SermaLoy™ J diffused slurry
aluminide coating has a unique
silicon-enriched outer layer. It
is effective in protecting gas
turbine hot section components at
temperatures up to 1835°F (1000°C).
Advantages :
Excellent resistance to both
high- and low-temperature hot
corrosion (LTHC and HTHC)
- Excellent resistance to hightemperature
oxidation
- Excellent resistance to
particulate erosion
- Compatibility with most nickeland
cobalt-based superalloys,
as well as austenitic stainless
steels
- Flexibility of diffusion
processing that eliminates
the need for resolutioning/
precipitation/aging heat
treatments
Applications :
- Using a slurry greatly simplifies
masking and allows selective
coating of very localized regions –
which is ideal for restoration – or
alternatively, large areas like ducts
and burner cans.
The SermaLoy J slurry aluminide
can be formed between 1600°F
and 1835°F (870°C and 1000°C).
Diffusion cycles may be tailored
to each alloy and application.
Expensive resolutioning,
precipitation, and aging treatments
can be avoided by diffusing around
SermaLoy J slurry aluminide on WaspaLoy
(diffused at 1625°F (885°C) for 2 hours).
Backscatter electron image, 1000X.
1600°F (870°C). This relatively
low diffusion temperature not
only eliminates the microstructure
changes associated with hightemperature
aluminizing processes,
but also allows brazed components
to be refurbished without risking
damage to the brazed joints.
