Zinc Patination

The chemical process which results in the formation of the protective film on the surface of zinc has several stages and may take a long time to develop, depending on the season, weather and other factors.

During this transitional phase, the surface appears to be irregular due to light reflection. As patination progresses these reflections will disappear; the greyish blue protective film will become denser and the colour more uniform. Patination can be artificially accelerated and Titanium Zinc can be supplied pre-weathered to prevent any difference in appearance of adjacent panels.

Unwashed areas of zinc and aluminium cladding can show an uneven and patchy surface film when they are in an aggressive environment. Maintenance is required as for other metals. See  Maintenance.