Paints & Coatings Resource Center

Ask the Expert Question-and-Answer Archive

by Ron Joseph

January, 2010

CARC Adhesion Test Perf MIL-DTL-53072

Q. We have applied about 50 microns thick zinc-rich primer (A-A-59745) on steel
substrate as pretreatment before CARC application per MIL-DTL-53072.

MIL-DTL-53072 para. requires adhesion test per ASTM D3359 per method B regardless of the thickness of the paint system although the test standard ASTM D3359 requires test per method A if the coating thickness exceeds 125 microns. Our coupon has total thickness of 210-220 microns. Which test should be performed in this case? Could you please advise?

A. In my opinion you are better off using Method A, the "X" test.


Ron Joseph

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