Abstract
The pitting corrosion of stainless steel in neutral chloride media at 70°C was prevented by applying cathodic current in its passive region. The protective potential range of -0.6- -0.4V, vs. SCE and its required cathodic current density of 8μA/cm2 were determined by measurements on polarization and potentiostatic dissolution current change in long period.
This method was applied to a chemical plant and successful in preventing its pitting.
