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Corrosiveness of condensate & RO water

Hi Guys

I just wanted to know are condensate & RO corrosive in nature? Since both water are relatively pure , they may have tendency to leach metals from contact surface- Is my argument right? am I missing something?

T Aswin
employee - India
September 29, 2010

You are correct that RO permeate and condensate are corrosive, in general, but not highly corrosive. The cause in both cases is dissolved carbon dioxide. Both are very dilute solutions of carbonic acid. In large boilers, neutralizing amines are added to the feed water that volatilize and condense with the steam to neutralize the CO2 that is absorbed.

Lyle Kirman
consultant - Cleveland Heights, Ohio
October 4, 2010

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