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Corrosion Inhibition of Sodium Silicate with Nanosilica as Coating in Pre-Corroded Steel

Auteur(s):







Médium: article de revue
Langue(s): anglais
Publié dans: Civil Engineering Journal, , n. 11, v. 7
Page(s): 1806-1816
DOI: 10.28991/cej-2021-03091761
Abstrait:

This study was conducted to investigate the potential of using sodium silicate with nanosilica as a treatment to inhibit the progress of corrosion in steel specimens that are already corroded. Steel specimens measuring 16 mm in diameter and 4 mm in thickness were prepared and subjected to pre-corrosion by immersion to 3.5% NaCl solution. Two sets of specimens were then dip-coated with sodium silicate containing nanosilica. One set was coated with 1% nanosilica, and the other was coated with 2.5% nanosilica. The coated specimens were then subjected to Complex Impedance Spectroscopy (CIS) at 20 Hz to 20 MHz frequency range. Compared with the sodium silicate coating with 1% nanosilica, the sodium silicate coating with 2.5% nanosilica had a larger semi-circle curve in the Nyquist plot. Similarly, the sodium silicate coating with 2.5% nanosilica also showed larger magnitudes of impedance at the low-frequency region and larger phase angles at the high-frequency regions in the Bode plot. These results imply that the sodium silicate coating with 2.5% nanosilica coating demonstrated better capacitive behavior. In addition, equivalent circuit modelling results also showed that the sodium silicate coating with 2.5% nanosilica had higher coating resistance and lower coating capacitance as compared to the sodium silicate coating with 1% nanosilica. 

Copyright: © 2021 Marish S. Madlangbayan, Carlo Nico B. Diola, Alvin Karlo G. Tapia, Milagros M. Peralta, Engelbert K. Peralta, Ronaniel A. Almeda, Maris Asuncion L. Bayhon, Marloe B. Sundo
License:

Cette oeuvre a été publiée sous la license Creative Commons Attribution 4.0 (CC-BY 4.0). Il est autorisé de partager et adapter l'oeuvre tant que l'auteur est crédité et la license est indiquée (avec le lien ci-dessus). Vous devez aussi indiquer si des changements on été fait vis-à-vis de l'original.

  • Informations
    sur cette fiche
  • Reference-ID
    10641223
  • Publié(e) le:
    29.11.2021
  • Modifié(e) le:
    02.12.2021
 
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