Hot Corrosion

A form of accelerated oxidation produced by the chemical reaction between a metallic component and molten salts deposited on its surface. At elevated temperatures, sulfur from the fuel reacts with sodium chloride in the ingested air to form sodium sulfate. The sodium sulfate then deposits on the hot-section components, such as nozzle guide vanes and rotor blades, and leads to an accelerated oxidation, or sulfidation, attack.