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How to chromic anodise black



(-----) January 14, 2008

A CUSTOMER HAS ASKED FOR THIS FINISH.

PHIL YEOMANS
Plating shop employee - UK
^


January 14, 2008

Interesting question, Phil, thanks. I've never heard of doing this, so I await some feedback from one of our experienced readers.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
^


First of two simultaneous responses -- January 15, 2008

Chromic Acid Anodzing can be dyed black, not very pretty, but black enough to color code.

robert probert
Robert H Probert
Robert H Probert Technical Services
supporting advertiser
Garner, North Carolina
probertbanner
^


Second of two simultaneous responses -- January 16, 2008

I have seen this sort of request on several occasions recently. It's almost as if designers have decided that Chromic anodise will absorb dye like Sulphuric anodise.

What they are essentially after is Chromic acid anodise with a supplementary black dye. It can be done but the results are highly variable and you will never get a consistent black colour, you will get plenty of shades of grey/red/blue, depending on what the dye base colour is.

Brian Terry
Aerospace - Yeovil, Somerset, UK
^


January 16, 2008

Chromic Acid Anodiizing can be dyed black, not jewelry pretty, but black enough for color coding.

robert probert
Robert H Probert
Robert H Probert Technical Services
supporting advertiser
Garner, North Carolina
probertbanner
^

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