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Oxidation Passivated Film of Stainless Steel

The surface is damaged by mechanicha polishing.


 Structure of mechanically polishing surface

The surface of material becomes smooth after protrusions are removed from the surface by EP.

EPprocessed surface can be cleaned more easily than Electro Chemical Buffing surface since the latter has undulations, which are observed by a mictoscope having resolution at 500nm scale and are apt to catch particles.
Canisters
Cleaning tank


The material is baked in the oxidizing atmosphere to form two layers, consisting of passivated layers of iron oxide layer on the top and chrome oxide layer under it.

Metal ion does dissolve in alcohol nor in ozone water containing much residual oxygen.
The brand name of this iron oxide layer is GOLDEP.
Pipings
Pure capsules (parts for small deionized water equipment)


Iron oxide layer is removed from the surface, which will be coated by passivated layer of chrome oxide layer.

Metal ion does not dissolve in ultra-pure water nor in organic amine solution.
The brand name of this chrome oxide layer is GOLDEP WHITE.
Cleaning chamber
Vacuum chamber



 

 

  • The dissolving amounts of metal ion, TOC, etc. are extremely small.
  • The processed surface is smooth and does not allow generation of particles.
  • The products offer high heat resistance.
  • The products can be used under high pressure.
  • The products can be easily worked by bending, ferrule connection, welding and so on.
  • Having the same mechanical strength as stainless steel.