The PDF for Dominator had some good info.
Quote:
10.
Question:
How does Dominator® Coolant Boost prevent electrolysis and galvanic corrosion?
Answer:
Galvanic corrosion occurs when antifreeze acts as an electrolyte between dissimilar metals in cooling systems. Dominator® Coolant Boost contains a premium ingredient called molybdate, which forms a film on the surface of aluminum, controlling the transfer of electrons. This film helps minimize the tendency for electrolysis and galvanic corrosion.
It mentions molybdate as an inhibitor. That is an IAT and suggests the inhibitors might not be OAT. But molybdate alone probably wouldn't be effective, so it probably has other inhibitors. It could be phosphate, molybate and borate or potassium hydoxide, like some SCAs. Or it could be molybdate, an OAT and K hydoxide.
One thing I found strange was that they recommended using soften water, but other sources say the salts used for soften water are not to be used in cooling systems.
I reread the soften water recommendation and it appears they are referring to when used with straight water only and not with anti-freeze. I'm not sure if I agree with soften water ever being recommended over distilled water, but maybe this only applies when antifreeze is not used.
Quote:
17.
Question:
What are the AMSOIL recommendations when using straight water coolant?
Answer:
When using straight water as a coolant, the most robust form is softened water because the softening process removes impurities and minerals from the water by exchanging them for more beneficial minerals. Unlike distilled water, softened water will not act as an electrolyte, thereby minimizing damage from electrolysis. Although softened water is preferred, Dominator® Coolant Boost contains an advanced formula that allows use of low quality water (i.e. well water in cooling systems without concern of damage or scale/deposit buildup.) Distilled water is not recommended in straight water systems.
