Buddhadev Jana

Models and mechanisms of erosion-corrosion in metals

Abstract: In studies of the interactions of erosion and corrosion, there are many variables which may affect the wastage rate, i.e. relating to properties of the impacting particles, the target and the environment. In this chapter, an overview is presented of models of solid particle erosion for metallic materials, metals and composites. Combining erosion models with those for corrosion may provide tools for prediction of lifetimes and for describing the regime of erosion-corrosion, depending on the ratios of the mechanical to chemical degradation, in active and passive corrosion environments. Mapping approaches for erosion-corrosion are presented in both two and three dimensions, indicating how such interactions can be presented in a multi-dimensional space.

A CFD model of erosion-corrosion of Fe at elevated temperatures in aqueous environments

In studies of erosion-corrosion at materials at elevated temperatures, there have been many attempts to model the process. Such models have comprised quasi-static and simulation models. However in many environments, erosion-corrosion occurs in aqueous conditions and can be considerably affected by flowing gases in dry conditions. In such cases, any accurate models of erosion-corrosion must include an algorithm due to flow in addition to the mechanics and chemistry of the tribo-corrosion interactions. In this paper, a CFD model is generated of the tribo-chemical interaction at elevated temperatures. The initial work has concentrated on modeling temperature effects in wet conditions; however, the potential application of the model to dry conditions is also outlined. The results are discussed in relation to existing erosion-corrosion models in the literature at elevated temperatures.