Summary for black oxide finish Discussion
Black oxide finish cleaning allowances are the subject of this very short thread, but the excerpt only shows the opening question. The poster asks whether anyone has information about MIL-DTL-13924, the military specification for black oxide, apparently looking for guidance on cleaning allowances or related requirements. No answer text is included in the source excerpt, so there is no documented advice, interpretation, or recommendation to summarize from the thread itself. Because the discussion content is missing, the safest takeaway is simply that the question concerns the applicable black oxide specification and its cleaning-related limits or allowances, but the thread excerpt does not provide a resolution.
Q. Does anyone out there have any information about MIL-DTL-13924
[⇦ this spec on DLA]?
This is a Black Oxide coating standard. I am especially interested in Class 4. We received the parts in an odd-smelling oily substance.
(It was not unlike a mixture of a cutting fluid and WD-40
⇦ on
or
Amazon [affil link]
. It was extremely lubricious.) This was an outside vendor operation (the final step before shipping to our customer.) Wiping the parts clean by hand is really not feasible. By cleaning the product chemically, do I risk removing any of the black oxide finish?
Ryan Spaulding
Manufacturer – Southboro, Massachusetts
2005
A. You can download this spec for free from the page referenced at finishing.com/faqs/milspecs.shtml. Class 4 applies to corrosion resistant steels which are supposed to be able to pass a 96-hour salt spray without any oil. Solvents should be able to remove the oil without removing the black oxide, but it’s not clear if you would be within spec in doing that.
Any oiling and post treatment should be covered clearly by the customer spec, as 13924D does not specify oil or freedom from oil, only that it be done per other instructions.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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