Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Inhibitory Effect of Benzoate-intercalated Hydrotalcite with Ce3+-loaded clay on Carbon Steel

  • Thuy Duong Nguyen (Institute for Tropical Technology, Vietnam Academy of Science and Technology) ;
  • Thu Thuy Pham (Institute for Tropical Technology, Vietnam Academy of Science and Technology) ;
  • Anh Son Nguyen (Institute for Tropical Technology, Vietnam Academy of Science and Technology) ;
  • Ke Oanh Vu (Institute for Tropical Technology, Vietnam Academy of Science and Technology) ;
  • Gia Vu Pham (Institute for Tropical Technology, Vietnam Academy of Science and Technology) ;
  • To Thi Xuan Hang (Institute for Tropical Technology, Vietnam Academy of Science and Technology)
  • Received : 2022.08.04
  • Accepted : 2022.10.17
  • Published : 2023.03.02
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Abstract

This work studied the inhibitory effect of the combination of benzoate-intercalated hydrotalcite (HT-BZ) and Ce3+-loaded clay (Clay-Ce) on carbon steel (CS). HT-BZ was prepared by the co-precipitation method and Clay-Ce was fabricated by a cation exchange reaction. HT-BZ and Clay-Ce were assessed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) coupled with zeta potential measurement. Electrochemical measurements coupled with scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDX) were used for studying the inhibitory action of the mixture of HT-BZ and Clay-Ce on steel electrodes immersed in 0.1 M NaCl. For comparison, the inhibitory effect of HT-BZ or Clay-Ce alone was also evaluated. The results showed that HT-BZ combined with Clay-Ce provided synergistic inhibition of the CS substrate. The mixture of 0.5 g/L HT-BZ + 0.5 g/L Clay-Ce provided 93.5% inhibition efficiency. The protective mechanism of the HT-BZ + Clay-Ce mixture consisted of the reaction of released BZ and Ce3+ and the deposition of HT-BZ and Clay-Ce structures on the CS substrate.

Keywords

Acknowledgement

The authors gratefully acknowledge the financial support of the Vietnam Academy of Science and Technology under the project number NCVCC 13.05/21-21 for senior researchers and the project number TDVLTT.04/21-23.

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