refrigerant electrolysis

Hello friends, due to several problems that I have encountered with rust and water pump breaks in different vehicle models, I have verified that electrolysis of the coolant occurs, especially if it is not of very good quality, in similar cases that may arise, I recommend checking the fluid as follows, with a digital voltmeter connect the positive pole to the radiator and the negative to the coolant, 0.2 volts is acceptable, 0.3 to 0.6 volts is the dividing line, 0.7 v or more, flush the system well and change the coolant, I hope it is useful to everyone, greetings to the entire forum.

JAL thanks for sharing the information, I'll test it and let you know. Greetings from Cancun.