|
|
Actually, the "foil test" is a standard technique used to map the position and magnitude of the ultrasonic energy within a tank. Several strips are hung into the liquid and where the ultrasonic energy is at it's highest, that strip (or strips) of foil will be either pitted or have holes punched through it dependant upon the energy of thickness of the foil. It has nothing to do with the liquid (although a liquid designed specifically for ultrasoniic tanks will perform better).
The reason for not using standard "washing up" liquid is that they contain ammonia salts and can discolour the aluminium if left in long enough and as a worst case can damage the surface of the component being cleaned.
|
|
|