Passivation

Passivation is a chemical process to protect zinc, zinc-nickel and zinc-iron coatings from white corrosion.

Features:

  • absence of Cr +6, compliant with RoHS (2002/95/EC), ELV (2000/53/EC), 2003/36/EC and 2000/53/EC;
  • process based on trivalent chromium;
  • applied on zamak or materials with zinc, zinc-nickel and zinc-iron coatings;
  • applied by frame and barrel plating;
  • film not sensitive to heat and dehydrated;
  • thinner films (400 – 500 nm) and little crazing;
  • types of passivation: white, white iridescent (yellow +3), tropical trivalent, black, black special, transparent COAT and transparent blue.
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