finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsBooksHelpWantedAdvertiseForum
topic 4252

Passivation of coloured titanium


(2000)

I need to know different methods to passivate (anodized) coloured titanium. The problem is how to get the coulor more scratch resistant and better against corrosion. We have tried hot water without any improvement. We are (anodizing) couloring in manganese sulphate.

Does anybody know better methods?

Regards J˙rgen

J˙rgen Pettersson
- sweden


(2000)

Color on Ti is very thin. It is an oxide, so it is very passive as it is.

Since the coating is very thin, it has very little "wear" resistance. Changing the temperature and concentration of the solution or changing the solution to another may give a slight increase. In aluminum, hard anodizing achieves some of its wear resistance by the colder temperature giving tighter pores.

It is going to take a lot of trial and error testing.

Basically, Ti anodize is for cosmetic purposes such as jewelery and parts identification.

James Watts
- Navarre, Florida


(2000)

The anodizing you are referring to is a color produced by light interference; there is no real color, the oxide is transparent. You "see" the color because of a shift in the light wavelength as the reflection of light from the air/oxide verse the oxide/metal interface. As such the oxide is really thin..about 25-30 angstroms per volt applied. 250,000 of the little suckers = 0.001" So as far as a good wear coating, forget it! Good for jewelry but use it for ear rings not watch bands!

Now for anodizing for adhesive bond coating, very different. Also different "Tiodize" also called hard titanium anodize also ASM2488C very different. I am looking at it and if anyone can offer advise lets talk $$$$$.

Jon Quirt
- Fridley, Minnesota



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.