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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsGeneral Corrosi...General Corrosi...Passivation of 316Stainless steelPassivation of 316Stainless steel
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1/24/2003 9:00 AM
 
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I am currently performing a citric passivation step on a 5RA finished, 316VIM/VAR stainless steel surface as required in UHP manufacturing. My question is, do I change the surface chemistry of the polished, passivated surface by heating the part later in the process. Specifically, we are thinking of adding a 4 hour, 200DegF bakeout of the part, and I am concerned we may start to redeposit free iron onto the surface. Does anyone know if this will be a problem, and if so, at what temperature can I go to without redepositing the free iron. Thanks for the help!!!
 
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1/25/2003 9:00 AM
 
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Dear Sir: If you are intending to conduct a 200F bakeout in a furnace or other atmospheric heating medium, redepositing free iron should not be a concern. David Hendrix The Hendrix Group Inc.
 
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