01651nab a2200205 4500 20260522181321.0 260224s2010 xxu Amri, J. 45779 Gulbrandsen, E. 40148 Nogueira, R.P. 45780 Propagation and Arrest of Localized Attacks in Carbon Dioxide Corrosion of Carbon Steel in the Presence of Acetic Acid mar. 2010 20/07/2010 ; 20/07/2010 7 p. ; 035001 Transcripción 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. 3 Corrosion 66 ARTICULO ddc 175115 175115 0 0 0 0 242934 BAAB BAAB 2026-03-05 200046997 0 200046997 2026-03-05 18:52:41 2026-03-05 ARTICULO