Studies of Corrosion and Corrosion Control in a CO₂−2-Amino-2-methyl-1-propanol (AMP) Environment

Abstract

Corrosion and corrosion inhibition in a sterically hindered amine, 2-amino-2-methyl-1-propanol (AMP), were investigated by static weight loss tests. The corrosion data were compared with those of monoethanolamine (MEA), a conventional alkanolamine, which was simultaneously tested under the same conditions. The results indicated that the AMP system was generally less corrosive to carbon steel than the MEA system, but corrosion control is still necessary. Sodium metavanadate (NaVO3) and sodium sulfite (Na2SO3) were proven to be effective corrosion inhibitors, with more than 90% protection efficiency.

Carbon dioxide absorption characteristics of aqueous amino acid salt solutions

“…unstable carbamate formation (Xu et al, 1996;Sakwattanapong et al, 2005;Sartori and Savage, 1983;Veawab et al, 1997).…”

Review on current advances, future challenges and consideration issues for post-combustion CO2 capture using amine-based absorbents

“…Generally, inorganic inhibitors, composed by various cations (such as sodium and copper) and anions (such as metavanadate, VO − 3 , sulfite, SO 2− 3 and carbonate, CO 2− 3 ), are more popular than those of organic ones, since they can form a passive film to prevent the units from being further corroded [133,134]. Among these inhibitors, the vanadium-containing compounds, especially sodium metavanadate (NaVO 3 ), are the most popular ones for CO 2 capture in MEA-treating plants, since they have less toxicity compared to other compounds such as chromate [135].…”

Characterization of metal corrosion by aqueous amino acid salts for the capture of CO2

“…In addition, the dissolved CO 2 in the form of bicarbonate ions will result in iron dissolution, as shown in reaction 4-4. Therefore, increasing the concentration of bicarbonate ions causes higher rates of iron dissolution and increases the corrosion rate [22].…”

“…The corrosion rate with the potassium taurate solutions is low compared to that with the MEA solutions. Because it has oxygen, nitrogen, and sulfur atoms, the double bond of the potassium taurate solutions provides corrosion inhibition on metal surfaces [22]. Therefore, the molecular structure of the potassium taurate solutions is effective in suppressing corrosion.…”