THE EFFECT OF YTTRIUM CHROMITE DOPING ON ITS RESISTANCE TO HIGH-TEMPERATURE SALT AND GAS CORROSIONS

The effect of doping of yttrium chromite by Group II-IV metal oxides o n its corrosion resistance in air at 1300 degrees C for 5 h and in sod ium sulfate and sodium chloride melts at 900 degrees C for 20 h was in vestigated. The corrosion resistance was found to improve substantiall y (by 3-7 times) under combined doping by zirconia and magnesia in amo unts close to their solubility limit in the chromite, and by alumina. Doping by calcium oxide and strontia in the same amounts produces a ne gligible effect, and a higher content of these oxides reduces the corr osion resistance in the aforementioned media by several tens of times.