Characterization of Reaction Products from Field Exposed Tubes Free

In order to assist in developing mechanistic and computational models for understanding the performance of current Fe-base waterwall tubing, characterization has been performed on three field-exposed low alloy steel waterwall tubes. The waterside oxide thickness was characterized using standard metallographic techniques. Alloy and oxide chemical composition was characterized using electron microprobe analysis. Waterside scale thickness was measured as a function of location. Agreement between the measured and predicted values based on likely rate constants was poor.