塩化ナトリウム水溶液中の鉄板の腐食抑制に及ぼす磁場の影響

抄録

The corrosion of iron plate was inhibited in 0.01-20% sodium chloride aqueous solutions with magnetic field. The corrosion was inhibited with increasing of magnetic flux density. Magnetic field accelerated the dissolution rate and solubility of oxygen gas. Magnetic field had some accelerated the catholic reaction (O₂+4H⁺+4Fe²⁺→4Fe³⁺+2H₂O), however magnetic field had more inhibited the anodic reaction (Fe→Fe²⁺+2e^-). Reactions (Fe²⁺+8γ-FeOOH+ 2e^-→3Fe₃O₄+4H₂O and Fe²⁺+OH^-→FeOH⁺→Fe₃O₄) were activated with magnetic field. The white sediment on iron plate was changed to Fe₃O₄. A Fe₃O₄ was attracted by a magnetic force, and was deposited on surface. The corrosion was inhibited as the surface of iron was passivity. It was concluded that the attraction effect of Fe₃O₄ by a magnet and the increasing of formation rate of Fe₃O₄ were main effects with magnetic field in initial period.