ПОКРИТИЯ ЗА ЗАЩИТА ОТ ВИСОКОТЕМПЕРАТУРНА КОРОЗИЯ НА ТУРБИННИТЕ ЛОПАТКИ НА ГТД
COATINGS FOR PROTECTION OF HIGH-TEMPERATURE CORROSION IN GTE TURBINE BLADES

Author(s): Ali Bukir
Subject(s): Geography, Regional studies
Published by: Сдружение „Академия за иновации и устойчивост“
Keywords: chemical corrosion; blades resource; flight; diffusion coatings; condensation coatings
Summary/Abstract: In modern gas turbine engines (GTE), the rotor blades of the turbine are made of heat-resistant nickel alloys. The properties of these alloys in combination with the construction solutions predetermine the permissible operating temperature of the gas before the turbine, on which depends the main engine performance: thrust, economy, resource, etc.However, heat-resistant nickel alloys do not provide sufficient resistance against the impact of the aggressive environment of the engine gas flow. In the case of chemical corrosion on the surface of the metals, different compounds are formed - oxides, sulphides, chlorides and others.For protection against high temperature gas corrosion of the blades in today's engine building use heat- and corrosion- resistant coatings, that are applied to the outer and inner surfaces of the cooled blades. The use of protective coatings enables a significant 3 to 5 fold increase in the blades’ resource.In the present study, attention is focused on two main types of coatings diffusion and condensation in order to clarify and evaluate their structural and technological capabilities for reliable protection of turbine blades.

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