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AMS2489A - Blackening of Steel Touch Up Method

Document Number: AMS2489A
Revision Number: A
Blackening of Steel Touch Up Method

This specification covers the requirements for an inorganic black coating applied at ambient temperature to steel to touch up black oxide coating in areas where the black oxide has been removed. This coating is intended only to visually change the surface to a black color, not to meet the requirements of any black oxide specification.

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