Collapsing voids that implode near to a metal surface cause cyclic stress through repeated implosion. Cavitation is a significant cause of wear in some engineering contexts. These shock waves are strong when they are very close to the imploded bubble, but rapidly weaken as they propagate away from the implosion. When subjected to higher pressure, these cavities, called "bubbles" or "voids", collapse and can generate shock waves that may damage machinery. Bronze propeller on river barge with an anti-cavitation plate above the prop.Ĭavitation is a phenomenon in which the static pressure of a liquid reduces to below the liquid's vapour pressure, leading to the formation of small vapor-filled cavities in the liquid.
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