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Which is more corrosive to concrete--air or water?

Question asked by Jen Dante on Feb 12, 2014
Latest reply on Feb 19, 2014 by Joseph Clark

My company is based in California, which is experiencing a terrible drought right now.  We have a bunch of outdoor fountains, but facilities is concerned about turning them off because of possible damage to the concrete basin.  Is this a valid concern?  I would have thought water was more corrosive than air.