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  1. Maintenance of stellite and tungsten carbide saw tips : respiratory health and exposure-response evaluations.

    Article - En anglais


    To study exposure to cobalt and chromium in saw maintenance rooms and test respiratory health among saw filers at lumber mills.

    Hard-metal lung disease is associated with cobalt in the manufacture of tungsten carbide tools ; recently it has also been reported among tool maintenance workers.

    Lumber mills often use saws tipped with tungsten carbide or with a newer alloy, stellite (containing more cobalt, as well as chromium).

    Methods-A cross sectional study of 118 saw filers at eight lumber mills was carried out that included a standardised questionnaire, spirometry, personal air sampling, and examination of tasks every 10 minutes (by observation).

    Comparison data were from a study ofbus mechanics tested with similar methods.

    Results and Conclusion-Cobalt exposure was associated with tungsten carbide grinding but not with stellite grinding.

    Chromium exposure was associated mainly with stellite welding.

    Saw filers had a twofold increase in phlegm and wheeze (P<0.01) and a threefold increase in cough, phlegm, and wheeze related to work (P<0.001), but no increase in breathlessness.

    Mots-clés Pascal : Tungstène carbure, Scierie, Exposition professionnelle, Homme, Toxicité, Cobalt, Métal fritté, Poumon, Médecine travail, Appareil respiratoire pathologie

    Mots-clés Pascal anglais : Tungsten carbide, Saw mill, Occupational exposure, Human, Toxicity, Cobalt, Sintered metal, Lung, Occupational medicine, Respiratory disease

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 95-0201441

    Code Inist : 002B03L05. Création : 09/06/1995.