01619nab a2200193 4500 20260520000857.0 260224s2009 xxu Passivation Behavior of Carbon Steel in Hydrogen Sulfide-Containing Diethanolamine and Diglycolamine Solutions sep. 2009 07/07/2010 ; 07/07/2010 6 p. ; 595-600 Transcripción del resumen del autor. Corrosion and passive behavior of carbon steel in hydrogen sulfide (H2S)-containing diethanolamine (DEA) and diglycolamine (DGA) solutions were investigated using Tafel polarization and electrochemical impedance spectroscopy (EIS) techniques. Solutions were made using industrial-grade DEA or DGA and sour water. Tafel polarization results showed that passive films are formed in both DEA and DGA solutions. X-ray analysis showed that the passive film formed in DEA solution is troilite (FeS), an iron sulfide with high stoichiometry. Conversely, a non-stoichiometric iron sulfide named mackinawite (FeS1-x) was formed in DGA solution. EIS results showed that the corrosion in the DEA solution is diffusion-controlled and that in DGA solution is charge-transfer-controlled. The corrosion rate of carbon steel in H2S-containing DEA solution was found to be lower than the DGA solution in the same conditions. Obtained results showed that the corrosion rate of steel increases with increased amine (DEA or DGA) concentration. 9 Corrosion 65 ARTICULO Raeissi, K. 43518 Golozar, M.A. 43519 171816 171816 0 0 0 0 239635 BAAB BAAB 2026-03-05 200046691 0 200046691 2026-03-05 15:14:12 2026-03-05 ARTICULO