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Thickness of Chromate Conversion Coatings



(-----) 2007

Hi,
My name is Thomas Kelly, I am a MEng student currently working at Goodrich Engine control Systems in Birmingham, England. As part of my work placement I am undertaking a project to look at Alocrom (Hexavalent chromium conversion coating) replacements. I am looking at a range of products;

Alodine 5200
Iridite NCP
Surtec 650 (TCP)
Sanchem Safeguard 3000CC

I was wanting to know how thick these coatings are? I have had some trouble finding this information from the suppliers info and also varying reports on the thickness of the current Alocrom (Alodine 1200) coating.

Any help would be much appreciated,

Cheers

Tom

Thomas kelly
Student/Materials Engineer - Birmingham, England
^


2007

If the manufacturers won't say, I don't know that any of us can, Tom. But if it helps, I can at least tell you that they are so thin that they will not affect your tolerancing (measured in millionths of an inch rather than ten thousdandths).

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


2007

In addition to what Ted already stated, the thickness of chromate conversion coatings (hex or tri) will vary greatly by the parameters of the application and handling of same.

Gene Packman
- Great Neck, New York
^

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