Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Content Variation of Total Chromium and Hexavalent Chromium in Flux Cored Arc Welding

플럭스 코어드 아크 용접 중 발생하는 총 크롬 및 6가 크롬의 함량 변화

  • Yoon, Chung Sik (Wonjin Institute for Occupational and Environmental Health) ;
  • Paik, Nam Won (School of Public Health, Seoul National University) ;
  • Kim, Jeong Han (Korea Institute of Industrial Technology) ;
  • Park, Dong Uk (Department of Environmental Health, Korea National Open University) ;
  • Ha, Kwon Chul (School of Public Health, Seoul National University) ;
  • Cho, Sang Jun (School of Public Health, Seoul National University) ;
  • Kim, Shin Bum (Wonjin Institute for Occupational and Environmental Health) ;
  • Chae, Hyun Byung (Korea Institute of Industrial Technology)
  • Received : 1999.08.16
  • Accepted : 2000.01.26
  • Published : 2000.05.10
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Abstract

The practice of welding stainless steel is known to produce various valance states of chromium. $CO_2$ flux cored arc welding on stainless was performed in fume collection chamber. Content of total chromium and hexavalent chromium in fumes, content of hexavalent chromium in total chromium, solubility of hexavalent chromium were investigated. Content of total chromium in fumes increases from 2~3% to 7~9% as a function of input energy, but hexavalent chromium, less than 1.2% in fumes, is not related to input energy. Hexavalent chromium in fumes exists as solubles up to 90%. Content of total chromium in flux cored arc welding fumes and solubility of hexavalent chromium are similar to shielded metal arc welding fumes, but content of hexavalent chromium is similar to metal inert gas welding fumes. These characteristics are relevant to flux of wires and $CO_2$ shielding gas.

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