-- The Home Page of the Finishing Industry

on this site
current topics

60,000 Q&A topics -- Education, Aloha, & Fun

topic 17839

How can I get a satin finish on aluminum using an acid solution?


Dear sirs,

As we produce aluminum caps in Brazil for the cosmetic industry, we are trying to reach a satin finish using an acid solution that would not react with our titanium racks.We have tried caustic soda (basic solution) but we don't get the finish (satin) we need. Can some one help me with this problem?


Katia Endo
- Rio de Janeiro, Brasil


1. Try adding Sodium Fluoride to the Caustic Etch, first 1 oz/gal , then try 2 oz/gal

2. Try Phosphoric Acid with Detergent. Many commercial products in varying strengths are available or you can lash up your own. Try it cold, then warm, then hot.

If any of the above gets close but not exact, then tell us and come back for more suggestions.

robert probert

Robert H Probert
Robert H Probert Technical Services
supporting advertiser
Garner, North Carolina


Thank you for your reply, but what do you mean when you say I should use detergent, what kind of detergent should I use?


Katia Endo
- Rio de Janeiro, Brasil

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

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 Compliance

©1995-2020, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.