![](/assets/images/picto-drapeau-france-3a76576a5d60a512053b4612ab58dae5.png)
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 :
...
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference
This article is included in
Metal treatments
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Mechanism of anodic layer formation
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)....
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
![](/assets/images/logo-eti-286623ed91fa802ce039246e516e5852.png)
The Ultimate Scientific and Technical Reference