LABORATORY INVESTIGATIONS OF HIGH-TEMPERATURE CORROSION OF BOILER ALLOYS UNDER THE IMPACT OF ESTONIAN OIL-SHALE ASH

The aim of this paper is to estimate the corrosion resistance of two t ypes of U.S. boiler alloys, 1.25Cr-0.5Mo Sa-213 T11, 2.25Cr-1Mo Sa-213 T22 and one Russian pearlitic boiler alloy 12Cr1MoV under the influen ce of Estonian oil shale ash from circulating fluidized bed (CFB) expe rimental facility at University of British Columbia (UBC), Vancouver, Canada. The corrosion testing has been done on the laboratory apparatu s in Thermal Engineering Department of Tallinn Technical University in the presence of Estonian oil shale ash from UBC CFB test facility in the temperature interval from 500-580 degrees C lasting 500 hours. The results obtained can be used in the evaluation of high-temperature co rrosion intensity during the observed interval.