Hydrogen evolution, cavitation

Chlorine and hydrogen evolution are observed at the anode and cathode, respectively chlorine causes, not unexpectedly, some bleaching of the local tissue whereas hydrogen produced local cavitation (cf. mechanical damage). 

As regards the mechanism of ECT, the passage of current through the tumor gives hydrogen evolution at the cathode causing cavitation (and hypoxia) of the tissue and chlorine... 

The efficiency of ultrasonic degassing in a melt flow corresponds to the completeness of the processes of cavitation nucleation, growth and evolution of hydrogen bubbles. So with increasing flow of a melt through an ultrasonic setup, the increase in a number of working ultrasonic sources and in the duration of the residence time of the melt in the cavitation region are required. 

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