Pitting of steel in chloride solutions was studied in an experimental cell that permitted measurement of the pH and potential at active and passive areas as well as the current flowing between the areas. The potentials could be controlled potentiostatically. When the potentials of the active and passive areas were held at the same value, the corrosion rate at the active area was decreased by a factor of about 10, compared with the freely corroding rate. The kinetics of the processes in the active area were found to change rapidly with small variations of potential.

Subject
Pits, Cathodic polarization, Steel surfaces, Cylinders, Corrosion rate, Cathodic potential, Sodium chloride, Corrosion reactions, Sodium chloride solution, Steel, Protection potential, Electrodes, Electrode potential
© 1971 National Association of Corrosion Engineers
1971
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