Dynamic Oxidation and Corrosion in Power Generating Units

Abstract

The national energy program has focused attention on the desirability of converting plentiful resources of low-grade fossil fuels for power generation. Both in the process of fuel conversion and in the combustion of the converted fuel, the structural components of the manufacturing plant and the power generating equipment using the converted fuel will be subjected to severe attack by oxidation and corrosion. In many of the environments, materials surfaces will be exposed to temperatures, pressures, velocities, or compositions which vary significantly and rapidly with time. The oxidation and hot corrosion of the materials can exhibit a pronounced dependence on the local fluid dynamics in an industrial environment. Surface temperature fluctuations induced either from the unmixedness of the fluid streams or by dynamic variations of the fluid boundary layers are a source of cracking or spallation of protective oxide layers. In addition, the fluid dynamics can cause the deposition of non-equilibrium corrosive agents over a range of conditions far in excess of those expected from equilibrium considerations.

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Identifiers

DOI

10.5006/c1975-75166

Journal

CORROSION 1975

Year

1975