Abstract
The localized acidification mechanism for stable pitting growth was the result of pitting research performed by many investigators, led by Galvele. The main point of the mechanism is that a localized pH drop on the anode surface is a necessary condition to sustain pitting. The analysis of the transport processes taking place inside a pit, taking into account the hydrolysis of the metal ions, allowed the explanation of the pitting potential significance and gave a quantitative explanation of the influence of solution pH, reducible ions, inhibitors, and aggressive ion concentration on the pitting potential. In the present work, a brief description of the mechanism development and examples of the pitting and crevice systems that have confirmed its validity are presented. Potential future lines of work are also briefly suggested.
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