Incoloy contamination
Incoloy contamination
(OP)
I am working with some Incoloy Alloy 825 (UNS 08825). Cross contamination with carbon steel is a big issue for the client. I am now wondering what effect cutting fluid containing sulphur would have on the Incoloy.





RE: Incoloy contamination
Cutting fluids with sulfonated oils are worse than those containing MoS2. The former burn and adhere to the surface under heavy cutting conditions. Remove all traces of organics and staining prior to passivation for removal of steel contamination (organics cause nitric acid to etch rather than passivate).
Degrease and then use a high pH electrocleaner – Oakite 90 is a good one – to remove any staining. Then do a normal passivation.
RE: Incoloy contamination