Researchers from China synthesized polyaniline (PANI) microspheres by self-assembly method in poly (2-acrylamido-2-methylpropane sulfonic acid) (PAMPS) aqueous solution and then Ce3+ ions were doped onto PANI hollow microspheres and further blended with Zn particles to prepare polyaniline/zinc/cerium nitrate composites. Prepared composites were used as additives in epoxy resin and dispersed in resin by mechanical grinding. Anticorrosion experiments  revealed that impedance value in low frequency region maintained at 106 Ω·cm2 after 70 days of harsh corrosion in 3.5 wt% NaCl aqueous solution and PANI/Zn/Ce(NO3)3-epoxy coating has excellent anticorrosion properties.

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