Atotech recently introduced Tridur® HT, an innovative Cr(VI)-free blue passivate for high corrosion protection.
Suitable for rack and barrel applications, Tridur® HT produces an attractive homogeneous blue finish on acid or alkaline zinc plated surfaces. The process achieves an excellent corrosion protection, from 72 to 96 hours to white rust according to the ISO 9227 Neutral Salt Spray Testing. Both the color and corrosion protection are much more stable than with standard blue passivates - even after heat treatment or humidity test.
Tridur® HT operates at room temperature and therefore allows for consistent energy savings. The remarkable operating lifetime of the solution can be further extended with Tricotect®, Atotech's ion exchange technology for the regeneration of passivates.