No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

finishing.com -- The Home Page of the Finishing Industry

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Hard Anodising of high silicon content aluminum alloys

1996

I need to put a thick oxide layer ( more than 30 microns ) when hard anodising high silicon content ( over 10%) aluminum alloys .
These alloys are used by the foundries . Typically in the US it would be a 390 alloy .

Has anybody an idea of how to do that ?

All the tests we have done so far have resulted in an oxide layer thickness under 10 microns .

Thanks for your input .

Eric LABORDE - France

The devil is in the details, Eric, but in general the way you get thick hard coatings, is to keep the temperature way down (25-32 °F. / -4 to 0 °F.), and apply high voltages (50 or more volts is not uncommon). But that is a great deal of silicon and certainly sounds like a problem :-(

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.

You need a specialty chemistry hardcoat system for high copper alloys

David A. Kraft
- Long Island City, New York
1996

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

Disclaimer: It's not possible to fully 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 might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: