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topic 1380

Anodizing Titanium 6-4


I am looking for information on the relationship between applied voltage and the color obtained during the anodizing process of titanium. For example what voltage is required to obtain a blue coating, or a green coating, etc.

Thanks, Chris

Chris Gervais


Data for 6-4 Ti is not going to be the same as CP Ti. It also will not anodize as well because you are looking at 10% alloy. The aluminum will anodize at a much lower voltage than the Ti and will look different than the Ti. I think the Vanadium will not react or will dissolve. In short, I think you will get funky looking anodized parts.

You can get a how to do it manual from Reactive Metals Studio, Inc. in clarksdale , AZ


James Watts
- Navarre, Florida


Ti6-4 surgical instruments are routinely anodized for color coding. The first blue color appears around 28 V. The exact relationship between color and voltage will vary with each setup. You will have to experiment. If you are using titanium clips to hold the work, the anodized layer on the clip will need to be removed mechanically or in a dilute (5%) HF solution (handle with care) between each run.

Paul Vernon
Designed Materials Research


I would like to know the anodizing solutions of titanium.

Actually its the platinum titanium I am looking for. Do you have any information on that?

MINTEK - Zaire

Mr. Adams, see letter 937

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey


where can you get an economical anodizing machine?




I'm afraid we'd need more info to be able to properly answer your question. An anodizing line for an aircraft manufacturer might be $5 million and still be considered a very economical machine whereas some people who want to do anodizing in their basement feel that $79 is too much to pay for the power supply.

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

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