Requires fluid action.
Potentially Occurs in:
Sandblast equipment, pipe elbow, rain on aircraft, pumps, mixing impellers, ultrasonic devices, Oil drilling, pumping, mineral benefication
Solid Particle Impingement is a form of erosion produced by a continuing succession of impacts from solid particles on a surface. The impacting particles are smaller than the solid subjected to the erosion. However, if all the impacts are superimposed on the same spot, the term repeated impact is used.
Fluid impingement is a progressive material removal from a solid surface by the striking action of a fluid. The impinging fluid does not contain particles as would be the case in slurry erosion.
Cavitation erosion is a progressive loss of material from a solid due to the action of bubbles in a liquid collapsing near the surface. When bubbles collapse in a liquid, surrounding bubbles rush in to fill the void. This action can create tiny liquid jets that can cause material removal.
Slurry erosion is a progressive loss of material from the action of a mixture of solid particles in a liquid that is in motion on a solid surface. If the solid surface is capable of corroding in the fluid portion of the slurry, erosion will contain corrosive components.
Fretting, oscillatory movement of small amplitude between two solid surfaces, is usually tangential in nature and is typically unintended motion. It most often occurs between parts that are not supposed to experience relative motion.