Zinc-rich epoxy primers based on lamellar zinc dust

摘要

Once the electrochemical nature of most of , the corrosion processes because well-established, techonology is enabling the formulation, of new coatings to impede the devolpment of tlhe corrosion reactions invo!ved and also to isolate the metallic surface by applying films of low perrneability. Considering the concept of a sacrificial anode (cathodic protection), prirners were deveioped employing dispersions of high concentration of zic dust in organic or inorganic vehicles. In the film of zinc-rich primers, the particles os pigment are in close contact with each other and with the substrate to be protected.