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Parameters for Anodizing Zirconium

Q. I am looking for information about "Anodizing Zirconium".

What technical journals are available that can be recommended to learn about Anodizing Zirconium.

Please let me know.

Joe Hillock
anodizing shop - Philadelphia, Pennsylvania
1998

A. Hi, Joe. U.S. Patent 3864220 speaks of anodizing in 1 percent phosphoric acid at 25 volts. Hobbyists on several forums say that it can be done very similarly to decorative anodizing of titanium, and indeed 1 percent phosphoric at 25 volts sounds like it would work for titanium :-)

An article in J.E.C.S. (India), vol. 38, 1989 by Padmavathy, Kalyani, and Sastry is entitled "Rate of Formation of Anodic Film on Zirconium in Phosphoric Acid & Its Sodium salts". Although I don't have a copy, it sounds like it further supports phosphoric acid as an electrolyte. Metal Finishing Information Service in England could presumably do a literature search for you and provide copies of articles.

I understand that zirconium can also be anodized in molten salts, but that doesn't sound like what you're looking for. Good luck.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey

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