-- 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 2230

Passivation of 2205 duplex stainless steel


Q. Has anyone has experience with pickle/passivation or electropolishing of "UNS 31803 (2205 duplex stainless steel). Need information on composition, corrosion resistance, mechanical properties, cost per pound, availability, and special fabrication considerations.

Hunter Cutchin
- Easley, South Carolina


A. Dear Hunter:

2205 is 22%Chromium /3%Moly /5% Nickel /0.15 Nitrogen.

It is a good grade between the Ferritic and Austenitic groups, and can be passivated well with citric acid formulations per our experience.

lee kremer
kremer signature
Lee Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
stellar solutions banner

March 14, 2013

Q. We are in the process of casting drive chain out of S32205 and S32760 stainless steel for a customer who plans to use the chain for cycled intermittent sea water immersion. We are curious if ASTM A 967-05e1 Nitric 2 and Nitric 3 are the most effective methods for passivating these alloys? Thanks.

Mike Humcke
- Pewaukee, Wisconsin

April 16, 2013

A. Mike,
Personally, I tend to think that citric acid based passivation is the "most" effective, but if you are committed to nitric, those are duplex grades and the treatment chart in the standard does indicate Nitric types 2 and 3 for duplex.

ray kremer
Ray Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
stellar solutions banner

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.