Ultrasonic Cleaning The advantages of ultrasonic cleaning are: 1) Cavitation bubbles are extremely small and can reach into reach into area that the bristle of a brush could never reach. 2) Ultrasonic cleaning will NOT DAMAGE even the most delicate parts. Parts that would be bent by simply picking them up in one's fingers can be cleaned safely using the gentle yet powerful force of ultrasonic. In general, frequencies above 18,000 cycles per second are considered to be ultrasonic. In ultrasonic cleaning, high amplitude sounds waves are introduce into a liquid cleaning solution. As these sounds waves travel through the liquid, area of alternate positive and the negative pressure are created which correspond to the areas of compression and rarefaction of a sound wave passes a given point. Liquids, however, are not elastic (as can be evidence by hydraulic principles) and are literally torn apart when a strong rarefaction or negative pressure point is created. As the liquid is torn apart a microscopic void is created which is called a cavitation bubble. For all practical purposes, a cavitation bubble is an area of vacuum within the body of a liquid and is therefore very unstable and short-lived. When the bubble collapses or implodes, a phenomenon not unlike that of a thunderclap only on a microscopic scale result. Minute areas go high pressure are created by these 'thunderclaps" which break down the surface boundary layer and enhance chemical cleaning action.

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