Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

How to achieve satin finish on anodized aluminum

I'm looking for a method of producing a satin anodized finish on aluminum parts. I've tried glass beading the surface before anodizing but that makes a finish that's too flat and collects dirt and fingerprints. I've tried brushing the parts with Scotch Brite before anodizing but that is too labor intensive and it's tough to get a uniform appearance. Is there a chemical etch or a media besides glass beads that would work?

Tom Griffin
Mechanical designer - Ann Arbor, MI, USA
November 3, 2009

Try using different grits of white aluminum oxide and at different pressures. I would start with 120 grit and work from there.

James Watts
- Navarre, Florida
November 4, 2009

You could try mixed chemical solution of ammonium nitrate and ammonium bifluoride (sorry I forget the formula).

John Hu
- Singapore
November 6, 2009

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

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: