| Abstract Scope |
New corrosion-resistant coatings operating under high-temperature corrosion conditions were obtained using FA-charges. The coatings contain 15...25% aluminum and 18-23% chromium. Such aluminum content ensures the formation of an α-Al2O3 oxide film during oxidation. The second most important component of the coatings is chromium, which ensures the formation of a -Cr2O3 film. To obtain the coatings, a physicochemical model was developed, including thermodynamic modeling of the gas phase and a study of corrosion resistance at temperatures of 600-900 oC. The content of gaseous aluminum compounds in the reactor, using FA batches in the temperature range of 700–1500 K, are: AlH, AlH2, AlF, AlF2, AlF3, AlHF, AlH2F, AlI, AlI2, AlI3, Al2I6, gaseous chromium compounds: Cr, Cr, Cr, Cr, Cr CrF2, CrF3, Crl, Crl2, Crl3 etc., as well as the content of condensed products: Al(c), Al2O3(c), AlF3(c), AlI3(c), AlN(c), Cr(c). 0.45 – 0.8% C phases arise: (Cr,Fe)23C6(Cr,Fe)7C3. |