-- The Home Page of the Finishing Industry

on this site
current topics

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

topic 8505

Etching of Stainless Steel Materials


I want to get a hold of a formula for a smooth chemical etching of 431 stainless steel and ph 17-4 stainless steel. I have tried several different solutions however their attack is not consistent and leave an uneven surface. I need to have a smooth finish. It doesn't have to be bright, just smooth.

Jeffrey Jones
- San Diego, California


Normally a Nitric acid / hydrofluoric acid is best.

About 30 to 40% nitric by volume and 3 to 4% Hydrofluoric acid remainder water.

Fume extraction is required and great precautions in the handling of HF. Breathing fumes is very toxic and the acid must be treated with great care.

Should give you a smooth surface if etch is restricted to say 5 minutes

Bernard Irving
- United Kingdom


There is another option: electropolishing in salts, but special equipment is required.

Anna Berkovich
Russamer Lab
supporting advertiser 
Pittsburgh, Pennsylvania 
russamer labs banner is possible thanks to our supporting advertisers, including this one:


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.