000			01651nab a2200205 4500
005			20260522181321.0
008			260224s2010 xxu
100	1		_aAmri, J. _945779
100	1		_aGulbrandsen, E. _940148
100	1		_aNogueira, R.P. _945780
245	0	0	_aPropagation and Arrest of Localized Attacks in Carbon Dioxide Corrosion of Carbon Steel in the Presence of Acetic Acid
260			_cmar. 2010
270			_a20/07/2010 ; 20/07/2010
300			_a7 p. ; 035001
520			_aTranscripción del resumen del autor. The presence of acetic acid (HAc) has been identified as one factor that may contribute to enhance localized top-of-the-line corrosion attacks in gas condensate pipelines. The role of free HAc on the growth of localized attacks in carbon dioxide (CO2) corrosion of carbon steel pipelines therefore was studied by means of a preinitiated localized attack electrode assembly ("artificial pit electrode"). The current flowing between the localized attack and the outer surface was measured with a zero-resistance ammeter. It is shown that the corrosion potential increases with increasing free HAc concentration. Depletion of free HAc inside the attack imposed a potential difference that triggered the propagation of the attack at room temperature. The pit growth was self-sustained in CO2 and HAc environments only to a certain depth, beyond which the dissolution current at the bottom of the attack vanished. This is in good agreement with field observations in the case of top-of-the-line corrosion phenomena.
581			_a3
773	0		_tCorrosion _g66
942			_cARTICULO _2ddc
999			_c175115 _d175115