BARRIER COATINGS AS A MEANS OF CONTROLLING CORROSION

^*1Asikhia, O.K and  ²Ohonba, S.U.

¹Department of mechanical Engineering and ²Department of chemical Engineering,

Edo State Institute of Technology and Management, Usen, Nigeria

 E-mail: askess2002@yahoo.com

ABSTRACT

Corrosion is the gradual physiochemical or alteration of material (usually metals) through the chemical or electrochemical action of its environment. It can be simply defined as the unintentional attack on a metal through the reaction with the environment. This paper shows what corrosion control by barrier coating is, and it highlights the types of barrier coatings namely; metallic and non-metallic coatings. The metallic coating comprises the anodic and the cathodic coating methods of preventing corrosion while the non metallic coating is essentially corrosion control using paints. It also intends to outline the basic characteristics or properties of the different corrosion control methods stated above. The reasons for paint failure and some recommendations for prolonged life and satisfactory performance of the coatings were also reflected.

Keywords: Coating, Anode, Cathode, Paint failure, Barrier coating.