Summary for aisi 410 passivation Discussion
passivation of AISI 410 stainless steel is answered most directly by Ray Kremer, who says the short version is to use 20 to 40% by volume of 70% nitric acid in water and immerse the parts for 30 to 60 minutes at 60 °C. He also notes that before choosing a process, the shop must decide whether to use nitric acid, citric acid, or electropolishing, since passivation is not a one-size-fits-all step. For verification, he points the reader to a separate discussion on simple passivation testing for 420 / 4xx / 400 series stainless steel. The original question asked for an easy, complete procedure for passivating a surgical needle holder made from AISI-410, including chemical percentage, time, and the difference between boil testing and passivation. No boil test formula is given in the excerpt, only a reference to further testing information.
March 7, 2014
Q. How can we passivate Needle Holder of General Surgery Material AISI-410.
Want complete Detail about Procedure in easy way.
1) Chemical percentage %
2) Time to be passivated
Also inform difference between boil test and passivation. If someone has boil test formula inform me.
Thanks in Advance.
Muhammad Nasir
Company Owner – Sialkot , Pakistan
A. Hi cousin Nasir. The short answers are:
1). Add 20 to 40% by volume of 70% Nitric Acid to water.
2). Immerse for 30 to 60 minutes at 60 ° C.
For information on testing and verifying passivation, please see letter 4842, “Simple Passivation Test for Type 420 / 4xx / 400 Series Stainless Steel?”
But we have dozens of fairly longs threads on the passivation of stainless steel on-line here if you search the site. Obviously, if your two short questions could be properly answered in a paragraph or two, those other threads wouldn’t be here 🙂
You really have to start by making a decision of whether you will use nitric acid vs. citric acid vs. electropolishing for the passivation. Best of luck.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.
March 2014
A. Muhammad,
Much of what you are asking is covered merely by consulting the industry standards such as ASTM A967 and ASTM F1089.
Ray Kremer
Stellar Solutions, Inc.
McHenry, Illinois
March 25, 2014