Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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Embargo Nature of CuO-PANI Composite Against Corrosion of Mild Steel in Low pH Medium

  • Selvaraj, P. Kamatchi (P.G and Research Dept. of Chemistry, Govt. Arts College for Men (Aut)) ;
  • Sivakumar, S. (Manonmaniam Sundarnar University) ;
  • Selvaraj, S. (P.G and Research Dept. of Chemistry, Govt. Arts College for Men (Aut))
  • Received : 2018.05.30
  • Accepted : 2018.10.29
  • Published : 2019.06.30
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Abstract

Incorporation of CuO nanoparticles during the polymerization of aniline in the presence of ammonium peroxydisulphate as an oxidizing agent and sodium salt of dodecylbenzene sulphonic acid as dopant as well as surfactant yielded water soluble CuO-PANI composite. Comparison of recorded spectra like FTIR, XRD and SEM with reported one confirm the formation of the composite. Analysis by gravimetric method exposes that the synthesized composite is having resistivity against corrosion, with slight variation in efficiency on extending the time duration up to eight hours in strong acidic condition. OCP measurement, potentiodynamic polarization and EIS studies also confirms the suppression ability of composite against corrosion. Riskless working environment could be provided by the synthesized composite during industrial cleaning process.

Keywords

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Fig. 2. XRD spectra of (a) PANI (b) CuO-PANI.

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Fig. 3. SEM of (a) image of CuO (b) CuO-PANI composite.

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Fig. 4.Change in efficiency of CuO-PANI composite with concentration and time in 1 M H2SO4

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Fig. 5. Change in efficiency of CuO-PANI composite with concentration and time in 2 M H2SO4.

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Fig. 6. OCP plot for mild steel in 1 M H2SO4.

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Fig. 7. OCP plot for mild steel in 2 M H2SO4.

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Fig. 8. Tafel plots of mild steel in 1M blank and test solutions.

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Fig. 9. Tafel plots of mild steel in 2M blank and test solutions.

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Fig. 10. Nyquist plot for mild steel in 1M blank and test solution.

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Fig. 11. Nyquist plot for mild steel in 2M blank and test solution.

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Fig. 1. (a) FTIR Spectrum of CuO (b) FTIR Spectrum of PANI (c) FTIR Spectrum of PANI-CuO

Table 1. Inhibition efficiency and surface coverage values obtained from the weight loss measurement in 1M blank and test solutions.

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Table 2. Inhibition efficiency and surface coverage values obtained from the weight loss measurement in 2M blank and test solutions.

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Table 3. Potentiodynamic Polarization Parameters of mild steel in 1M blank and test solution

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Table 4. Potentiodynamic Polarization Parameters of Mild Steel in 2M blank and test solution

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Table 5. EIS parameters for Mild Steel in 1M blank and test solution

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Table 6. EIS parameters for Mild Steel in 2M blank and test solution

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