kb0nes
Well-known member
Great pic, thanks for showing us what you see!
If the spot really bugs you, buff it a little with some fine Scotchbrite. That will remove the rust spot right away. A bit of CLR or Oxalic acid would probably wipe it away too.
When stainless steel is formed, rolled, cut, machined etc., its always possible that a small fragment of steel from the machine tool can be pressed or embedded into the surface. This material will rust and cause a visible stain like this. Passivation is a post finishing process where they soak the stainless piece in a warm acid and it dissolves away any ferric (steel) molecules on the surface to prevent this from happening. It helps to restore a clean, passive corrosion resistant layer on the surface. Its usually only done for critical pieces for medical or food processing industries. It would be WAY overkill for a laundry tub!
I'd just continue to use the machine, the clothing will polish the inside of the tub soon enough. I would NOT call for service, this is a non-issue unless is doesn't go away after a while.
If the spot really bugs you, buff it a little with some fine Scotchbrite. That will remove the rust spot right away. A bit of CLR or Oxalic acid would probably wipe it away too.
When stainless steel is formed, rolled, cut, machined etc., its always possible that a small fragment of steel from the machine tool can be pressed or embedded into the surface. This material will rust and cause a visible stain like this. Passivation is a post finishing process where they soak the stainless piece in a warm acid and it dissolves away any ferric (steel) molecules on the surface to prevent this from happening. It helps to restore a clean, passive corrosion resistant layer on the surface. Its usually only done for critical pieces for medical or food processing industries. It would be WAY overkill for a laundry tub!
I'd just continue to use the machine, the clothing will polish the inside of the tub soon enough. I would NOT call for service, this is a non-issue unless is doesn't go away after a while.





