This paper describes erosion - corrosion wear model of carbide materials in crude petroleum fluid flow. The wear model is based by elastically or plastically fatigues, when the corrosion fluid has solid particles. The velocities of solid particles are evaluated by the Reynolds equation. Mathematical model for solid particle has been combined with those for crude petroleum corrosion. This has been addressed through the ball valve of crude petroleum extraction pump. The paper describes some new theoretical developments on the above work. The synergic effect of erosion and corrosion rate was observed for carbide and ceramic composites.
