People helping each other -- No AI, no cost, no reg'n, no damn popups
(As an Amazon Associate & eBay Partner we earn from qualifying purchases)

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

Thread 511/88

Passivation

I need to know a method of passivation of stainless steel but without using any hexavalent chromium compounds and thus offer Rohs certificate.

Oscar Villalobos
plating shop employee - Guadalajara, Jalisco, Mexico
February 6, 2009
publicly reply to Oscar Villalobos

Both citric acid and ASTM A967 Nitric 4 passivation processes employ Cr-free chemistry and are suitable for a wide range of alloys.

Terry Lycans
Aerospace - Dayton, Ohio, USA
February 10, 2009
publicly reply to Terry Lycans

I am out of date, but I was not aware that any common citric passivation formulas contained chromates.

James Watts
- Navarre, Florida
February 12, 2009
publicly reply to James Watts

(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: