This paper will present evidence indicating that the root cause of cathodic disbondment of protective organic coatings is the displacement of the coating by a high pH aqueous film between the coating and the substrate. This is based upon experiments involving delamination caused by soaking in ammonium hydroxide solution and experiments involving cathodic delamination in a noncorrosive medium at low applied potential.
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E. L. Koehler (1984) studied this question.
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