This article covers the basic regularities of marine corrosion at the waterline and its relationship with the immersion potential (Billiter potential). It offers a model of an electrochemical metal fracture at the interface, which allows to explain the experimentally observed type of corrosion curve. We focus our attention in this model on the influence of the electric double-layer capacitance on the corrosion rate in the waterline spray zone. Within the framework of the adopted concept, the capacitance change at the interface results in a corresponding capacitive (anode) electrical current that causes dissolution when the metal surface is wetted. This phenomenon is associated with some protection (cathode) current on the already wetted surface of the metal.
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