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Anodizing Of Titanium Alloy per AMS2488 Type II

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Q. I am setting up a titanium anodizing line to meet AMS 2488 [link is to spec at TechStreet] type II requirements. What is the correct chemical solution and operating parameters for the anodizing tanks (chemicals, concentration, pH value, temperature, voltage, amperage, timing etc). I have a stainless steel tank (316) of about W 2.5 inches x L 30 inches x H 21 inches in size with a chiller with heat exchanger made of titanium and a rectifier of 250A/100V.

Pang Choon, TAN
Singapore


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A. Hello, Tan. Unfortunately, just because there is an AMS spec for something doesn't necessarily mean the process isn't trade secret :-(

You might want to check into that before setting up the line, and make sure you don't require information that you can't get. Good luck. Regards,

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey

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Q. In fact, this is precisely what I had encountered. I had tried to get help and information from some of existing sources doing titanium anodizing but was not successful.

Unfortunately, I need this process and indeed I had already setup the physical line and tanks.

Do you know of any related information or any specialty suppliers that I could contact?

I had read the brochure from a company in the state called "TIODIZE" process which seems like titanium anodizing but do not know how to get contact with them.

Pang Choon, TAN
Singapore


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A. I obviously can't speak for the company you named, but twice in the last year I inquired of them if their process was licensable and was told that it's strictly for their own in-house use. But find them on the web and inquire yourself; maybe they will have greater interest in the offshore opportunity you can offer them than the ones I brought -- plus intentions change.

While I said you should check into the trade secret situation, I was only saying that you should check into it; I wasn't implying that it is impossible to conduct AMS2488 without violating a patent or trade secrets -- I don't believe that is the case at all. There are consultants you can retain who will give you the knowledge to do AMS2488. Good luck!

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey



October 30, 2008

Q. Hello;

Does SAE AMS 2488 standard include the chemical solution that should be used to get a type II product? Or is it just about something else?

Yours,

Anil Özmen
- Turkey

November 2008

A. Hi, Anil. As I recall, it says "alkaline"; it may specify "pH > 13" but I can't remember. You really need to have the spec in your hands if you are considering offering that process. It may contain provisos that you can't meet for some reason.

But what we were trying to explain is that the spec tells you some things that you must adhere to, but it doesn't tell you all the things you need to know to successfully alkaline anodize titanium. It's like a cookbook that says: "To make this cake you must use eggs no more than 1 week old, and sift the flour through a OOO sieve", but doesn't tell you the other ingredients or the baking time and temperature :-)

Good luck.

Regards,

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey


April 6, 2009appended

Q. NEED THE COMPOSITION OF SOLUTION TO ANODIZE TITANIUM TO MEET AMS 2488D

BERT SHERWOOD
CONSULTANT - LOS ANGELES, CALIFORNIA


April 12, 2009

A. We have developed both: alkaline and acid-based methods for anodizing titanium (titanium type II anodizing). Both methods develop strong titanium oxide layer for anti "cold-welding" and for corrosion protection. However, based on testing we think that acid-based titanium oxide is thicker and better for corrosion protection.

adv.
Contact us for more information.

anna_berkovich
Anna Berkovich
Russamer Labs
 
Pittsburgh, Pennsylvania

June 19, 2009

Q. Is there any update about Tianodize process. Even this week we had an enquiry for this process and we have no clue about this process. What is this all about? Is the substrate Titanium and needs to be coated with other oxides like MMO or other substrates which needs Ti coatings?
Thanks

Ramesh Kumar
- Singapore


June 22, 2009

A. Hi, Ramesh. No one previously used the word "Tianodize", and Google doesn't find that word. Are you using this word as a shortcut for "titanium anodize" or did you want to know more about the specific company called "Tiodize"? If you asking whether the trade secret information involved in alkaline anodizing has become public, no, it hasn't.

AMS 2488 [link is to spec at TechStreet] alkaline anodizing of titanium builds a corrosion resistant and gall resistant oxide surface on titanium; the best-known provider of that treatment is Tiodize, but other companies like Titanium Finishing Co. also specialize in it, and many general plating jobshops offer it.

If I did not answer your question, please clarify exactly what you want. Thanks!

Regards,

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey

August 14, 2009

Q. When you are doing Type 3 titanium anodizing what should the anode cathode ratio be?

Greg Burden
hobbyist - Middleburg, Florida



Hi Greg. That raises the question of what is Type 3 titanium anodizing :-)

I don't have AMS 2488 in front of me but I think it only has Type I and Type 2. It may be that there is no specification saying what Type 3 is, and some people simply choose to call color anodizing "Type 3" :-)

Regards,

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey



January 7, 2013

Q. We would like to expand our knowledge in these processes...specially when it is applied to titanium parts. Usually I find information on aluminum base processes. I'm looking for a Color and Type II Titanium Anodizing Seminar.

Mercedes Torres
- Humacao, Puerto Rico
  ^- Privately contact this inquirer -^


January 10, 2013

A. The titanium type II hard anodizing according to AMS 2488D is discussed frequently on finishing forums. Many companies who sell production lines, claim that multiple parts can be easily anodized in a single load. However in reality it becomes difficult to prove. After selling the equipment, the supplier withdraw from any help to the customers under the reasons like "you use the racking that is not delivered by us", or something similar. The reason is: multiple parts anodizing in simple sodium hydroxide solution is extremely difficult.

The companies who do in-house processing keep the additives and special regimes strict secret.

adv.
Not anymore: watch the YouTube video of simplicity of the titanium anodizing process, that can be installed in any small shop. Russamer Lab has developed the proprietary anodizing technology, fool-proof. Moreover it is no need to use sandblasting to remove unwanted "fur" coat after anodizing.

titanium anodized parts

Contact us for more information and samples.


anna_berkovich
Anna Berkovich
Russamer Labs
 
Pittsburgh, Pennsylvania

August 7, 2013

Q. Good afternoon,
I was wondering if someone can point me in the right direction for type II Ti anodization. I've read that it requires an alkaline solution for the anodizing tank, but I'm not sure if my distilled water and lye solution would be sufficient (since it is over pH 8). Also, I wanted to know the voltage and current specifications since I know that type I requires different voltages to achieve the different colors.

Emma Ge
- Miami, Florida, USA
  ^- Privately contact this inquirer -^


August 9, 2013

A. Hi Emma. Type 1 is a very thin translucent oxide coating which gains its color from the same diffraction process you see in carnival glass, or when a drop of oil falls into a puddle of water. The coating is a fraction of a wavelength long and favors a particular color depending on its thickness. By varying the voltage you can control that thickness. Many hobbyists practice it, and there are few secrets.

But type 2 is thick anodizing for wear and anti-gall purposes, rather than decorative value -- and how to do it well is a trade secret. Your options are:
1. to farm the work out to shops who operate the process and know how to do it,
2. to license the technology from firms like Russamer,
3. to retain a consultant who knows how to do it and will help you install it,
4. to start from AMS 2488 and perfect your own process.

The fifth option, getting someone to reveal those trade secrets to the world on the internet for free as a favor, simply isn't available. Sorry.

Regards,

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Brick, New Jersey

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