PROPERTIES:
Universal process for zinc and zinc alloys
For highest quality requirements concerning heat resistance and corrosion protection
Usage without waste water is possible
Highest cost-effectiveness when using the SurTec regeneration process
SurTec 680 LC is the industry standard for thick layer passivation
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
Long service life,even with feed-back of rinsing water
Layer fulfils all requirements of ELV, RoHS and WEEE if following the recommended process sequence (see “application”)

Application:
Surtec 680 can be used for rack or barrel application. The process includesthe following products:
Surtec 680 Chromiting Concentrate contains chromium(Ill), cobalt and the complexing agent in the correct relations.
Surtec 680 KCT Corrector for Zn-precipitation is added in caseof increasing zinc contents in the bath to complex the excessive zinc.
Surtec 680 C Cobalt Solution is a cobalt containing additivewhich is only added for maintenance, according to analyses.