Abstract
The combined erosion-corrosion behavior of a group of chromium-containing steels used in chemical process and energy production equipment was investigated. It was determined that erosion of oxide scale formed on the surface was the dominant surface degradation mechanism on all of the steels at all test conditions. A change in the scale loss mechanism occurred between the 5Cr and 9Cr steels with the higher chromium steels having a much lower metal loss rate than the 2.25Cr and 5Cr steels. The composition of the scales on the ferritic steels was not as important as their morphology in determining metal loss rates. The presence of Cr 2O 3 in the scales of the austenitic steels helped to reduce scale formation and removal, and the resultant metal wastage.
Published Version
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