Localized corrosion
Aqueous corrosion of metals and alloys

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Localized corrosion


Aqueous corrosion of metals and alloys

Authors : Jean-Louis CROLET, Gérard BÉRANGER

Publication date: June 10, 1998 | Lire en français

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3. Localized corrosion

Localized corrosion always results from uniform corrosion, due to galvanic coupling between heterogeneous zones. All it takes is a small anode and a large cathode to generate very high local penetration speeds. These local heterogeneities may be pre-existing, in the metal or in the corrosive medium, with a well-identified origin external to corrosion. They will then give rise to a large number of "derived" types of corrosion, i.e. interactions between corrosion and all these third-party phenomena. This will be discussed in 4

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