Characterization of airborne particles generated from metal active gas welding process.

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.

journal_name

Inhal Toxicol

journal_title

Inhalation toxicology

authors

Guerreiro C,Gomes JF,Carvalho P,Santos TJ,Miranda RM,Albuquerque P

doi

10.3109/08958378.2014.897400

subject

Has Abstract

pub_date

2014-05-01 00:00:00

pages

345-52

issue

6

eissn

0895-8378

issn

1091-7691

journal_volume

26

pub_type

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