Effect of silicate-based films on the corrosion behavior of the API 5L X80 pipeline steel
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2018
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Corrosion Science
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The 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.
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OLIVEIRA, 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. Corrosion Science, v. 139, p. 21-34, 2018. DOI: 10.1016/j.corsci.2018.04.035. Disponível em: http://repositorio.ipen.br/handle/123456789/28979. Acesso em: 14 Mar 2025.
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