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Distilled Water in Cooling System - Maybe not. 900

posted by  someone claiming to be Steve on  Wed Feb 12 09:34 CST 2003 [RELATED]

Bob, don't forget that you are adding the water to a chemistry package in the coolant, filled with a variety of tailored ions specifically for corrosion control. This package limits the oxidation of metals and the exchange of ions into the solution. But adding "softened" water (if it is made in an ion exchange process) defeats the purpose of the corrosion package in the coolant.
If one were to use distilled water only in a cooling system, I could buy the argument that the lack of ions might increase solubility of various components and the rate of oxidation of metal. Likewise, your friends in the autoclave business (operating machines using pure water) are probably justified in recommending ionized water.

Makers of antifreezes recommend distilled/deionized water. Knowing that people won't use it, they add certain additives to deal with hard water. But nobody I know recommends using soft water.






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