[en] The dissolution amount of Zn plate was 0.058 mg/cm² in the non-magnetically treated solution, and was 0.059 mg/cm² in the magnetically treated solution after 24 hour of immersion. The magnetic treatment had no effect to corrosion of Zn plate as pH on surface was not recognized the difference. The addition of Zn(II) ion in the solution was prepared to the effects of corrosion and dissolution of Fe. The regularity was not obtained the effect of the magnetic treatment on the dissolution of Fe plate

[en] A 3% NaCl solution of 1 dm³ circulated with 1.5 dm³/min by a pump for 24 h in the presence of magnetic field. An iron plate immersed in a 100 cm³ of test solution for 24 h. The rest potential and pH on surface fixed after 3 h. Containing 0∼120 ppm of Fe(II) ion, the dissolution in the magnetically treated solution rose comparing with that in the non-magnetically treated solution. The dissolution amount reached to maximum at 50 ppm, then fixed in the non-magnetically treated solution. When Fe(II) ion existed in the magnetically treated solution, dissolution accelerated a little. In the non-magnetic treated solution containing 10∼125 ppm of Fe(III) ion existed, the dissolution accelerated. The dissolution amounts reached to maximum at 50 ppm, then decreased from maximum value. In the magnetically treated solution, the dissolution amounts reached to minimum until 50 ppm, then increased from minimum value. The dissolution amounts affected larger with increasing of magnetic flux density. Fe(II), Fe(III) ions and magnetic treatment affected to formation of Fe(OH)₂ and/or Fe₃O₄ films. The magnetically treated effects memorized about one month