Abstract
Anodic passivation of iron in H3PO4 solutions has been studied mainly from a view point of finding the effects of magnetic field.
In cases the H3PO4 concentration is high passivation occurs in two steps and the magnetic field has no effect upon its first stage, while no remarkable change is observable in the case of 2nd stage too.
With dilute solutions of H3PO4 only the γ-Fe2O3 type passivation occurs and the magnetic field affects the phenomena in a way which is typical of the γ-Fe2O3 type passivation.
