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Metal finishing Q&As since 1989

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Anodizing Al cast

Is it possible to anodize Al cast if there are steel parts inserted in it (incovered). If not, why?

Atanas Irinchev
- Miami, Florida, USA
2004

First of two simultaneous responses --

If the steel is exposed to the anodizing solution it will be destroyed.

Jeffrey Holmes, CEF
Spartanburg, South Carolina
2004

Second of two simultaneous responses --

The anodizing process uses a sulfuric acid solution that will dissolve uncovered steel parts. It can be done if the steel parts are thoroughly masked using RTV silicone or other simialar masking agent.

Ray Coogan
- Lake Havasu City, Arizona, USA
2004

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