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96172 HIGH TEMPERATURE EROSION OF OXIDE SCALE FORMED ON T2 AND 310HcbN STEELS IN A SIMULATED PFBC CORROSION ENVIRONMENT

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Product Number: 51300-96172-SG
ISBN: 96172 1996 CP
Author: T. Hayashida, S. Miyazaki, Y. Imaizumi, K.Ogawa, S.Tokura, N. Otsuka
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High temperature erosion of prcoxidized T2 and 310HCbN steels was studied by evaluating the critical erodent velocity (Vc) necessary to damagehemovc the oxide scale formed on T2 and 310HCbN steels in a simulated PFBC corrosion environment. The Vc value of Fe2O3/Fe3O4 scale formed on T2 steel decreased as the erosion temperature increased, indicating that the erosion resistance of oxide scale on T2 steel tends to lower at above 400°C. However, the Vc value of Cr2O3 scale formed on 310HCbN steel was relatively independent of the erosion temperature, suggesting that the Cr2O3 scale on 310HCbN steel is much more “stable” and somewhat temperature-independent to the erosion attack. Above 600°C, Cr2O3 scale was more protective than the Fe2O3/Fe3O4 scale. The effects of erosion temperature on Vc’s of the oxide scales were compared and discussed with their Vickers hardness measured at high temperatures. Keywords: high temperature corrosion, erosion-corrosion, PFBC boiler, oxide scale, boiler tube, Vickers hardness
High temperature erosion of prcoxidized T2 and 310HCbN steels was studied by evaluating the critical erodent velocity (Vc) necessary to damagehemovc the oxide scale formed on T2 and 310HCbN steels in a simulated PFBC corrosion environment. The Vc value of Fe2O3/Fe3O4 scale formed on T2 steel decreased as the erosion temperature increased, indicating that the erosion resistance of oxide scale on T2 steel tends to lower at above 400°C. However, the Vc value of Cr2O3 scale formed on 310HCbN steel was relatively independent of the erosion temperature, suggesting that the Cr2O3 scale on 310HCbN steel is much more “stable” and somewhat temperature-independent to the erosion attack. Above 600°C, Cr2O3 scale was more protective than the Fe2O3/Fe3O4 scale. The effects of erosion temperature on Vc’s of the oxide scales were compared and discussed with their Vickers hardness measured at high temperatures. Keywords: high temperature corrosion, erosion-corrosion, PFBC boiler, oxide scale, boiler tube, Vickers hardness
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