A mechanistic approach is taken in a discussion of the control of flow-induced corrosion. An historical survey demonstrates the close interaction of theory and practice. There are a number of mechanisms of the conjoint action of flow and corrosion that result in four types of flow-induced corrosion : (1) mass transport controlled corrosion; (2) phase transport controlled corrosion; (3) erosion corrosion and (4) cavitation corrosion. Prevention strategies are dependent on the type of mechanism concerned. A knowledge of hydromechanical conditions is a prerequisite for the proper design of equipment and a few basic rules have to be followed. In the field of materials selection there is an increasing trend towards choosing passivating materials. If the mechanical stability dominates, materials, such as cast alloys and duplex steels, are applied, especially in particle-containing liquids. Other protection methods, such as metallic, organic and ceramic coatings, inhibition and electrochemical protection, are discussed and it is shown that a number of highly interesting problems still await a solution.