Parsley Leaves (Petroselinum Sativum) as Corrosion Inhibitors of Steel DIN 2391 St 37-4 in Acid Medium 5% H2SO4

In this article, the corrosion inhibition of steel DIN 2391 St 37-4 in acidic medium 5% H2SO4 with and without presence eco inhibitors leaf (Petroselinum Sativum) was examined. Inhibitory properties parsley leaves on were examined by potentiodynamic polarization - Tafel extrapolation, FTIR method order to categorize oxide layer. The test performed static stirring at 600 rpm. By extrapolation based changes potential, inhibitor behaves as mixed. Increasing concentration increases efficiency inhibition. Corrosion processes are inhibited adsorption organic matter surface 37-4, forming a film. obtained results indicate that is an effective for tested sulfuric acid.