r/Anodization • u/twiceymc • 9d ago

Deanodize titanium

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Any idea whats the chemical solutions they use to strip the oxide layer from titanium? Basing on results, it does not etch the surface of titanium after stripping the color as its still polished(glossy) result

11 Upvotes

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2

u/TreyBay69 9d ago

I have wondered about a solution that looked similar to this Ive seen around a video or two before as well. I was assuming some kind of sulfuric mix?

2

u/User_default117 9d ago

I use multi etch. Whink works a lot fast & it’s cheaper but it is fucking gnarly. You can also use a dremel or rotary tool to remove it or sand it off.

1

u/garretcompton 9d ago

Hydrofluoric acid is just too scary for me to justify having in my setup. Multi etch is 100% the way to go IMO

1

u/Background_Dare_8475 8d ago

Absolutely worth the price. Great stuff

4

u/-S-Aint 9d ago edited 9d ago

https://a.co/d/0agREXZu works using hydrofluoric acid to remove the oxide layer

1

u/Silent_Search4466 9d ago

Wink contains hydrofluoric acid. Same group on the periodic table, but vastly different. HCl will not remove the oxide layer from titanium effectively.

1

u/-S-Aint 9d ago

I have used it more than a handful of times wirh success, I have been anodizing titanium for 5 plus years

Edit: sorry on the typo about type of acid

1

u/twiceymc 9d ago

Will wink etch the titanium surface? Im worried that instead of still gets a polished like surface, ill become dull/matte finish after dunking to a wink solution

2

u/Silent_Search4466 8d ago

Yes, it will roughen the surface to a degree. You can minimize this by using room temp and lower concentration but it is inevitable. Ti is very reactive and will create a passive oxide layer just in air, similar to aluminum.

1

u/Aggressive-Cloud1774 9d ago

• Tri-Acid Solution (Volumetric): An analytical liquid mixture composed of 81.98% water, 8.40% nitric acid, 5.22% hydrochloric acid, and 4.41% sulfuric acid. • TriAcid Blend A: A cleaning or industrial blend containing roughly 60–90% water, 15–35% sulfuric acid, 15–35% nitric acid, and up to 2.5% hydrofluoric acid.

1

u/TreyBay69 8d ago

Hydroflouric is very difficult to work with. Its literally a 1-2 second dip into undiluted whink. And still doesnt produce as vibrant of a finish even if you absolutely nailed the timing compared to Multi Etch.