Low alloy steels containing some chromium and other alloying elements with regular silicon content and the same chromium content steels containing extra silicon were tested at the velocities and temperatures which can occur in atmospheric fluidized bed combustors (AFBC's). It was determined that the particular characteristics of the scale formed on the alloys contributed to the metal wastage that occurred. The low chromium content steels which contained extra silicon (1.4 - 1.5 wt.%) had markedly lower metal loss than regular silicon content steels, even lower than that of higher chromium, regular silicon content steels. The role of the extra silicon that increases the erosion-corrosion resistance of the steels is under investigation.

Subject
Steel surfaces, Materials, Chromium, Protective scales, Thickness loss, Oxide scales, Surface analysis, Oxide surfaces, Silicon, Scale formation, Steel, Scale, Erosion corrosion
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1989
Association for Materials Protection and Performance (AMPP)
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