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topic 55827

Is touch-up allowed in Mil-A-8625?




A discussion started in 20010 but continuing through 2018

September 29, 2010

Q. Does the mil-spec allow "touch-up" rack marks, scratches, Masking mistakes with paint?

Andrew WITMER
BUYER - Lancaster, Pennsylvania, USA


October 18, 2010

A. Yes, unless otherwise specified. Mil-A-8625 [link is to free spec at Defense Logistics Agency, dla.mil] F states that, 3.3.4 Touch up ( mechanical damage and contact marks ). Unless otherwise specified, mechanical damage areas from which the anodic coating has been removed without damage to the part may be touched up using chemical conversion material approved by QPL-81706 [link by ed. to spec at TechStreet] for class 1A coatings and the applicable method of application.Touch up shall apply only to inadvertent mechanical damage such as scratch marks. For type III coatings, touch up shall only be allowed in areas which will not subjected to abrasion. The mechanical damage areas shall not exceed 5% of the total anodized area of the item or touch up shall not be permitted.When specified in the contract or purchase order , contact marks shall be touched up using the above method required for mechanical damage.

SK Cheah
- Penang, Malaysia

November 6, 2018

Q. I found the same reference in Mil-A-8625 [link is to free spec at Defense Logistics Agency, dla.mil] to use alodine as touch-up for hard anodize. The issue, of course, is appearance. Is there any reason why it would not be acceptable to use black paint or even marker over the alodine touch-up to make the appearance more uniform?

Yossi David
Rugged computers - Herzliya, Israel



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