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Needing to know what CRONAK is?

June 5, 2008

I work for the Department of Defence and we have come across this finish that we have no notes on. I was wondering if you could tell me what it is and maybe how it is made. More speciifically I need to know the Density and Thickness that this finish uses.

Aaron Gambill
Government work! - Crane, Indiana

June 5, 2008

Hi, Aaron. Cronak was apparently an old-fashioned chromating process (see letter 10837 for discussion). Chromate conversion coatings are complicated mixtures; sorry I don't know the typical density or thickness of a Cronak finish.


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Ted Mooney, P.E. RET
Pine Beach, New Jersey

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