-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
on this site
current topics
topic 3805

Al2O3 foil by anodizing


I am interested in possibility of formation thick amorph Al2O3 film on Al foil and then etching the foil down . Maximum thickness achievable? Thanks.

Roman Khait
- Jerusalem,Israel


Hi Roman, What are the purposes for the process you suggested? You can anodize aluminum first and but do not etch the anodized aluminum, because etching will completely remove the oxide formed on aluminum surface. If you are looking for a process to enhance surface area, I suggest you to follow the process used in producing electrolytic capacitors, in which electrolytic etching is used to generate a highly porous surface on aluminum foil and then the etched foil is anodized in boric acid-based electrolytes to form a thin layer of non-porous aluminum oxide film (<0.5 microns) as a dielectric material. The maximum thickness of the resultant oxide film depends on many factors, such as electrolyte and concentration, temperature, voltage, current density, time, and even material itself (foil thickness). Remember, aluminum oxide is very brittle, so the anodized aluminum foil is very easy to break. I understand you have good ideas on your project, but you need to invest a lot to achieve your goals.

Good luck. Ling

Ling Hao
- Grand Rapids, Michigan

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.