Glycol and amine systems are widely used in both refineries and gas processing plants for the
removal of contaminants such as water, hydrogen sulfide and carbon dioxide. Since the
majority of the piping and vessels in these plants are fabricated from carbon steel and the
amines are in aqueous solution, there is a high potential for corrosion. This paper provides a
brief overview of some of the major corrosion mechanisms and susceptible locations. In
addition two case histories, one from a TEG dehydration system, and the other from an ADIP
plant are also discussed. These case histories demonstrate the diverse nature of the causes
of corrosion in amine plants and the differing approaches that have to be taken to mitigate
corrosion in gas treating equipment.