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Thread 515/25
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,
Hobbyist - Sabaneta, Antioquia, Colombia
March 6, 2009
publicly reply to Gabriel Munera Guicciardi
A. Strip the anodize in a mild caustic or mild acid tank.
James Watts- Navarre, Florida
March 11, 2009
publicly reply to James Watts
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
publicly reply to Goran Budija
March 12, 2009
ANSWER part II/
You can use any concentration of oxalic acid
⇦ this on
eBay or
Amazon [affil links]
(you must use rubber rubber gloves
⇦ this on
eBay or
Amazon [affil links] , 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!
- Cerovski vrh Croatia
publicly reply to Goran Budija
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
Sampedro medical industries - Sabaneta, Antioquia, Colombia
March 24, 2009
publicly reply to Gabriel Munera
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!
- Cerovski vrh Croatia
March 26, 2009
publicly reply to Goran Budija
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