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topic 5381

Anodising Aluminium: Concentrations Measurement


(2000)

We have a small anodising unit for aluminium nameplates. We use the standard conditions: 15 Amps/sq ft, temperature 20 C, electrolyte sulfuric acid 11%. I want to control the aluminium concentration and the sulfuric acid concentration. I thought our aluminium concentration should be 5-15 g/liter.

I know that there are different ways of measure it:

I want to know the following things: - which of them are the most suitable for the standard anodising conditions and for a small unit like us. - do the limits of aluminium concentration precise enough to give a good quality. Thank you for your advices and your answers. Merci. Cedric ODY
Cedric ODY
- Dublin, Ireland


(2000)

Try to stay below 10 g/l Al and use a titration for control. Get back to us if you need analytical methods.

James Totter
James Totter, CEF
- Tallahassee, Florida



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