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Corrosion resistive conducting polymeric nanocomposite-based coatings on steel: a mechanistic insight

  • Kuntal Sarkar , Rishi Raj , Tapan K. Rout and Suryasarathi Bose EMAIL logo
Published/Copyright: April 15, 2025
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International Polymer Processing
From the journal International Polymer Processing Volume 40 Issue 2

Abstract

Conducting polymers and polymer-based nanocomposites has occupied significant importance in the scientific field as well as engineering research and applications. Among all different applications, conducting polymers as a corrosion resistive coating on steel have developed a lot of research interest and success for the last four decades. This paper provides an extensive review on the corrosion resistive conducting organic polymer coating systems over steel substrates. It mainly discusses different mechanisms of corrosion provided by different conducting polymer coatings over steel. The corrosion resistance mechanisms of coatings based on polyaniline (PANI) and polypyrrole (PPy) and their nanocomposites, which are considered very promising conducting polymers in different fields, are reviewed here. PANI provides corrosion resistance via different mechanisms. PANI in oxidised form can offer effective anodic corrosion resistance to steel surface due to its higher oxidising ability than in reduced form. It can provide a good extent of barrier protection to steel as well. PPy also can provide both the barrier and anodic protection. The mechanism of intelligent release of doped corrosion inhibitive anions from the conducting polymer coating and its contribution to corrosion protection mechanism of steel is also focused in this article. The limitations of conducting polymer coating are briefly discussed.

Keywords: conducting polymers; polyaniline (PANI); polypyrrole (PPy); steel; corrosion mechanisms
Corresponding author: Suryasarathi Bose, Department of Materials Engineering, Indian Institute of Science, Bangalore-560012, India, E-mail:

Acknowledgement

The authors (S.B. and R.R.) would like to acknowledge IISc, Bangalore and Tata steel ltd., Jamshedpur for their support in this work.

  1. Research ethics: Not applicable.

  2. Informed consent: Not applicable.

  3. Author contributions: K.S. and R.R. have contributed in literature survey, data interpretation, analysis and manuscript writing and T.K.R. and S.B. helped in editing, data analysis and designing the frame work of the manuscript.

  4. Use of Large Language Models, AI and Machine Learning Tools: None declared.

  5. Conflict of interest: The authors state no conflict of interest.

  6. Research funding: The funding for this research was provided by IISc Bangalore and Tata steel ltd., Jamshedpur.

  7. Data availability: Not applicable.

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Received: 2024-08-09
Accepted: 2025-01-21
Published Online: 2025-04-15
Published in Print: 2025-05-26

© 2025 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Review Article
  3. Corrosion resistive conducting polymeric nanocomposite-based coatings on steel: a mechanistic insight
  4. Research Articles
  5. Effect of compatibilizer type on the properties of thermoplastic elastomers based on recycled polyethylene at high ground tire rubber content
  6. Analyzing the effects of solid fraction and heat treatment on the mechanical properties of 3D printed polymer lattices
  7. Effect of polyvinyl acetate on the properties of biodegradable thermoplastic starch/polyethylene glycol blends
  8. A color masterbatch assistance system for optimizing product color by masterbatch addition in injection molding of post-industrial recyclates
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  13. Effect of graphene nanoplatelets (GnPs) on low velocity impact properties of hybrid kevlar/basalt fiber reinforced epoxy based composites
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https://doi.org/10.1515/ipp-2024-0101
Keywords for this article
conducting polymers; polyaniline (PANI); polypyrrole (PPy); steel; corrosion mechanisms

Articles in the same Issue

  1. Frontmatter
  2. Review Article
  3. Corrosion resistive conducting polymeric nanocomposite-based coatings on steel: a mechanistic insight
  4. Research Articles
  5. Effect of compatibilizer type on the properties of thermoplastic elastomers based on recycled polyethylene at high ground tire rubber content
  6. Analyzing the effects of solid fraction and heat treatment on the mechanical properties of 3D printed polymer lattices
  7. Effect of polyvinyl acetate on the properties of biodegradable thermoplastic starch/polyethylene glycol blends
  8. A color masterbatch assistance system for optimizing product color by masterbatch addition in injection molding of post-industrial recyclates
  9. Enhancing 3D printing with composite filaments incorporating electronic waste: a study on flexural and compression strength
  10. Development of enhanced co-continuous PVDF/PET nanocomposites via synergistic effects of graphite particle size, hybrid systems, and reduced graphene oxide
  11. Integration of nanographene and action of fiber sequences on functional behaviour of composite laminates
  12. Effect of chain branching on the rheological properties of HDPE/LLDPE and HDPE/LDPE blends under shear and elongational flows and evaluation of die swell and flow instabilities
  13. Effect of graphene nanoplatelets (GnPs) on low velocity impact properties of hybrid kevlar/basalt fiber reinforced epoxy based composites
  14. Sustainability in rotational molding: a study on recycling and the influence of additives
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