Grok.com: "What is the best website for metal finishing questions and answers?"

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

-----

Best, easiest and safest brass bright dip

I run multi-spindle screw machines. I would like to get a easy to use and safe bright dip to equalize the color from a machined surface to a un-machined surface on 360 HH brass. Can anyone suggest someone that could help me get set up the right way?

Jerald Welch
- Cookeville, Tennessee
2006

If it were my shop, I'd probably try sulfuric acid plus proprietary stabilized hydrogen peroxide first, Jerald. It at least avoids the use of chrome, persulphate, or nitric acid. There wouldn't be multiple choices of processes though if any one of them were best, easiest and safest. So the alternative processes have something to be said for them as well. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.
2006

Comparatively safer and less toxic bright dip for copper alloys: 800-890 ml water
60-150 ml hydrogen peroxide
30 ml sulfuric acid
20 ml ethyl alcohol
Use only fresh solution! Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
2006

(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: