Corrosion Pattern of a Steel under a Magnetic Field and the Gradient Magnetic Field

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  • 磁場中における鉄の腐食模様と勾配磁場
  • ジバチュウ ニ オケル テツ ノ フショク モヨウ ト コウバイ ジバ

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Abstract

This paper reports our observations of concentrated heavy corrosion patterns of a steel cylinder, and the relationship between the corrosion pattern and a gradient magnetic field near the steel. A uniform static magnetic field up to 3 T was applied to the steel in our experiment. The steel was positioned in the center of a chamber filled with purified water, which in turn was placed in the center of the bore of a superconducting magnet. The steel itself produced a surrounding magnetic field, so that dissolved oxygen was attracted to the upper and the lower part of the steel by the magnetic force. As a result, these two parts were corroded badly, while lateral parts were not corroded. Our work suggests that the areas of corrosion of a steel can be specified by analysis of the spatial distribution of a magnetic field.

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