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Ted Mooney, P.E. RET
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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.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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
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