Erosion-corrosion encompasses a wide range of flow-induced corrosion processes. Flowing fluids can damage protective films on metals resulting in greatly accelerated corrosion. Damage to the films may be result of mechanical forces or flow-enhanced dissolution and the accelerated corrosion may be accompanied by erosion of the underlying metal. This conjoint action of erosion and corrosion is known as erosion-corrosion [1]. Impingement attack by liquid droplets and solid particles, and cavitation attack are also included here, under this broad definition of erosion-corrosion. In practice, the relative contributions corrosion and erosion, to the total metal loss, vary widely with type of erosion-corrosion and the hydrodynamic intensity of the flow.