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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Passivation
I need to know a method of passivation of stainless steel but without using any hexavalent chromium compounds and thus offer Rohs certificate.
Oscar Villalobosplating shop employee - Guadalajara, Jalisco, Mexico
February 6, 2009
Both citric acid and ASTM A967 Nitric 4 passivation processes employ Cr-free chemistry and are suitable for a wide range of alloys.
Terry LycansAerospace - Dayton, Ohio, USA
February 10, 2009
I am out of date, but I was not aware that any common citric passivation formulas contained chromates.
James Watts- Navarre, Florida
February 12, 2009
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