> Will the anti electrolysis properties still be good as long as the
> anti-freeze properties test good?
David,
This may be more than you want to know, but many people are confused about
automotive coolant.
I have recycled coolant for several years. The main problem with the aging
of coolant is that it picks up metal from the system and becomes
electrically charged. Poor quality coolant causes electrolysis to on the
cooling system and can be very destructive, especially to aluminum.
Besides checking the freeze protection of coolant (50/50
antifreeze/water), a simple voltage check is in order to know when it is
time to change the coolant. Attach the proper meter lead to the ground
side of the battery, negative to negative or positive to positive. Install
the second lead in the coolant, touching the coolant only.
Zero (0) to 0.3 volts is normal in a coolant of a cast iron engine. .5
volts will destroy a cast iron engine with time and engine manufacturers
are reporting .15 volts will damage an aluminum engine with time.
When we recycle, the coolant goes through a centrifuge to separate the oil
and through a filtering system to remove the particulate. The coolant is
adjusted to -34 deg F(50/50 solution) by adding new antifreeze, then an
additive package is added and the PH adjusted to around 10 or a bit above.
Tom, Redding CA - #216 D/FCC
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