OLIVEIRA, LEANDRO A. deCORREA, OLANDIR V.SANTOS, DEMETRIO J. dosPAEZ, ALEJANDRO A.Z.OLIVEIRA, MARA C.L. deANTUNES, RENATO A.2018-07-192018-07-192018OLIVEIRA, LEANDRO A. de; CORREA, OLANDIR V.; SANTOS, DEMETRIO J. dos; PAEZ, ALEJANDRO A.Z.; OLIVEIRA, MARA C.L. de; ANTUNES, RENATO A. Effect of silicate-based films on the corrosion behavior of the API 5L X80 pipeline steel. <b>Corrosion Science</b>, v. 139, p. 21-34, 2018. DOI: <a href="https://dx.doi.org/10.1016/j.corsci.2018.04.035">10.1016/j.corsci.2018.04.035</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/28979.0010-938Xhttp://repositorio.ipen.br/handle/123456789/28979The aim of this work was to investigate the effect of silicate-based films on the corrosion resistance of the API 5L X80 steel in carbonate-bicarbonate solution at room temperature. The films were electrochemically obtained by anodic and cathodic treatments and by immersion in 1.0 M sodium metasilicate solution. The corrosion behavior was evaluated using electrochemical impedance spectroscopy and potentiodynamic polarization. Film morphology was examined by scanning electron microscopy. Adhesion strength was measured by pull-off tests. The chemical composition was evaluated by X-ray photoelectron spectroscopy. The anodic film yielded the best corrosion resistance (protection efficiency 83%). The protection mechanism is discussed.21-34openAccesscarbonatesconcentration ratiocorrosion resistanceelectrochemistryfilmspipelinesscanning electron microscopysilicasodium silicatessteelsx-ray photoelectron spectroscopyArtigo de periódico13910.1016/j.corsci.2018.04.03591.2592.30