The work investigates improving the corrosion resistance of buried steel rods by coating it with polyaniline (PANi). Buried steel has many industrial applications especially in petroleum oil transportation between countries construction of large metallic buildings, bridges, tanks, pipelines, etc. Compared to metallic coats PANI is not only environmentally friendly but also it is less expensive. The galvanostatic technique was used in forming the PANi layer. The formed PANi layer was investigated for its corrosion resistance while couples with stainless steel cathode and buried in sand containing known amounts of moisture, NaCl and sulphuric acid (H2SO4) using the potentiodynamic examination test. In addition investigation for the characteristics of the formed layer using X-ray Photoelectron Spectroscopy (XPS) and Ellipsometric analysis was carried out. The results show that coating steel with PANi layer can improve its corrosion resistance against NaCl, H2SO4 and water by a factor up to 1.88, 1.89 and 1.56 respectively.

Improving the corrosion resistance of buried steel by using Polyaniline coats

243rd National Meeting (2012)

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