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Información tecnológica

versão On-line ISSN 0718-0764

Resumo

APERADOR, Willian; BAUTISTA-RUIZ, Jorge H  e  DELGADO, Arnoldo Emilio. Monitoring Corrosion of Concrete Embedded Steel obtained from Industrial Product Wastes. Inf. tecnol. [online]. 2013, vol.24, n.4, pp.55-66. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642013000400007.

Corrosion of ASTM A 706 structural steel embedded in concrete obtained from by-products as steel slag and fly ash alkali activated was evaluated. Characterization techniques such as open circuit potential, linear polarization resistance and electrochemical impedance spectroscopy in a solution of sodium chloride 3.5% were employed. The steel-concrete interface was characterized by transmission Mössbauer spectroscopy at room temperature and X-ray diffraction. The results obtained by the different characterization techniques were compared with values obtained for Portland cement concrete. The corrosion products identified are magnetite (Fe3O4), wuestite (FeO) and goethite (α-FeOOH).

Palavras-chave : fly ash; slag; electrochemical impedance spectroscopy; X ray diffraction; Mössbauer spectroscopy.

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