Question for a chemist

Patrick_B

TFP Expert
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Jun 7, 2011
14,999
Midland TX
#2
RO water is aggressive because there is very little of anything in it mineral, or buffer wise. Roughly, waters are either scaling or corrosive. If they contain little to nothing, they will dissolve many things they come in contact with. Metal or mineral. Water is always trying to reach equalibrium by dissolving or depositing something. It won't create acid, but some RO water is on the acid side, say 6.0-6.5 depending on how far it is processed.
 

pooldv

Mod Squad
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Aug 10, 2012
24,993
DFW, TX
#5
It is mostly about PH, pH below 7.0 is corrosive to copper and pH above 7.2 is not.
 

Patrick_B

TFP Expert
LifeTime Supporter
Jun 7, 2011
14,999
Midland TX
#6
RO is agressive to most minerals and most metals. Copper is highly suceptible to some things like Chlorine, and like Aluminum it is also susceptible to elevated pH levels.