Effect of treatment with tannic, gallic and phosphoric acids on the electrochemical behaviour of rusted steel

摘要

The present paper studies the effect of different treatments with tannic, gallic and phosphoric acids, which are applied on a rusted steel surface for stabilizing the rust layer before a paint coating is applied. Impedance, polarization resistance and chemical analysis data suggest that none of the applied treatments effectively block the activity in the rusted steel surface. © 1992.