APV Engineered Coatings has developed masking procedures and compounds to prevent coating formation on portions of alloy/superalloy parts and assemblies during high-temperature diffusion coating/processing. The APV masking system is highly credited in the gas turbine engine industry and can be utilized in the operations of diffusion coating for new or overhauled aero/jet engines and industrial engines.
The M-1/M-5/M-7/M-8/M-10 masking system consists of dry powders, binders, and diluents. The slurry system components can be mixed at your location on an as-required basis, or purchased as ready-to-use slurries. Several of the maskants can also be used dry, with no binders. All components of the system are tested chemically and metallurgically after processing and all masking materials are tested under actual coating conditions.
High temperature coating masking materials are used primarily to prevent coating in selected areas during diffusion coating processes above 1500° F (815° C).
Low temperature coating masking materials are used primarily to prevent coating in selected areas during diffusion coating processes below 1500° F (815° C).
Developed for customer convenience, ready-to-use slurries are delivered pre-mixed to the appropriate consistency, weighed, and measured.
Maskant putty is a moldable material containing M-10 maskant and is used as an adjunct to masking dry and slurry maskants. Maskant tape is a flexible tape containing M-1 maskant and is used as an adjunct to slurry and/or dry masking processes for hard-to-reach areas.
Stripper is a blue crystalline compound used to remove aluminide coatings on nickel and cobalt super-alloys.