Friday, April 23, 2010

[MW:4943] SS410S material -Pickling & passivation

Dear All,
 
I am working as a static equipment engineer for refinery&petrochemical projects.
 
As per Owner requirements All SS tray assemblies to be pickled & passivated.
 
Howeever the tray vendor claims it is not applicable for SS410S as pickling & passivation may lead to white & brown pathches on trays.
 
Please clarify if pickling & passivation for SS410S (martensitic grade) materials is applicable or not?
 
Awaiting your prompt response.
 
 
Yours
 
Salman Hussain,Baroda,India.

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