Corrosion Inhibition Study of Zinc Oxide-Polyaniline Nanocomposite for Aluminum and Steel

Abstract

Abstract:The nanocomposites of inorganic oxide with conducting polymer display novel properties resulting from the molecular level interaction of the two dissimilar chemical components. Recently, Farah et al have synthesized ZnO-polyaniline (PANI) nanocomposite, and have studied the electronic properties of ZnO-PANI films [1]. Although to date, chromium has proved the best candidate in corrosion inhibition in acidic medium, but still it is hoped that the combination of different techniques and various compounds will provide the required protection against corrosion. Our present study has shown that the ZnO-PANI nanocomposite coatings on steel and aluminum prevents corrosion due to the internal sacrificial electrode formation and as well as the barrier effect at the ZnO-PANI and metal interface.

Zinc Oxide Nanocomposites of Selected Polymers: Synthesis, Characterization, and Corrosion Inhibition Studies on Mild Steel in HCl Solution

“…Among the wide variety of metal oxide nanoparticles, ZnO is one of the most promising because of its unique properties such as thermal and mechanical stability at room temperature, good physical and chemical stability, environmental friendliness, abundant availability, and low cost. There are reports on the utilization of polypyrrole/ZnO, poly­( o -phenylenediamine- co -aniline)/ZnO, and polyaniline/ZnO as anticorrosion additives in different corrosive environments. ZnO nanoparticles have also been found to improve the thermal behavior of polymers. , …”

“…There are reports on the utilization of polypyrrole/ZnO, 16 poly(o-phenylenediamine-co-aniline)/ZnO, 17 and polyaniline/ ZnO 18 as anticorrosion additives in different corrosive environments. ZnO nanoparticles have also been found to improve the thermal behavior of polymers.…”