time between alodine and primer

[maya04]

how long can I wait from application of alodine to application of mil-prf-23377.
I read somewhere that if more than 72 hours elapse I need to reprocess the part. can someone shed some light onthis issue

 

[CoryPad]

I didn't see anything about this in MIL-PRF-23377 or MIL-C-5541 or on the Technical Data Sheet for Alodine 600 or 1600. You can review the MIL documents here:

http://assist.daps.dla.mil/quicksearch/

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[CorBlimeyLimey]

Unless the parts are stored in a "contaminated" environment I doubt there is a limit.

Maybe just a rinse or wipe with acetone wouldn't hurt though. To "re-process" the part would mean stripping the old alodine off and re-etching. Once dried, the converted (alodined) surface will not receive more alodine.