Characterization of airborne particles generated from metal active gas welding process

C. Guerreiro, J. F. Gomes, P. Carvalho, Telmo Jorge Gomes dos Santos, Rosa Maria Mendes Miranda, P. Albuquerque

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

This study is focused on the characterization of particles emitted in the metal active gas welding of carbon steel using mixture of Ar + CO2, and intends to analyze which are the main process parameters that influence the emission itself. It was found that the amount of emitted particles (measured by particle number and alveolar deposited surface area) are clearly dependent on the distance to the welding front and also on the main welding parameters, namely the current intensity and heat input in the welding process. The emission of airborne fine particles seems to increase with the current intensity as fume-formation rate does. When comparing the tested gas mixtures, higher emissions are observed for more oxidant mixtures, that is, mixtures with higher CO2 content, which result in higher arc stability. These mixtures originate higher concentrations of fine particles (as measured by number of particles by cm 3 of air) and higher values of alveolar deposited surface area of particles, thus resulting in a more severe worker's exposure.
Original languageEnglish
Pages (from-to)345-352
JournalInhalation Toxicology
Volume26
Issue number6
DOIs
Publication statusPublished - May 2014

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