Aluzinc is a flat steel product which is coated with an aluminium zinc alloy on both sides using a continuous hot dipped process similar to that used in the manufacture of galvanised sheets. The coating which consists of 55% Aluminium, 43.4% Zinc and 1.6% Silicon, enables the steel to resist corrosion through the joint action of the cathodic action of the zinc and the surface screening effect of the aluminium. Aluzinc can be used for pipe cladding in the petrochemical and enclosure industries, as well as other cases which require protection from harsh environments.

Zinc
When subjected to rough weather the zinc in the coating acts like a galvanised coated steel by sacrificial cathodic protection at all points where the bare steel is exposed.

Aluminium
This contributes to corrosion resistance by a screening action in that it is quickly rendered passive by the formation of an insoluble layer of Aluminium Oxide.