000			01609nab a2200193 4500
005			20260608201648.0
008			260224s2009 xxu
245	0	0	_aPassivation Behavior of Carbon Steel in Hydrogen Sulfide-Containing Diethanolamine and Diglycolamine Solutions
260			_a _b _cdic. 2009
270			_a06/07/2010 ; 06/07/2010
300			_a6 p. ; 595-600
520			_aTranscripción 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.
581			_a12
773			_g65
942			_cARTICULO
100	1		_aRaeissi, K. _943518
100	1		_aGolozar, M.A. _943519
999			_c171811 _d171811