I am trying to understand the relative corrosiveness of aqueous ammonia (29%) in a carbon steel pressure vessel. I have found much reading about SCC in welds and HAZ of welds with anhydrous ammonia, but nothing for aqueous ammonia. All this is in an effort to set up and inspection program for the vessel with the correct inspection frequencies for internal, external UT, and visual inspections.
Anything you can offer is very much appreciated.
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