The effect of yttrium and hafnium additions on high-temperature oxidation resistance of modified Fe-23Cr-5Al commercial, heat-resistant alloys was studied. The oxidation resistance was evaluated by the use of accelerated-life tests and isothermal oxidation for wires and flat samples, respectively. A sol-gel method of modification of the surface properties of ready-made heating elements was examined. The effect of several sol-gel coatings on the alloy, oxidation behavior in the accelerated-life test was studied.
