熔接衛生に関する研究 (その5) : 熔接粉塵の成分について

概要

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Coating materials of three kinds of electrodes (low hydrogen type, lime titania type, and iron powder high iron oxide type) and the dusts emitted during the welding process were examined with X-ray diffractometry, polarization microscopy and chemical analysis. The results were as follows. 1) K^+ions originating from potash water glass were found in the dusts from the low hydrogen type electrode. Its alkaline action seemed to cause irritations of the mucous membrane. A great portion of fluorine originating from fluorites was found as CaF_2 in the dusts from the low hydrogen type electrode. 2) Fine particles of quartz and talc were found in the dusts from either the lime titania type or the iron powder high iron oxide type electrode. 3) Iron oxide, mostly magnetite, occupied 30∼40% of the welding dusts. The authors should like to specify the welder's lung rather as a magnetite lung than an iron oxide pneumoconiosis.
社団法人日本産業衛生学会の論文
1967-10-20