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Design, construction, and characterization of a novel robotic welding fume generator and inhalation exposure system for laboratory animals.
J Occup Environ Hyg. 2006 Apr; 3(4):194-203; quiz D45.JO

Abstract

Respiratory effects observed in welders have included lung function changes, metal fume fever, bronchitis, and a possible increase in the incidence of lung cancer. Many questions remain unanswered regarding the causality and possible underlying mechanisms associated with the potential toxic effects of welding fume inhalation. The objective of the present study was to construct a completely automated, computer-controlled welding fume generation and inhalation exposure system to simulate real workplace exposures. The system comprised a programmable six-axis robotic welding arm, a water-cooled arc welding torch, and a wire feeder that supplied the wire to the torch at a programmed rate. For the initial studies, gas metal arc welding was performed using a stainless steel electrode. A flexible trunk was attached to the robotic arm of the welder and was used to collect and transport fume from the vicinity of the arc to the animal exposure chamber. Undiluted fume concentrations consistently ranged from 90-150 mg/m(3) in the animal chamber during welding. Temperature and humidity remained constant in the chamber during the welding operation. The welding particles were composed of (from highest to lowest concentration) iron, chromium, manganese, and nickel as measured by inductively coupled plasma atomic emission spectroscopy. Size distribution analysis indicated the mass median aerodynamic diameter of the generated particles to be approximately 0.24 microm with a geometric standard deviation (sigma(g)) of 1.39. As determined by transmission and scanning electron microscopy, the generated aerosols were mostly arranged as chain-like agglomerates of primary particles. Characterization of the laboratory-generated welding aerosol has indicated that particle morphology, size, and chemical composition are comparable to stainless steel welding fume generated in other studies. With the development of this novel system, it will be possible to establish an animal model using controlled welding exposures from automated gas metal arc and flux-cored arc welding processes to investigate how welding fumes affect health.

Authors+Show Affiliations

Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, USA. jga6@cdc.govNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

16531292

Citation

Antonini, James M., et al. "Design, Construction, and Characterization of a Novel Robotic Welding Fume Generator and Inhalation Exposure System for Laboratory Animals." Journal of Occupational and Environmental Hygiene, vol. 3, no. 4, 2006, pp. 194-203; quiz D45.
Antonini JM, Afshari AA, Stone S, et al. Design, construction, and characterization of a novel robotic welding fume generator and inhalation exposure system for laboratory animals. J Occup Environ Hyg. 2006;3(4):194-203; quiz D45.
Antonini, J. M., Afshari, A. A., Stone, S., Chen, B., Schwegler-Berry, D., Fletcher, W. G., Goldsmith, W. T., Vandestouwe, K. H., McKinney, W., Castranova, V., & Frazer, D. G. (2006). Design, construction, and characterization of a novel robotic welding fume generator and inhalation exposure system for laboratory animals. Journal of Occupational and Environmental Hygiene, 3(4), 194-203; quiz D45.
Antonini JM, et al. Design, Construction, and Characterization of a Novel Robotic Welding Fume Generator and Inhalation Exposure System for Laboratory Animals. J Occup Environ Hyg. 2006;3(4):194-203; quiz D45. PubMed PMID: 16531292.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Design, construction, and characterization of a novel robotic welding fume generator and inhalation exposure system for laboratory animals. AU - Antonini,James M, AU - Afshari,Aliakbar A, AU - Stone,Sam, AU - Chen,Bean, AU - Schwegler-Berry,Diane, AU - Fletcher,W Gary, AU - Goldsmith,W Travis, AU - Vandestouwe,Kurt H, AU - McKinney,Walter, AU - Castranova,Vincent, AU - Frazer,David G, PY - 2006/3/15/pubmed PY - 2006/5/10/medline PY - 2006/3/15/entrez SP - 194-203; quiz D45 JF - Journal of occupational and environmental hygiene JO - J Occup Environ Hyg VL - 3 IS - 4 N2 - Respiratory effects observed in welders have included lung function changes, metal fume fever, bronchitis, and a possible increase in the incidence of lung cancer. Many questions remain unanswered regarding the causality and possible underlying mechanisms associated with the potential toxic effects of welding fume inhalation. The objective of the present study was to construct a completely automated, computer-controlled welding fume generation and inhalation exposure system to simulate real workplace exposures. The system comprised a programmable six-axis robotic welding arm, a water-cooled arc welding torch, and a wire feeder that supplied the wire to the torch at a programmed rate. For the initial studies, gas metal arc welding was performed using a stainless steel electrode. A flexible trunk was attached to the robotic arm of the welder and was used to collect and transport fume from the vicinity of the arc to the animal exposure chamber. Undiluted fume concentrations consistently ranged from 90-150 mg/m(3) in the animal chamber during welding. Temperature and humidity remained constant in the chamber during the welding operation. The welding particles were composed of (from highest to lowest concentration) iron, chromium, manganese, and nickel as measured by inductively coupled plasma atomic emission spectroscopy. Size distribution analysis indicated the mass median aerodynamic diameter of the generated particles to be approximately 0.24 microm with a geometric standard deviation (sigma(g)) of 1.39. As determined by transmission and scanning electron microscopy, the generated aerosols were mostly arranged as chain-like agglomerates of primary particles. Characterization of the laboratory-generated welding aerosol has indicated that particle morphology, size, and chemical composition are comparable to stainless steel welding fume generated in other studies. With the development of this novel system, it will be possible to establish an animal model using controlled welding exposures from automated gas metal arc and flux-cored arc welding processes to investigate how welding fumes affect health. SN - 1545-9624 UR - https://www.unboundmedicine.com/medline/citation/16531292/Design_construction_and_characterization_of_a_novel_robotic_welding_fume_generator_and_inhalation_exposure_system_for_laboratory_animals_ DB - PRIME DP - Unbound Medicine ER -