of the Linde Group.

[11] ** Cristal™ F100 - F 206. A new generation of flux cored wires, Air Liquide Welding.

[12] ** Cristal™ F119 - F 208. A new generation of flux cored wires, Air Liquide Welding.

[13] M. C. Gheonea, Experimental research on the assessment of pollutants generated in the MAG Welding Process with standard and ecological flux-cored filler wires, The 2nd Scientific Report of PhD Programme, Dunarea de Jos, University of Galati, (2014).

[14] ** Users's guide, Aristo Lud 320 welding equipment, ESAB AB, Sweden.

[15] ** Users' guide, Railtrac FW 1000 welding tractor, ESAB AB, Sweden.