Comparison of the corrosion protection of electro-spun and drop-cast polyaniline microfiber coatings on carbon steel

Polyaniline/poly(methylmethacrylate) (PANI/PMMA) microfiber coating were successfully deposited on carbon steel by electro-spinning and drop-cast methods, and their corrosion protection performances were evaluated in H2SO4. The results show the corrosion protection property of coating is outstanding with a certain amount of PANI (25 wt.%), especially for electro-spun coating. The reason of superior corrosion protection function of PANI electro-spun coating was investigated, which is primarily attributed to its better barrier protection, behaved as a lower porosity and enhanced adhesive ability. The outstanding corrosion protection performance of PANI/PMMA microfiber coatings encourages the wider application of electro-spun coatings in the corrosion protection area.