Abstract Scope |
Corrosion is currently a significant problem within engineering. The corrosion of Ni superalloys in particular has been a large subject of study in recent years. The presence of SO2/3 within gas turbine engines, as a product of exhaust emissions, volcanic activity and the ingestion and high temperature oxidation of H2S is not yet understood. The production of SO2, its conversion to SO3 (with or without catalytic activity), the effect of moisture and/or salt on the materials within the turbine is known to be negative, but requires further investigation. Here, we show a novel gas exchange rig, that combines moisture and SO2/SO3 to replicate the service environment of a gas turbine engine. This is used in combination with salted specimens to perform fatigue tests at temperature in order to gain a more complete understanding of superalloy corrosion. |