Chromium-Free
Primer for Threaded Fasteners
(Pratt & Whitney - United Technologies Corporation)
Project Number: J-95-MF-003
Completed in 1999
Joint Test Protocol The JTP
documents the critical technical and performance requirements for qualifying
potential alternatives and the necessary laboratory and field operational
validation testing. Four potential alternatives, Alumazite ZDA, TT-P-645B
Zinc Molybdate Primer, TT-P-664D High Solids Primer, and ZRC Cold Galvanizing
Compound, were tested in accordance with the JTP. Test results are documented
in a JTR.
Based on the results of this testing, TT-P-664D High Solids Primer and
TT-P-645B Zinc-Molybdate Primer are both acceptable alternatives to zinc
chromate primer, with TT-P-664D being preferred, for providing galvanic
corrosion protection for inserts and fasteners used in aircraft engines
manufactured by P&W-UTC.
To view the JTP for Validation of Alternatives to Zinc Chromate Primer for Galvanic Corrosion Protection for Inserts and Fasteners in Aircraft Engines, dated June 20, 1996, revised May 11, 1998 please click here.
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Project Matrix
and Points of Contact
Meeting and Teleconference Summaries Joint Test Protocol |