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Different approaches to Black "Plating" Aluminum [Pennsylvania] 

August 13, 2008

I am manufacturing frames for machines used in our facility using Aluminum 6061 Ground jig plate. I would like a black finish,but not painting because I do not want to significantly change the finished dimensions of the frames. I am looking for some suggestions, specs, etc. and local suppliers of this type of service. I think powder coating would be too thick.

Richard Snyder
Engineer - Lafayette Hill, PA

Is a dimensional change of 0.0005" per surface acceptable? If so you could consider Sulphuric acid anodising and black dye to MIL-A-8625.

Brian Terry
Aerospace - Yeovil, Somerset, UK