Construction of Erosion-Corrosion Maps for Pure Metals in Aqueous Slurries B. D. Jana and M. M. Stack Department of Mechanical Engineering, University of Strathclyde Objectives: Developing mathematical equation for erosion- corrosion problem Developing a performance relationship between all the variables and parameters of erosion- corrosion in aqueous slurries in a map form Easy way of representing such graphs Erosion Corrosion Phenomena Substrate Corrosion film Particle Available Erosion Models at Normal Impact Sundararajan and Shewmon: Hutchings: Available Corrosion Models Activation controlled kinetics (-Butler Volmer Equation) Passivation controlled kinetics (-repassivation rate due to particle impact) Erosion-corrosion Work combine wastage due to aqueous corrosion and mechanical erosion process the total wastage can be significantly higher than the sum of the two processes Erosion-corrosion Rate K E is the synergistic effect and refer to the influence of corrosion on the erosion rate K C is the additive effect, and refers to the erosion enhancement of the corrosion rate. Active Region For simplification, we neglect the additive effect and synergistic effect. So K C and K E is zero Passive Region In the passive region K CO is neglected, only additive effect is considered K C and K E Determination in the Active Region K C and K E Determination in the Passive Region Regime Map Boundaries Erosion dominated K C /K E 0.1 Erosion corrosion 0.1 K C /K E 1 corrosion erosion 1 K C /K E 10 corrosion dominated K C /K E 10 Construction Methodology: Fe at Ph-7 Pourbaix Diagram for All the Metals. Fe Ni Cu Al Maps of All the Metals for Ph 7 Fe Ni CuAl Wastage Map Boundary LOW K E-C 1 MEDIUM 1 K E-C 10 HIGH K E-C 10 Wastage Map for All the Metals for Ph 7 Al Ni Fe Cu Comparison of Low Wastage of All the Metals-ph 7 Conclusions There is a significant difference between the regime and wastage map for all the metals. The variation above is attributed to the differences in tribo-corrosion behaviour. Al suffers high erosion corrosion due its less hardness than the other metals Due to its high immunity, Cu suffers less erosion- corrosion than the other materials, under the conditions modelled. Thank You