Abstract
This work investigates the possibility of improving the corrosion resistance of buried steel by coating it with polypyrrole (PPy) layer. The potentiostatic technique was used in precipitating the PPy layer. Investigation for the characteristics of the formed layer using different techniques such as X-Ray Photoelectron Spectroscopy (XPS), scanning electronic microscope (SEM) and Ellipsometric analysis was carried out. The formed PPy layer was examined for its corrosion resistance while coupled with stainless steel cathode and buried in sand containing different known amounts of moisture, salt (NaCl) and sulphuric acid (H2SO4) using the potentiodynamic examination test. The results show that coating steel with PPy layer can improve its corrosion resistance against NaCl, H2SO4 and water by factors up to 1.7, 1.80 and 1.57 respectively.