Normally the cause of erosion corrosion are the following factors;

1. Major factors

(1) High velocity per materials, surface roughness (Including inside weld bead, gauge guide pipe, instrument/corrosion probe), surface hardness/ How much turbulent flow?/ What is the threshold shear stress on the metal surface?
(2) Geometry effect-curvature for piping and baffles in shell & tube type heat exchangers, tray or packing in chemical towers. Particularly the simulation anlalysis (flow dynamics) for flow regime/pattern in pipeline/piping have been highly developed during last 10years. You can obtain the anticipated stress each part from the simulation.
(3) Particle size/amount/hardness
(4) Cavitation in pumps and piping
(5) Phase profile (L, V, L+V, L+S, L+V+S)
(6) Vibration
(7) Metal Contact on Operating
(8) Special situation per facility function
(9) Local corrosion (e.g., pitting, IGC, SCC) or deposit may be created unexpected turbulent flow.

2. Minor Factors

(1) Operating temperature
(2) Pressure drop
(3) Fatigue cycle
(4) General corrosion environment
(5) Other contamination in service
(6) Surge and pulse
(7) Others

** Reference: Why don`t you search the internet. However you may get only some parts of lots of factors. No reference covers full options. We normally make the final remedy as well as root cause analysis after compiling/evaluation of all anticipated options from mechanical design, flow dynamics, corrosion, welding, metallurgy, process, inspection and maintenance data.

Good luck,

Thomas Eun in a severe erosion environment