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Discoloration after passivation

Well we are doing the pickling and passivation of cladded ( Inconel 825 ) pipes. Well the problem is, during and after cleaning we are getting, yellowish/ greenish in color. What would be reason ?

thanks and regards

Navin Kumar Tiwari
- Dubai, UAE
February 110, 2011

Please give info as for the process you use so we can try to figure where the problem comes from.

Sara Michaeli
Tel-Aviv-Yafo, Israel
February 17, 2011

Navin

Does Inconel 825 need to be passivated?

Being a high nickel content material, I would suspect the yellow-green color is from the nickel.

Willie Alexander
- Colorado Springs, Colorado
February 19, 2011

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