000			01717nab a2200205 4500
005			20260520000914.0
008			260224s2011 xxu
245	0	0	_aCombined effect of carbon dioxide, hydrogen sulfide, and acetic acid on bottom-of-the-line corrosion
260			_a _b _cene. 2011
270			_a19/01/2011 ; 19/01/2011
300			_a16 p. ; 015004
520			_aTranscripción del resumen del autor. This research work presents a study of the combined influence of the partial pressure of hydrogen sulfide (H2S) and the concentration of free acetic acid (CH3COOH) on the general and localized carbon dioxide (CO2) corrosion at the bottom of the line. Experiments were carried out for up to 21 days in three 4-in (101.6-mm) internal diameter flow loops at 70°C with 2 bars of CO2. The flow regime was stratified for all of the experiments. It was found that trace amounts of H2S (from 0.004 bar to 0.13 bar) greatly retards the CO2 corrosion with general corrosion rates usually 10 to 100 times lower than their pure CO2 equivalent. However, the most protective conditions were observed at the lowest partial pressure of H2S, while corrosion increased when more H2S was added. The presence of a mackinawite film on the coupon surface seems to be the origin of this protectiveness. When 1,000 ppm of free acetic acid was added to the system, the general corrosion rate doubled compared with a baseline CO2 environment and by between one and two orders of magnitude compared to baseline H2S/CO2 mixtures.
581			_a1
773	0		_tCorrosion _g67
942			_cARTICULO
100	1		_aSinger, M. _944184
100	1		_aBrown, B. _944179
100	1		_aCamacho, A. _93345
999			_c172747 _d172747