Comparative Study on Atmospheric Corrosion of Steel in Indoor and Outdoor Environments.
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概要
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Atmospheric corrosion rates of steel in indoor and outdoor environments have been studied for two decades at the sites in Tokyo Metropolis and Yamanashi Prefecture. In general, corrosion rates in indoor environments are much lower than outdoor and in mountaineous area, the differences between corrosion rates in indoor and outdoor environments are much larger than that of urban and industrial areas. These differences are explained that the corrosions in outdoor environments are caused mainly by acid precipitation and indoor corrosions are caused mainly by air pollution. Long-term accumulated corrosion rates in indoor environments have nearly constant corrosion rates for the all exposure periods. This phenomenon indicates that the growth of corrosion layer in indoor environment does not introduce to the formation of effective layer of protection from further corrosion of the metal . On the contraly, the corrosion layer in outdoor environment produces effective protecting layer against it's further corrosion. This fact is very important that the accumulated corrosion rate observed in indoor environments is almost equal to that in outdoor environment such as urban, industrial areas and suburbs near megalopolis. Because it is necessary to protect almost all indoor metal materials from the rapid corrosion rate in indoor environments.
- 社団法人 環境科学会の論文
社団法人 環境科学会 | 論文
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