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Functionalized Polypyrrole for Mild Steel Corrosion Protection in 15% HCl

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Abstract

Corrosion protection of mild steel (MS) substrate is critical to prolonging the life of service equipment in refineries and chemical industries. In petroleum refineries, drilling and acidizing pipe work with vast amounts of 15% HCl that induce corrosion of MS pipelines. Here, a novel pentadecyl phenol (originated from cashew nut shell liquid)-functionalized conjugated polypyrrole (MPY) was synthesized and demonstrated for MS corrosion inhibition at a 15% HCl environment. Pentadecyl units provide hydrophobicity and form interdigitating layer structures to cover the metal substrate, which leads to better corrosion mitigation. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) studies reveal the superior corrosion inhibition performance of MPY on MS under 15% HCl conditions. The corrosion protection efficiency was determined to be 67.93% over MS substrate in the presence of MPY from PDP studies compared with pure MS.

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Acknowledgements

The authors thank the Analytical Sciences Division of CSIR-IIP for analytical support. Authors Sachin and Nishtha Arora thank UGC for the research fellowship.

Funding

This work was supported by the CSIR-IIP project No. OLP-1183 for the research funding.

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Authors and Affiliations

  1. Polymeric Materials Area, Chemical and Material Sciences Division, CSIR-Indian Institute of Petroleum, Dehradun, 248005, India

    Sachin Dua, Nishtha Arora & T. Senthilkumar

  2. Department of Chemical Science, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India

    Sachin Dua, Nishtha Arora, Rakesh C. Saxena, Sudip K. Ganguly & T. Senthilkumar

  3. Corrosion Area, Chemical and Material Sciences Division, CSIR-Indian Institute of Petroleum, Dehradun, 248005, India

    B. G. Prakashaiah, Rakesh C. Saxena, Sudip K. Ganguly & T. Senthilkumar

Authors
  1. Sachin Dua
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  2. B. G. Prakashaiah
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  3. Nishtha Arora
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  4. Rakesh C. Saxena
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  5. Sudip K. Ganguly
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  6. T. Senthilkumar
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Contributions

TS contributed to conceptualization and supervision; S and TS contributed to methodology; S, NA, BGP, and TS contributed to investigation; S, RCS, and TS contributed to writing and original draft preparation; RCS, BGP, SKG, and TS contributed to writing, reviewing, and editing; and RCS and TS contributed to visualization. All authors have read and agreed to the published version of the manuscript.

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Correspondence to T. Senthilkumar.

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Dua, S., Prakashaiah, B.G., Arora, N. et al. Functionalized Polypyrrole for Mild Steel Corrosion Protection in 15% HCl. Trans Indian Inst Met 77, 1313–1321 (2024). https://doi.org/10.1007/s12666-023-03107-9

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  • DOI: https://doi.org/10.1007/s12666-023-03107-9

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