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Want to know formulation of Alodine 1200 and Candoclene

Dear sir.

We are using Alodine 1200s and Candoclene for the chromating of aluminium parts. As these are the commercial names and are not available in market, kindly suggest me the in -lieu chemical for Alodine and Candoclene. As far as I know Alodine is a chromic acid plus some other chemical. Kindly suggest me the percentage with chromic acid. And Candoclene is a NaOH and I think NaHCO3; kindly suggest me the exact ratio of chemicals involved, or some alternate of it. I need the moulded polypropylene tanks qty 07 for plating. Kindly suggest me the company address as I need in Pakistan.

Tariq Khan
- Attock, Punjab, Pakistan
2004

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There are numerous alternative suppliers of chromate conversion chemistry if you can't get Alodine; you can find a "Qualified Products List" for MIL-C-5541 chromate conversion coating as QPL-81706 [on DLA]. Sorry, I'm not familiar with Candoclene.

I am sorry that you are having difficulty finding these products, Mr. Khan, but no one can honorably give you the composition of a proprietary product whose ingredients are a trade secret. If you want to formulate chromate conversion chemistry yourself, the technical literature and expired patents will guide you.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004

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Thank you for your reply but I want to know the chemistry of alternate product of Alodine . It will be your kindness if you suggest me the chemicals or send me the required literature.

Thanks so much very kind of you.

Tariq Khan
- Pakistan
2004

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You want someone on this forum to give you proprietary secrets so you don't have to pay a legitimate supplier for the material that was originally researched and designed by some companies in the USA? You have no interest in using a supplier who is in business to make money from the knowledge he has worked to get over his business career. Assuming I knew or had that information available the chances of me giving you that info are "0". Business is tuff enough.

Drew Nosti CEF
Co-chairperson AESF Light Metal Committee
Member AAC Hard Coat Committee

Drew Nosti, CEF
Anodize USA

Ladson, South Carolina

2004

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Please search the technical literature and expired patents, Tariq. Every supplier regularly studies patents and their expiration dates to see what the competition does, and what they can legitimately do. The purpose of patent law is to serve the public by making inventions available to everyone after the inventor has had a reasonable time period to capitalize on it.

Hi, Drew. We've established that no one will give Tariq proprietary info. But there may be language difficulties here that are causing us to misread the inquiry. Perhaps this brand of chromate conversion chemistry isn't available in Pakistan, and literature from a brand that is available would satisfy him. Many reputable vendors literally had their stopwatches set for the expiration date on the HEEF-25 chrome plating patent, Drew -- there is nothing wrong with formulating per patent after the patent has expired.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004

The product Candoclene is a mild non-silicated cleaner for aluminium produced by Candor in Sweden. Local supply houses should be able to give you a suitable substitute if Candor product unavailable.

Graeme Lowe
electroplating technician - Sydney, NSW, Australia
April 18, 2009