Abstract
A group of low chromium content tubing steels with additional amounts of silicon were erosion-corrosion tested in air at temperatures up to 850°C with angular-shaped erodent particles and fluidized bed combustor bed material. In previous tests using round-shaped erodent particles, these modified steels formed highly segmented scales which resulted in considerably lower erosion-corrosion metal wastage rates than occurred in typical silicon content low chromium steels. The same type of behavior occurred when angular-shaped particles were used but to a lesser extent. The angular-shaped particles resulted in thin scales that directly involved the substrate metal in the metal wastage process.
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