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Erasing colors in anodised titanium?





Q. Definitely, I can't live with out FINISHING.COM. Now the question...

I'm coloring titanium, how can I erase the colors if I don't like it, without using pickling? (H2NO3+HF)

Thank you for your help,

Gabriel Munera Guicciardi
Hobbyist - Sabaneta, Antioquia, Colombia
March 6, 2009


A. Strip the anodize in a mild caustic or mild acid tank.

James Watts
- Navarre, Florida
March 11, 2009



"CRC Handbook of Metal Etchants"

on AbeBooks

or Amazon

(affil links)

A. You can use fine sandpaper and I think that it can be removed without HF based mixtures. Try uspto.gov website -- maybe there you can find some useful expired patents on that subject. Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
March 12, 2009



March 12, 2009

ANSWER part II/
You can use any concentration of oxalic acid [affil links] (you must use rubber rubber gloves [on eBay or Amazon] , it is toxic but harmless if compared with HF) or even 20% hydrochloric acid.
According to CRC handbook of metals etchants, New York 1991..

Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia


Q. Thank you for all your replies. At this time I couldn't try any but I'll do this week. I wanna ask to Mr. Goran Budija if the treatment with oxalic acid could damage the mechanical properties of the Ti?
again thanks you all

Gabriel Munera
Sampedro medical industries - Sabaneta, Antioquia, Colombia
March 24, 2009


A. This solution can etch titanium at any concentration-according to CRC Handbook of Etchants, New York 1991.

Any beekeepers shop must have it (it is medicine for some bee diseases). KOH solution can be used too (with or without H2O2 addition).Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
March 26, 2009




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