Influence of impurities contained in fuel and air on sulfide corrosion of turbine blades of the gas turbine engine

In the process of improving gas turbine engines (GTE), increasing resource and efficiency, there is a constant increase in temperature pressure working fluid. Turbine elements are subjected to high thermomechanical loads continuous exposure from aggressive environment. These impacts especially significant for blades first stages turbine, located area highest temperatures. One most serious types damage this case corrosive effect on blade combustion gases entering flow part turbine. The TS-1 fuel used an aircraft contains sulfur compounds its composition – elemental mercaptans, which process, together with sodium potassium air, leads material blade. To ensure long-term operation at inlet up 800...850 ℃, content these products both air limited according regulatory technical documentation. However, it not yet possible exclude them completely. presence GTE causes sulfide corrosion. Therefore, article considers influence impurities corrosion mechanism dissolution metal oxides or protective coating presented, as well diffusion oxide surface into depth. reason chloride contained nickel alloy applied has been established. vanadium rate given. order efficiency when exposed such environment, proposed use new formed aqueous suspension allowing introduction chromium coating, provides higher durability comparison serial aluminide coatings. ensured by exothermic reaction occurring during formation heat treatment.