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The present contribution aims at presenting some relevant developments in the characterisation of corrosion phenomena in the presence of two commonly employed coating types: organic coatings and inorganic (Portland cement) based coatings; the former acts as physical barriers to water access and aggressive ions to the metallics substrate. But only the cement-based coatings provide an additional chemical protection barrier due to the high pH, favouring steel passivation. Current strategies to improve the performance of these coatings consist of giving them self-healing characteristics, which extend their service life. Electrochemical techniques are significant in characterising healing and self-healing in both scenarios.
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Nóvoa et al. (2023) studied this question.
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