GAS CONDITIONING GAP CORROSION INHIBITOR

摘要

Crevice corrosion in gas processing equipment using aqueous alkanolamine solutions to remove acid gases is inhibited by adding to and maintaining in the alkanolamine solution crevice corrosion-inhibiting amounts of nickel ions and thiocyanate ions. In carbon steel equipment at least 100 ppm nickel ions and at least 150 ppm thiocyanate ions are used but in stainless steel equipment the nickel ion concentration can be reduced to 25 ppm.