Ultrasonic Cavitation vs. Air in an Ultrasonic Cleaner

Sonic cleaning requires all surfaces to be wetted.
Sonic cleaning requires all surfaces to be wetted.

Ultrasonic cleaning procedures described in our posts nearly always call attention to the importance of degassing fresh cleaning solutions.  Degassing is the process of removing trapped air in liquids.  You can see this by letting a glass of water stand for awhile and note the bubbles that appear on the inside surface.  Trapped, entrained or dissolved, air inhibits cavitation, which is the implosion of micron-size vacuum bubbles that accomplish the cleaning.

Simply operating the equipment for a time, the length of which depends on the volume of cleaning solution, will drive off trapped air. The process can be hastened by a Degas mode on an ultrasonic cleaner. It does the job by switching on and off causing air bubbles to coalesce and allowing them rise to the surface and burst.

Removing Other Air in an Ultrasonic Cleaner

Air can be introduced … Read the rest