Investigation of Aniline and N,N-Dimethylaniline as Acidic Corrosion Inhibitor: a Structure–Efficiency Relationship Study

Russian Journal of Physical Chemistry B volume 14, pages1007–1013(2020)Cite this article

Abstract

In this study, aniline and N,N-dimethylaniline was evaluated as corrosion inhibitor for the A3 steel in 5% HCl solution, by the way of gravimetric measurements, and the structure-efficiency relationship was studied. With the result under different concentration and temperature, from 303 to 343 K, the inhibition efficiency of the two inhibitors was compared. The adsorption of aniline and N,N-dimethylaniline on the A3 steel is figured out conforming Langmuir type isotherm. From the comparison of the thermodynamic activation parameters (ΔG, ΔH, ΔS and Ea), it reveals that aniline is easier to absorb on the steel, which can be attributed to the stereochemistry of the two compounds.

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Funding

This work was financially supported by the grants from Youth Innovation Team of Shaanxi University, National Science Foundation of China (41202214, 51774184), Shaanxi Key Research and Development Program (2019ZDLGY06-03) And we thank the work of Modern Analysis and Testing Center of Xi`an Shiyou University.

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Affiliations

  1. College of Chemistry and Chemical Engineering, Shaanxi Province Key Laboratory of Environmental Pollution Control and Reservoir Protection Technology of Oilfields, Xi’an Shiyou University, 710065, Xi’an, China

    Shijun Chen, Jiao Lin, Xingang Jia, Shidong Zhu & Gang Chen

  2. School of Chemistry and Chemical Engineering, Yulin University, 719000, Yunlin, China

    Zhifang Zhang & Simin Qu

  3. State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, 102206, Beijing, China

    Shidong Zhu & Gang Chen

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  1. Shijun Chen
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  2. Zhifang Zhang
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  3. Jiao Lin
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  4. Simin Qu
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  5. Xingang Jia
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  7. Gang Chen
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Correspondence to Gang Chen.

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Shijun Chen, Zhang, Z., Lin, J. et al. Investigation of Aniline and N,N-Dimethylaniline as Acidic Corrosion Inhibitor: a Structure–Efficiency Relationship Study. Russ. J. Phys. Chem. B 14, 1007–1013 (2020). https://doi.org/10.1134/S1990793120060172

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Keywords:

  • aniline
  • N,N-dimethylaniline
  • corrosion inhibition
  • thermodynamic activation
  • structure-efficiency relationship