Hot black oxide

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chemni usip

The company Chemni Usip s.r.o. was founded in 1996 and the main focus of its activity is surface treatment of metals. This focus is due to the many years of experience of the company owners in this area, and the first introduced surface treatment technology was chemical nickel plating.

Alkaline hot black oxide (hot blackening) shall especially secure visual aspect of a treated part, but also increase corrosion resistance of blackened components in combination with preservative oils. The result is then formation of conversion iron oxide layer.

  • Maximal dimensions of parts (L x W x H): 1500 x 600 x 700 mm up to 500 kg.
  • No dimension change.
  • No harm to polished areas.
  • Corrosion resistance: After impregnation with preservative oil 160 – 180 h – Salt spray test
    to ASTM B-117 /DIN 50021/.