An ultrasonic cleaner has several parts. Upon opening the cleaner’s lid, the first part that will be seen is the stainless steel tank. This is where the items that will be cleaned are placed. An ultrasonic cleaner also has transducers. These transducers, which are made of piezoceramic materials, are positioned either at the side or bottom of the tank. The transducers react once they are hit by an electric charge. Their size and shape change due to the energy applied on them. These changes cause the tank to vibrate. The vibrations cause cavitation bubbles to form in the cleaning bath.
Cavitation bubbles are formed when an electric current in the 20 kHz to 50 kHz range is applied on the transducers. Vacuum filled bubbles first start to form in the cleaning solution. Due to continuous exposure to ultrasonic waves, the size of the bubbles increases. When the bubbles cannot take the size change anymore, they implode. These implosions are violent and they cause the temperature inside the tank to increase. Millions of cavitation implosions happen during ultrasonic cleaning.
How Cavitation Bubbles Remove Contaminants
The violent implosions of cavitation bubbles remove the contaminants from the objects in the ultrasonic cleaner’s tank. Although the bubbles are small, their implosions are extremely powerful.
How to Make Ultrasonic Cleaning More Effective
To make ultrasonic cleaning even more effective, use an ultrasonic cleaning solution. Water can remove contaminants, but ultrasonic cleaning solutions remove contaminants faster and more effectively. Increasing the operating temperature is also good for ultrasonic cleaning. This degasses the cleaning bath.