The authoritative public forum
  for Metal Finishing since 1989
  

  -----

Passivation of 306SS

2002

Hello everyone,

I am looking for some help here. I was wondering if Passivation on 306 SS can leave a blackish film (like oxidized metals). Plus, if it can leave a matte finish, thats even better, but it has to be a black film. The life of the film should also be an important aspect to be looked into.

I would appreciate it very much if you could share your knowledge of passivation.

Vikrant choksy
Enigma Jewels & Artifacts - Mumbai, India

Well the first question would be what type of passivation are you talking about, typically in my experience passivation on a 306 stainless part is a cleaning process, but there are several forms of passivating out there, I would need more specifics, all of our passivates that Stainless would go into are meant for a final clean on parts prior to inspection and packaging, so if you can give more detail, maybe I could help more. I don't understand how you would get a black film on stainless parts, something doesn't sound right.

Tony Schmaltz
- Kent, Washington
2002