possible measure age via ph?

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New zerex (g05,asian) coolants have ph of 8. If it changes up or down, could that show when2 change?
 
pH is just a logarithmic valuation of protons in a material. The concentration of the H+ will indeed change as the chemistry changes or degrades for both the coolant additives and the metals in the system.
 
8 sounds too low for corrosion inhibition. A higher pH is better, to a point. Too high of a pH can be caustic.
 
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