Plastic Coatings for Corrosion Scale and Paraffin Control in Oil Field Tubular Goods

Corrosion, as we speak of It, may be defined as an eating away of a material and it falls into two general categories: chemical attack, as in the action of an acid or oxygen on a metal, and electrochemical attack in which a chemical change takes place, dependent on the flow of an electrical current. This is also known as galvanic corrosion. Chemical corrosion results when a metal is placed in a reactive environment. This may be controlled by either changing the nature of the environment. This may be controlled by either changing the nature of the environment or insulating the metal from the environment. Usually in oil and gas corrosion we attempt the latter, either by use of inhibitors (chemical coating agents) or by the more permanent plastic coatings. In combating environmental attack, the insulating material must be completely inert to the environment and incapable of being permeated by that environment.