Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Passivating heat tint areas
In fabricating frames using 316L pipe with six welded joints there are areas of heat tint which require passivation. The extent of the welding is minimal, 10 linear feet and restricted to the corners and two locations mid span.
What method of passivation would you recommend to accomplish this passivation?
Thank you
Regards
John
Job shop employee - San Diego, California
January 20, 2009
John,
For something like that the easiest thing to use is a citric acid based passivation gel or a nitric acid based pickle paste. Let us know if we can help.
Ray Kremer
Stellar Solutions, Inc.
McHenry, Illinois
February 12, 2009
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