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How to passivate AISI 410 Stainless Steel at own work shop
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.
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.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
March 25, 2014
Much of what you are asking is covered merely by consulting the industry standards such as ASTM A967 / A967M [affil. link to spec at Techstreet] and ASTM F1089 [affil. link to spec at Techstreet] .
Stellar Solutions, Inc.