Quote:
Originally Posted by mannys9130
Mxfrank IS correct.
Distilled/RO water is very pure. Like, VERY pure. It tends to pull minerals out more readily than tap water (already loaded with minerals). Water is a very good polar solvent. It's not corrosive like Sodium Hydroxide, but it is corrosive in the literal sense of the word.
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Engineer here. This is indeed true. I'd like to add pure water is indeed less corrosive than water with impurities; however the effect is still measurable and it can actually attack nearly anything; especially at high temps and pressures. I like to think of it as having an abrasive force rather than an corrosive force, causing the water to retain impurities as a result of this. So using distilled water has no major advantage.