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2. Mechanism of anodic layer formation
Electrolysis in an aqueous medium with direct current normally produces off-gassing at both electrodes (hydrogen at the cathode, oxygen at the anode). However, if aluminum is used as the anode, no off-gassing is observed at the anode, while hydrogen is always visible at the cathode.
To a first approximation, this phenomenon can be described as a combination of dissolved aluminium and nascent oxygen, according to the reaction :
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Mechanism of anodic layer formation
Main processes and their applications
Bibliography
Standards
- Anodizing aluminum and its alloys – Determination of mass per unit area (mass per unit area) of anodic layers – Gravimetric method. - • NF EN ISO 2106 - Avril 2011
- Anodizing aluminum and its alloys – Determining the thickness of anodic layers – Non-destructive method using an optical sectioning microscope. - • NF EN ISO 2128 - Octobre 2010
- Non-conductive coatings on non-magnetic base metal – Thickness measurement...
Appendices
Manufacturers – Suppliers – Distributors
(This list is not exhaustive)
Amet anodizing (70).
AB decometal (77).
Aloxan (67)....
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