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Hard Anodising LM25 / ADC10 die cast aluminium

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We are experiencing difficulty in achieving the required depth of Hard Anodising of aluminium alloy ADC10 (supposedly the Japanese eq. of LM25).
The part die cast, and we are looking for a depth of 20 microns on an unmachined face.

Can anyone verify if this is a result of the high silicone content of the surface of the face?

Kevin Fuller
- Southend on Sea, Essex, UK

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We typically get only 1/2 to 7/10ths of a mil (i.e. 12 to 18 microns) on high silicon 380 die cast aluminum. It's too powdery thereafter even if we could get more. You're getting what most hardcoat processes can provide on this highly alloyed aluminum. Good luck!

Milt Stevenson, Jr.
Anoplate Corp

Syracuse, New York

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