Corrosion Protection by Metallic Coatings and Its Practical Use

Abstract

Metallic coatings are widely used in practice as an effective meams for the corrosion control of metallic materials. For the iron and steel structures used in natural environments such as the air atmosphere, fresh water, sea water and soil, zinc and aluminium coatings are applied. These metallizations are carried out by hot dipping and thermal spraying. On the other hand, for the high temperature oxidation and/or corrosion environments are frequently applied the simple chromium or aluminium or the alloy coating with these metals by means of hot dipping, diffusion coatings, thermal spraying and physical vapor deposition. This paper described about the different metallic coating methods, characteristics of coatings, their mechanisms for corrosion protection and applications.