Zinc-based alloy, its use as a sacrificial anode, a sacrificial anode, and a method for cathodic protection of corrosion-threatened constructions in aggressive environment

摘要

A cadmium-free, zinc-based alloy suitable as a sacrificial anode substantially consists of 0.1-1.0 per cent by weight of aluminum, 0.005-1.0 per cent by weight of tin, 0-0.5 per cent by weight of indium, max. 0.0030 per cent by weight of lead, iron and/or copper, and max. 0.0050 per cent by weight of lead, iron and/or copper as well as other metals, in particular nickel, thallium and cadmium, and balance zinc having a purity of about 99.995 per cent. The alloy shows advantageous properties with respect to potential, capacity and effectivity and can with good results be used for cathodic protection of corrosion-threatened constructions in aggressive environment, in particular offshore constructions, hulls, tanks, cooling containers, pipes and the like.