-- 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 3473

Chemical for brightening aluminium pressure die castings

Please suggest a chemical or electrobrightening process for aluminium pressure die casted parts to be anodised later.

Nippinder Singh
- India

On wrought or extruded alloys we use to use a 93% phosphoric acid and 7% nitric acid mixture with a few PPM of copper. The solution was used at 190 deg F. As you can see this is a very nasty and dangerous mixture. I don't know how it would work on castings, you would probably run into all the common problems encountered when plating castings. If you decide to try this mixture make sure you use all safety precautions and have good ventilation.

As an alternative some of the major electropolish solution suppliers have proprietary products that are very alloy specific. I would suggest contacting some of them. Two that come to mind are EPS Inc. in Menomonee Falls, Wi. and Metal Coating Process Corp. in Charlotte, NC. I'm sure there are other readers out there who can suggest more.

Rick Richardson, MSF
Dayton, Ohio

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.