2. Corrosion mechanism

This section presents the different mechanisms of corrosion.

2.1 General

Iron is highly sensitive to an oxygenated active medium, and its surface becomes a zone of intense ionic exchange, between one pole ( $–$ ), the anode, and one pole ( $+$ ), the cathode. We then progressively observe the "consumption" of the anode according to the following reaction:

\begin{array}{l} Fe \to Fe^{++} + 2 e^{–} \\ 1 / 2 O_{2} + H_{2} O + 2 e^{–} \to 2 {OH}^{–} \end{array}

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Corrosion mechanism

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Bibliography

(1) - MAZUMDER (M.) - Global Impact of Corrosion : Occurrence, Cost and Mitigation. - Chemistry Department, King Fahd University of Petroleum & Minerals, Saudi Arabia (2020).
(2) - SÉNAT - Donner des armes à l'acier français : accompagner...

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