Why does water not conduct current when it is in direct contact with the electrodes and conductors of the resistance welder?

This question has been answered already in another article in this blog:

IF COOLING WATER IS GROUNDED TO THE MACHINE AND PLANT WHY DOES CURRENT CONTINUE TO FLOW THROUGH THE ELECTRODES IN AC AND DC RESISTANCE WELDING

That article stated that the normal low voltage of 4-6 volts cannot overcome the resistivity of the water. Since the resistivity of the copper conductors is very low. The current flows preferentially (thousands of amperes) through the conductors and electrodes and a negligible amount flows through the water.

This assumes that the water is maintained properly as specified by:

AWS STANDARD J1.2 “GUIDE TO INSTALLATION AND MAINTANANCE OF RESISTANCE WELDING MACHINES”

Reference: AWS J1.2M:2016
                  Resistance Welding Manual, 4th Edition