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Particulate and gaseous emissions when welding aluminum alloys
Homer Cole1, Seymour Epstein, Jon Peace
1Alcoa Inc., Pittsburgh, PA 15212-5858, USA.
Journal of Occupational and Environmental Hygiene
|July 11, 2007
Summary
Electric arc welding of aluminum alloys generates hazardous emissions. Emission levels depend on welding process, alloy composition, and welder position, informing employer hazard control strategies.
Area of Science:
- Metallurgical Engineering
- Occupational Health and Safety
- Environmental Science
Background:
- Aluminum fabrication and repair frequently utilize electric arc welding.
- Welding processes generate ultraviolet radiation, metallic oxides, fumes, and gases.
- Aluminum alloys, used for enhanced properties, influence emission composition.
Purpose of the Study:
- To quantify emissions from aluminum arc welding.
- To characterize emissions from gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW).
- To assess the impact of various aluminum alloys on emission profiles.
Main Methods:
- Conducted welding emission tests in a simulated production environment without forced ventilation.
- Utilized GMAW and GTAW processes with diverse base and filler aluminum alloys.
- Measured concentrations of various analytes emitted during welding operations.
Main Results:
- Welding process significantly impacts emission concentrations.
- Aluminum alloy composition is a key determinant of emission characteristics.
- Welder position and welding helmet influenced analyte exposure levels.
Conclusions:
- Identified key factors influencing welder exposure to arc welding emissions.
- Provided data for employers to manage hazards associated with aluminum alloy welding.
- Established a foundation for hazard communication regarding aluminum welding emissions.
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