水中の鉄の酸化現象に及ぼす高磁界効果

概要

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A magnetic field perpendicular to the axis of an iron rod in water will cause the surface to the rod to badly corrode. The surface parallel to the magnetic field, however, will hardly corrode. The magnetic field is enhanced at the surface facing to the magnetic field. Therefor along the surface of the rod a magnetic field distribution arises. An enhanced magnetic field area will occur in front of the cylinder, while a weakened field area near the sides of the rod. Following the magnetic field distribution, the distribution of the dissolved oxygen concentration in water varies. The dissolved oxygen with weak magnetism concentrates at the enhanced field area, and attacks the surface of the iron rod. Corrosion is hardly observed at the both sides of the rod where the field is weakened. In order to study the performance of oxygen more precisely an experiment was conducted in which surface corrosion along the axis of the long iron rod placed in the magnetic field parallel to the axis of a solenoid magnet was observed. The solenoid magnet had a field distribution and the distribution of magnetic force along the axis of the rod. As a result, corrosion was observed at the part where the higher magnetic force existed on the iron rod and the corrosion in water migrated following the flow of oxygen in water.
湘南工科大学の論文
2001-03-18