Factors Affecting Erosion Corrosion

All the factors that influence the resistance of material to erosion corrosion and their exact relationship are difficult to define. One property that factors in is hardness. In general harder materials resist erosion corrosion better, but there are some exceptions. Surface smoothness, fluid velocity, fluid density, angle of impact, and the general corrosion resistance of the material to the environment are other properties that factor in. Equation 9 predicts the erosion rate of metals using some of these factors. However, this prediction is only for erosion and does not include the added effects of corrosion. Erosion in a corrosive environment would be expected to occur at a higher rate.

where,
C is a system constant
ϕ is the angle of impact
ρ is the density of the erodent
ν is the erodent velocity
HV is the hardness of the metal