IPAL IP1041 / CFIPAL slurry diffusion aluminide coatings for the hot section of gas turbine engines (up to 1000 °C)

Technical specifications

Specifications are taken from the manufacturer’s technical documentation. Updated 11/10/2026.

Description

After application and heat treatment in an oven a diffusion layer of aluminum intermetallics with the base metal, nickel or cobalt alloys, is formed, and a protective film of aluminum oxide grows on it during operation. This is how turbine blades and nozzle guide vanes, flame tubes and combustion chamber parts are protected against high-temperature oxidation and corrosion. The slurry method gives aluminizing without the complex equipment of vapor-phase deposition. The IP1041 is designed for temperatures up to 1000 °C, and the CFIPAL was created as part of a program to eliminate hexavalent chromium compounds. The group also includes auxiliary materials. The IP2902TM is a high-temperature ceramic binder. The PL268 is an alumina core paint, applied by brush in a thin layer against "channeling" in directionally solidified castings, its base contains alumina particles of about 5 µm, and for spraying there is the additive PL268-AID in a ratio of 5 parts to 15 parts of paint. The PL248 and PL246 are acrylic binders for brazing powders in furnace brazing per RPS 194, and they burn out cleanly and leave almost no residue.

How to choose

The choice depends on temperature and chemistry. The IP1041 is taken for hot-section parts of gas turbines up to 1000 °C, and the CFIPAL when a chromium-free two-component version is needed. For making cores in casting the PL268 is used, for furnace brazing the PL248 or PL246, and for high-temperature bonding the IP2902TM. The temperature, atmosphere, time and thickness of the diffusion treatment are set by the customer's process.