The Initial Stage of Metal Dusting Corrosion of Inconel 601 - Effects of Exposure Conditions and Near-Surface Structure and Composition

摘要

Fe, Ni and Co are known as catalysts for carbon formation. They are also main constituent elements of industrial alloys due to e.g. temperature properties. Alloys based on these metals are therefore susceptible to metal dusting corrosion; a catastrophic degradation phenomenon that proceeds by a gradual breakdown of the material into a powdery mixture of graphite, carbide and metal particles. It constitutes a major issue in the synthesis gas production, where (heat exchange) surfaces are extensively exposed to carbon-saturated gaseous environments with low partial pressures of oxygen and/or steam in a critical temperature range of 400-900 °C [1].