Advancements in Coating Technology for Aircraft Turbine Blades

OBT, a 25-year-old professional turbine part supplier, has made significant advances in aircraft turbine blade coating technology. Our TBCs, MCrAIY, CoAl, PtAl, Al-Phosphate Coatings and other coatings services are all customized to withstand harsh working conditions and have been used in mass production for critical parts.

PtAl Coatings for Aircraft External Surfaces

OBT's PtAl coating is commonly applied in mass production for aircraft turbine components external surfaces. It has stability over 1000°C, superior to conventional aluminide coatings in high-temperature oxidation resistance. It has excellent hot corrosion resistance in sulfur-bearing and salt spray environments, and good thermal fatigue resistance with high bonding strength to the substrate, avert spallation from thermal cycles. This coating has 2-3 times longer service life in extreme conditions, high uniformity by eliminating traditional CVD constraints through the alternate change of positive and negative pressures, higher efficiency through pulsed delivery of gas (minimizing gas waste and expense), and flexibility to complex-shape workpieces.

CoAl Coatings for Marine Engine Blades

Our CoAl coating is in high-volume production for internal and external surfaces of marine engine blades. It exhibits outstanding oxidation resistance as a barrier coating, is stable and protective at temperatures over 1000°C, and offers outstanding corrosion resistance—key in marine service or with fuels containing sulfur (where molten salt films induce very severe accelerated corrosion to hot-end components). Its excellent bonding also resists cyclic stress, slowing coating cracking and spallation.

Al-Si Coatings for Gas Turbine Blades

OBT's Al-Si coating is applied in mass production for surfaces of gas turbine blades, with some combinations with CoAl coatings (for internal surface) on marine engine blades. In comparison to conventional aluminide coatings, the Al-Si composite gradient layer has less oxidative notch damage, appropriate for military and civilian engines. We possess stable, controllable processes (dissolving foreign technological monopolies using self-developed powders for key engine models) and provide lower costs for effective oxidation/corrosion protection.

Al-Phosphate Inorganic Coatings for Gas Turbine Low-Temperature Components

We use Al-Phosphate inorganic coatings on the outer surfaces of some of the gas turbine components (for low-temperature applications). The coating possesses excellent corrosion resistance and substrate adhesion, is resistant to molten salt erosion (perfect for sulfur-bearing gas turbine applications), and can resist high-low temperature cycle effects. It will not be suitable for over 400-500°C service, similar to its low-temperature application.

OBT's sophisticated coating technologies meet various requirements of airplane, ship and gas turbine components, improving performance, prolonging service life and reducing costs. Through concentration on dependable, mass-produced answers, we further supply top-quality protective coatings for demanding industrial applications.