Anodizzare l'alluminio

Ciao,

A discussion on news:uk.rec.models.engineering , via

-------------------------------------------------------------------------------- I am using the free version of SPAMfighter for private users. It has removed 39 spam emails to date. Paying users do not have this message in their emails. Try SPAMfighter for free now!

Ciao,

---------------

The process described s a not hard anodizing but decorative.

Anodizing aluminium is easy but the simplest way doesn't works with all the aluminium alloys. You will have bad results with 2017 and 2024 (dural) excepted with very dark colors. It works well with the 5xxx, 6xxx and 7xxx serie.

The steps are :

2- Anodizing.

For this operation you need a non conductive tank (pyrex is well) and a power source about 15 V (a 12V car battery is fine, it's a 13,8 V one !); the solution in the tank is 80% distilled water and 20% sulfuric acide. Connect the anode (+) to the aluminium part and the cathode (-) to a large sheet of lead (with gloves please !); The density of the current will be a bout 1A to 2A dm2. You can use a variable resistor for the regulation or some car light bubbles. Let in the bath for 30-40 mn. After that you will rince the part with water and a basic solution (ammoniac, soda ash, Deskstop ...)

The most findable coloring agent in France is used for clothes under the brand name DYLON. It's a powder you add to boiling water. Immediatly after anodizing put the aluminium part in the colored boiling water during 2 or 3 minutes. Dry it and repeat until you find the best coloration.

We have opened the alumine cells by anodizing, colored them and we must closed the cells. There is different solutions.

- Hot water just before boiling (

Ciao,

You could contact Maurizio Martinucci

-> particolari in ergal anodizzato.

Or Massimo Ferraresso

-------------------------------------------------------------------------------- I am using the free version of SPAMfighter for private users. It has removed 39 spam emails to date. Paying users do not have this message in their emails. Try SPAMfighter for free now!