Pitting and crevice corrosion are sustained by accumulation of highly corrosive solutions in restricted regions (crevices and pits). Thus, electrochemical properties change appreciably when localized corrosion is established on an otherwise passive metal surface. Changes in corrosion potential and polarization resistance have been correlated with visual observations during crevice corrosion of Type 304 stainless steel. Thus, the initiation of localized corrosion can be detected remotely by electrochemical methods.
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Jones et al. (1969) studied this question.
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