Controlling Corrosion in Amine Treating Plants
نویسندگان
چکیده
The causes and the prevention of carbon steel corrosion in amine systems are reviewed. The corrosive agents are acid gases, oxygen, heat stable salts, amine degradation products, and, in refineries, gas contaminants such as ammonia and hydrogen cyanide. Corrosion mechanisms are provided for carbon steel exposed to amine solutions and for amine regenerator overhead systems containing aqueous condensate. Corrosion is prevented by purification of amines and feed gases, corrosion inhibitors, use of corrosion resistant materials in selected locations, modification of process variables, and use of inhibitors. Different modes of carbon steel cracking in amine service are also discussed along with measures for their mitigation.
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