Suppose I synthesize polyaniline with, say, enhanced electrical conductivity, by metal ion doping, then how and why should the above polyaniline show better anti-corrosion performance on steel as compared to normal/pure polyaniline?
Hello dear,
Its electrical conductivity increases when polyaniline (PANI) is doped with metal ions like Cu²⁺ or Zn²⁺. This makes it better at transferring electrons, which helps it protect the metal surface (like steel) by forming and maintaining a stable oxide layer. This oxide layer acts like a shield that prevents further rusting.
Also, doping usually makes the PANI structure more compact and less porous. This means water and corrosive ions (like chloride from salt) have a harder time reaching the metal surface underneath.
Read more: Article Recent advances of polyaniline composites in anticorrosive c...
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