SurTec 680 LC Chromiting – Low in Cobalt Thick Layer Passivation for Zinc and Zinc Alloys


  • Liquid concentrate, based on chromium(III)
  • Exceeds the requirements for yellow chromates according to DIN 50 021 SS
  • Produces coatings of a clear, green, slightly iridescent colour
  • The passivation layer can also be dyed with organic colourings
  • Long service life, even with feed-back of rinsing water
  • Contains only about 1 g/l cobalt in the bath
  • Layer fulfils all requirements of ELV, RoHS and WEEE when following the recommended process sequence (see "application")

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