The Paton Welding Journal, 2001, №03

2001 №03 (04)

2001 №03 (06)

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The Paton Welding Journal, 2001, #3, 23-26 pages

Chemical composition of aerosol gaseous constituent in a shielded-gas welding

O.G. Levchenko

E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
It was established that a carbon monoxide and nitrogen oxides are the main components of a gaseous constituent of the welding aerosol in mechanized solid wire welding in CO₂, in Ar + CO₂ and Ar + CO₂ + O₂ mixtures. The reduction in oxidizing ability of the shielding gas leads to the decrease in intensity of evolution of carbon monoxide and increase in nitrogen oxides. Introducing of oxygen to the shielding mixture composition reduces the evolution of the carbon monoxide at the expense of its oxidizing and increases the intensity of formation of the nitrogen oxides. The mechanisms of formation of gaseous components of the welding aerosol and relations between the intensity of their evolution and welding conditions are explained.
Keywords: mechanized welding, shielding gases, welding aerosol, toxic components, welding conditions

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Suggested Citation

O.G. Levchenko (2001) Chemical composition of aerosol gaseous constituent in a shielded-gas welding. The Paton Welding J., 03, 23-26.

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