PROPERTIES OF FERROMAGNETIC MATERIALS INSIDE THE MATRIX OF ANODIZED ALUMINUM COATS
Abstract
Anodic coatings can be made highly conductive by proper impregnation with copper or silver sulphide. No other compound from about thirty tried were able to impart substantially this property to the coating. The above results confirm that acid electrolyte anodic coatings, while in part porous, have an internal barrier layer at the bottom of the coating between the aluminum base and the porous part. The barrier layer can be conductive probably in reason of one or a combination of the following processes: (1) by tunneling effect, if the barrier is thin enough for the voltage amplified; (2) by electrolytic diffusion of copper or silver ions under the action of an electric field; and (3) by a doping action taking place at the barrier during the impregnating process.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1962
- Accession Number
- AD0404485
Entities
People
- J. M. Alameda