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Updated: Jun 27, 2026

Metal Corrosion and the Efficiency of Corrosion Inhibitors in Less Conductive Media
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Published on: November 3, 2018

Dual-Functional PA-CDs: A High-Performance Material for Metal Corrosion Monitoring and Corrosion Inhibition.

Xiufen Liao1, Zhilin Gong2, Zhengu Chen1

  • 1Institute of Marine Corrosion Protection, Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning 530007, China.

Materials (Basel, Switzerland)
|June 26, 2026
PubMed
Summary

Phytic acid carbon dots (PA-CDs) offer dual corrosion monitoring and inhibition. These nanomaterials change color with pH, enabling visual detection and providing excellent protection for steel, reducing economic losses.

Keywords:
RGB sensorcorrosion inhibitioncorrosion monitoringphytic acid carbon dots

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing dual-function materials for corrosion monitoring and inhibition is vital for economic reasons.
  • Environmental concerns necessitate eco-friendly solutions for material protection.

Purpose of the Study:

  • To prepare dual-function phytic acid carbon dots (PA-CDs) for corrosion monitoring and inhibition.
  • To develop a visual sensor for detecting pH changes during metal corrosion.
  • To evaluate the corrosion inhibition efficiency of PA-CDs on Q235 steel.

Main Methods:

  • Hydrothermal synthesis of phytic acid carbon dots (PA-CDs).
  • Fabrication of a visible RGB-based colorimetric sensor using PA-CDs coatings.
  • Corrosion inhibition tests on Q235 steel in hydrochloric acid solutions.

Main Results:

  • PA-CDs showed a distinct color change in response to OH- and H+ ions, enabling visual pH sensing.
  • A PA-CDs-based sensor effectively detected OH-/H+ during metal corrosion.
  • PA-CDs exhibited excellent corrosion inhibition efficiency of 96.40% for Q235 steel.

Conclusions:

  • PA-CDs possess dual functionality for effective corrosion monitoring and inhibition.
  • The developed colorimetric sensor offers a simple and visual method for corrosion detection.
  • PA-CDs show significant potential for practical applications in preventing material degradation.