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What is P16TF3 copper nickel - indium alloy?

Q. I JUST HAD A CUSTOMER CALL ME IN REGARDS TO P16TF3 COPPER NICKEL - INDIUM ALLOY - WE ARE A POWDER COATING JOB SHOP, I THINK THIS MAY BE A PLATING, BUT CUSTOMER FELT IS WAS A POWDER COATING. HE ONLY HAD A SMALL QUANTITY OF PARTS (10). CAN YOU HELP? - THANKS CAROL

CAROL A. HERRING
POWDER COATING - WICHITA, Kansas
2006

A. P16TF3 is a General Electric Aircraft Engines specification for a Thermal Spray Process. Largely superseded by the newer P16TF5 spec. The application method (Class A = Arc spray, B= HVOF) and GE-approved metal powder should also be specified. As GE has rigorous supplier qualification requirements, and FAA & DoD regulations may also apply, I suggest declining this job.

Plasma sprayed Cu-In-Ni coatings, with MoS2-based dry film lubrication, are used to prevent galling & wear of titanium in jet engines. The melting point of GE alloy H50 is above 2100 °F.

Ken Vlach [deceased]
- Goleta, California

Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.
2006

Q. Can anyone advise as to the best way of chemically stripping a Copper-Nickel-Indium coating like this....is electrolytic options available?

Nigel Gill, BSc MIMF MRSC
Aerospace. - Glasgow, Scotland
February 6, 2009

A. We apply Cu Ni In with a twin Wire arc on GE parts, to strip the coating, use 50% nitric acid and DI water.

George Kassaseya
Pacific Aerodynamic - Orange, California
March 15, 2017

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