By this passivation process based on Trivalent Chromium you can get an iridescent-coloured layer. Its protective capacity, also tested by the standard ASTM, UNI-ISO proved an average resistance beyond 120 hrs. before any occurrence of white corrosion outbreaks.
The thickness of the zinc layer which has deposited on the surface can vary according to requirements. Our standard layer ranges between 8 and 12 microns.