1. Introducing the phenomenon

1.1 Dry corrosion, aqueous corrosion

Like all corrosion phenomena, dry corrosion involves the degradation of materials produced by human activity, leading to their return to a more chemically stable form. This degradation takes place in the absence of a liquid phase acting as an electrolyte. The absence of an electrolyte and the relative slowness of the resulting phenomena mean that this type of corrosion requires a high temperature to be active. This is why we often speak of "high temperature corrosion", "thermal oxidation" or "hot gas corrosion".

A fundamental difference arising from the absence of a liquid phase in dry corrosion is the relative importance of immunity and passivation. In aqueous environments, the absence of corrosion results from one of...