Abstract
This chapter discusses corrosion prevention and control. As the community is becoming aware of the costs of corrosion, it is also becoming aware of the problems associated with many of the standard methods of corrosion prevention and control. Corrosion, its control and prevention is an enormous section of the science of metals; it is served by many disciplines including metallurgy, electrochemistry, physics, and chemical engineering. Metallic corrosion in aqueous environments is an electrochemical process generally consisting of two or more partial reactions, which occur at or near microstructural features on the metal or alloy surface. These features include grain boundaries, intermetallic phases and particles or flaws in naturally occurring protective oxide films. A simple schematic of the process is shown in the chapter. In addition, the corrosion rates of metals and alloys may be measured by a number of techniques. The simplest procedure for determining the corrosion rate is to measure the weight of a metal coupon before and after exposure to a given environment, calculate the loss in weight, and divide by the exposure time and the coupon surface area.
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