The phenomenon of erosion–corrosion has been studied extensively by various investigators but no accurate<br/>model has been developed to predict the interactions between erosion and corrosion. This is mainly<br/>attributed to the complexity of the interactions that generate either a synergistic or antagonistic wear<br/>effect for a particular material in a certain environment. A semi-empirical model has recently been developed<br/>at theUniversity of Southampton which incorporates dynamic Hertzian contact mechanics to model<br/>the damage during particle impact and accommodates the effect of erodent deforming the surface leading<br/>to an increased corrosion activity. The model was found to have good agreement with erosion–corrosion<br/>rates of carbon steel. The aim of this paper is to evaluate the robustness of this semi-empirical model by<br/>testing it on a passive metal. UNS S31603 was chosen due to its inherent passivity to corrosion. A slurry<br/>pot erosion tester was used as the test rig to perform the experiments. It was found that this passive<br/>metal produces high synergistic levels when exposed to erosion–corrosion in 0.3MHCl with variation in<br/>erodent concentrations and flow velocities. SEM and surface profilometry show typical ductile material<br/>behaviour with cutting mechanism and deformation mechanism occurring simultaneously. A wear map<br/>is presented and it is observed that the increase in velocity and sand concentration causes the material to<br/>shift from a corrosion–erosion dominated region to an erosion–corrosion dominated region. This paper<br/>will also evaluate the semi-empirical model and discuss its applicability in predicting erosion–corrosion
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