Published March 2019
Influence of electrically conductive polymer coatings on steel corrosion
R.M. HasanzadehThe paper studies the influence of one-layer polypyrrole (PPY) and polyaniline (PANI) coatings formed on steel surface via electropolymerization in solution consisting of 0.1 М monomer and 0.3 М of oxalic acid on corrosion of low-carbon steel. The density of corrosion current of steel electrodes covered with one-layer polymeric coatings rises by increasing of submergence time; however, after 180 minutes it turned out to be lower than the density of steel without coating. According to the experimental results, it is concluded that for prevention of steel formation in 1 M sulfuric medium, one-layer coatings have better inhibiting efficiency. In 1 M sulfuric medium, the sign of steel electrode potential covered with PPY is negative, and the sign of that with PANI turned to positive. In this medium after 180 minutes from submergence, the efficiency of steel with PPY is equal to 46.6 %, and of steel with PANI comprised 35.4 %.
