8 - Erosion and abrasion corrosion

Abstract

This chapter talks about the erosion corrosion. Flow corrosion is a type of metal damage that can occur when a flowing liquid gets exposed to a metal. It can be caused by various factors such as flow velocity and mass transport. There are four different types of flow-induced corrosion. These include mass transport-controlled, phase transport-controlled, erosion–corrosion, and cavitation–corrosion. Erosion–corrosion is a type of metal damage that is caused by the combined effects of corrosion and erosion. The other types of damage caused by flow corrosion include the erosion of protective films on a surface due to the presence of a liquid or a solid particle in a turbulent environment. If the flow of a liquid over a surface causes mass transfer and increased turbulence, then this type of corrosion is referred to as flow induced. The continuous damage to the protective film can be triggered by the mechanical action of the environment, which can lead to the oxidation of bare areas. This process can also be triggered by the actions of the surrounding passive areas. The chapter continues by addressing the factors that influence propensity, evaluation techniques, and most importantly, prevention techniques of erosion corrosion.