The Paton Welding Journal, 2015, №07



2015 №07 (03)

DOI of Article 10.15407/tpwj2015.07.04

2015 №07 (05)

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The Paton Welding Journal, 2015, #7, 22-25 pages
 

Thermodynamics of formation of chromium compounds in welding aerosols

O.G. Levchenko And O.N. Bezushko

E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
Thermodynamic investigations of probability of formation of toxic chromium compounds in the composition of aerosols formed during arc welding of high-alloy steels using coated electrodes were carried out. The probability of proceeding of chemical reactions, resulting in formation of toxic chromium compounds in welding aerosols, was determined. It is shown that in the zone of welding arc in the temperature range from 1100 to 3000 K, the formation of hexavalent chromium oxide is low probable. The calculations established that adding of titanium, silicon, manganese and aluminum into the composition of welding electrodes prevents formation of CrO3. 9 Ref., 1 Table, 3 Figures.
 
Keywords: welding aerosols, harmful substances, thermodynamics, probability, chemical reactions, hexavalent chromium
 
 
Received:                18.03.15
Published:               13.10.15
 
 
References

1. (1982) Researches on the origin and the characteristics of chromium in stainless steel welding fumes: IIW Doc. II-A-563-82.
2. Kokh, B.A. (1975) Principles of thermodynamics of welding thermal processes. Leningrad: Sudostroenie.
3. Rykalin, N.N. (1951) Calculations of thermal processes in welding. Moscow: Mashgiz.
4. Filippov, S.I. (1967) Theory of metallurgical processes. Moscow: Metallurgiya.
5. Devero, O.F. (1986) Problems of metallurgical thermodynamics. Moscow: Metallurgiya.
6. Bernadsky, I.I. (1978) Theory of metallurgical processes. Kiev: Vysshaya Shkola.
7. Yushchenko, K.A., Levchenko, O.G., Bulat, A.V. et al. (2007) Sanitary and hygienic characteristics of covered electrodes for welding high-alloy steels. The Paton Welding J., 12, 35-38.
8. Yushchenko, K.A., Bulat, A.V., Levchenko, O.G. et al. (2009) Effect of composition of base metal and electrode covering on hygienic properties of welding fumes. Ibid., 7, 44-48.
9. Pokhodnya, I.K., Gorpenyuk, V.N., Milichenko, S.S. et al. (1990) Metallurgy of arc welding: Processes in arc and melting of electrodes. Kiev: Naukova Dumka.

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Suggested Citation

O.G. Levchenko And O.N. Bezushko (2015) Thermodynamics of formation of chromium compounds in welding aerosols. The Paton Welding J., 07, 22-25.

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