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topic 5146

Anodizing or Color Finishing of Titanium


I am trying to find out any info on anodizing or the finishing of 6AL-4V titanium.I have seen in some posts that anodizing can be done and if so what is the range of colors. The part will be a casting if this helps. Thanks to all that help!

Buck Jones
- Roanoke Virginia USA


It takes from 0 - 240 volts to get the variety of colors. Exact voltage control is mandatory to reproduce the same color. It will work on castings, but not quite as well. It is not as bad as aluminum or zinc castings to treat. Going from a hot rinse to a cold rinse a few times before you start will tend to fill the pores with water rather than chemicals, so there will be less bleeding when you finish.

James Watts
- Navarre, Florida


You can get a kaleidoscope of colors when anodizing titanium. Solutions of various electrolytes are used: sulfuric acid, phosphoric acid, sodium hydroxide, ... As stated above, the voltage and time applied as well as electrolyte concentration will determine the color produced.

Titanium anodizing is one of those finishing processes that very closely approaches "art"; it takes a lot of leg-work, tank work, trial and error. There are some very good finishing houses that have perfected the process in terms of color matching, etc... Your alloy is a common one and should present no special problem to anodize.

Megan Pellenz
- Syracuse, New York


I am looking for a testing laboratory who can perform the wear resistance and propellant compatibility tests on Titanium anodized samples according to AMS 2488 [link by ed. to spec at TechStreet]C. Can any one help me out here, please. Thanks

Jonnathon Tan
Singapore - Singapore

Ed. note: One of the site's supporting advertisers listed in the "Testing" directory can probably help you, Jonnathon.


Need information on the Watervilet Process, chemical composition & other operating parameters.

Jim Chan
- Granger, Indiana

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