L.S,
I am working in the biotech industries and in this working field for production equipment stainless steel is used. In my department people work with 316L or 304L SS micro mesh filter screens. These screens are ordered at an external company. Before we use these screens in our production process they are treated with Sodium Hydroxide solution and after the base rinse they are treated with Nitric Acid solution. Does anybody in this newsgroup knows what is the sense of this process? We call it a passivation process...
Regards, Maurice.