indestructible advanced coatings

Attrition Coatings

IP Code No -

OMAT No - 863 (NML40)

A range of attrition coatings, designed by Rolls Royce and manufactured by Indestructible Paint Company comprising briefly of:

NML 40 - A 2 part cold cure system used in the field for the repair of NML 46 on interior engine compressor components. NML 40 has a relatively short shelf life of 6 weeks at room temperature but this can be extended be freezing.

NML 46 - A factory production product not really suited to field application because it is normally stored in a frozen state. Widely used on all sizes of turbine engine as a wear away coating. Usually applied as a thick film on the inside of engine rings against which the stator blades run. When a major overhaul is required the material can be stripped off and replaced negating the need to replace a costly ring. NML 46 is used with primer NML 52.
For more detail on how to use NML46 Single Pack Thick Film Attrition Coating.

NML 58 - A extended shelf life version of NML 40 for field and overseas use. A shelf life of 1 year is offered when stored at or below 20°C. NML 58 More Details.

EPWA 27 - Also known as PX/HX 443D. A graphite filled two part attrition compound which has almost totally replaced an earlier multi-coat spray system. Uses include the engine rings of the AV-8B Harrier. Hardness 75 shore D - ASTMD 2240. Ask for RPS 340/1 for application.

690-155-010 Probably one of the original attrition coatings, which is sprayed as a multi coat system. It is still used in Japan and this material has over 40 years constant use. Apply for a separate data sheet (CAT1/690-155-010). Ask for RPS 340 for application. Complies with DTD 900-4743 and AFS 609.

690-155-010 SPRAYING MULTI-COAT ATTRITION COATING Single pack, spraying multi coat abradeable coating resistant to heat, oils and fuels used on engine compressor components.
Approvals DTD 900/4743 RPS 340 AFS 609

General Comment - All of the above can be machined, and when damaged are easier to repair than an engine ring, making the on the ground time for the engine considerably less. Process specifications are too detailed to include here, further information is available from our Technical department.