Abstract

Essential for the protection of high temperature alloys against corrosion is a dense, well adherent oxide layer. Interfacial phenomena in the nucleation, growth and adherence of such protective oxide scales are described and their mechanisms are discussed. Various positive effects are exerted by alloying with reactive elements, i.e. Ce, Y, La, Ti, Zr … in small concentrations, rather negative effects are caused by sulfur in the alloys, nitrogen and carbon may act favorably.

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