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Articles
  • OpenAccess
  • Respiratory Sensitization & Sickness from Welding/Burning Isocyanate Containing Paints  [PTT 2014]
  • DOI: 10.4236/gep.2014.24007   PP.44 - 48
  • Author(s)
  • Terrence Stobbe, Ryan Westra
  • ABSTRACT

  • The purpose of this paper is to make the environmental and occupational health community aware of a serious health risk associated with the common practice of burning industrial paint off of metal surfaces during or prior to welding. On four occasions bystanders and welder/burner personnel have experienced illness as a result of being exposed to the combustion products of isocyanate paints that were being burned off metal surfaces. In each case, the burning and the exposed people were outside in an open environment where the health risk was thought to be minimal due to the open environment with nominal wind movement through the work area. In one case, the person (a burner) developed permanent sensitization to phthalic anhydride as a result of the exposure. Phthalic anhydride was determined to be decomposition product of burned isocyanate paint. In the other three cases (which involved very short exposures), between two and six people became ill but did not develop sensitization. Their symptoms included dizziness, nausea, headache, and breathing difficulty the severity of which varied from very uncomfortable to temporarily incapacitating. This paper discusses the circumstances associated with each event, the approach used to determine that phthalic anhydride was a decomposition product, and some practical things that can be done to avoid having employees become victims of exposure.

  • KEYWORDS
  • Welding on Epoxy Paint, Burning Epoxy Paint, Welding Health Hazards, Burning Health Hazards
  • References
  • [1]
    ACGIH (2013). Threshold Limit Values for Chemical Substances & Physical Agents.
    [2]
    Henriks-Eckerman, M.-L., Engstr?m, B., & ?N?s, E. (1990). Thermal Degradation Products of Steel Protective Paints. American Industrial Hygiene Association Journal, 51, 241-244.
    http://dx.doi.org/10.1080/15298669091369592
    [3]
    Engstr?m, B., Henriks-Eckerman, M.-L., & ?n?s, E. (1990). Exposure to Paint Degradation Products When Welding, Flame Cutting, or Straightening Painted Steel. American Industrial Hygiene Association Journal, 51, 561-565.
    http://dx.doi.org/10.1080/15298669091370103
    [4]
    Isenstein, M., & Cook, L. (2002). Health Hazards from Burning a Chemical Agent Resistant Coating, a Polyurethane Paint. Poster Session Presented at the Annual American Industrial Hygiene Association (AIHCE) Conference No. 328.
    [5]
    Herpol, C. (1976). Biological Evaluation of the Toxicity of Products of Pyrolysis and Combustion of Materials Fire and Materials, 1, 29 to 35.
    [6]
    Levchik, S., & Weil, E. (2004). Review Thermal Decomposition, Combustion and Flame-Retardancy of Epoxy Resins—A Review of the Recent Literature. Polymer International, 53, 1901-1929.
    http://dx.doi.org/10.1002/pi.1473
    [7]
    OSHA 1910.1000 (2014) Permissible Exposure Limits for Air Contaminants, Subpart Z.

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