Contours of Air Pollutant Concentrations and Corrosion Rates of Low Carbon Steel-Toyosaka City.
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概要
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Each of local self-governing bodies has accumulated data of air pollutants. We have tried to make the concentration contours for the pollutants in Niigata city and Kubiki village using the data.<BR>In this paper, we report the contours of chloride ion, sulfate ion, sulfur oxides and nitrogen oxides as air pollutants in Toyosaka city. To express the contours, the equation of smoke diffusion was utilized. The concentrations of nitrogen oxides and sulfur oxides were almost constant all the year round, while those of cloride and sulfate ions decreased in summer season. Probably, the difference depend on the location of the city, since the city is located near Niigata city and Niigata East Harbor (Industrial area) .<BR>The specimens of low carbon steel were spread out in the city and the contours of corrosion rates were also drawn. The expected values of corrosion rates were calculated by a multiple regression analysis with chloride and sulfate ions. The values agreed well with the observed values in winter season.
- 日本環境化学会の論文
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