Characterization of airborne particles generated from metal active gas welding process

01/01/2014

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.

Autores da comunidade :

• 

  J

  João Fernando Pereira Gomes

  ist123818

  Afiliações e fontes

  IST > iBB

  Instituto de Bioengenharia e Biociências

  IST > CEBQ

  Centro de Engenharia Biológica e Química

  De: orcid

  ID: 33118748

  De: scopus

  ID: 2-s2.0-84918805873

  De: cienciavitae

  ID: 62387

• 

  P

  Paula Cristina Silva Albuquerque

  ist429802

  Afiliações e fontes

  IST > CERENA

  Centro de Recursos Naturais e Ambiente

  De: cienciavitae

  ID: 2250551

AO - Versão original do autor

INHALATION TOXICOLOGY

345

352

26

6

0895-8378

10.3109/08958378.2014.897400

chemical-engineering - Engenharia Química

eng - Inglês

http://hdl.handle.net/10400.21/3673