Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Synthesis of ZnO Nanopowder by Gel Combustion and Its Using in Corrosion Resistant Coatings of Polymer/ZnO Composites

Document Type : Research Article

Authors
Vajiheh Khani 1
Leila Sharifi 1
Arash Payami 2
Hossein Kohani 2
Seyyed Hossein Mirhosseini 1
1 Academic Center for Education, Culture and Research (ACECR), Yazd Branch, P.O.BOX 89415145 Yazd, I.R. IRAN
2 Niroo Research Institute, P.O. Box 14665517 Tehran, I.R. IRAN
Abstract
Composite coatings of polymer/ceramic are one of good options for corrosion inhibition in water and water sewage pipelines. In this work, ZnO nanopowder was synthesized by combustion sol gel Process. Then, two coating types of epoxy/ZnO and polyaniline/ZnO were applied on steel pipes. The nano powder and the coatings were characterized by X-Ray Diffractometry (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform-Infrared Spectroscopy (FT-IR.( Concentration of coating's elements diffused into water was investigated. Results show that concentration of metals diffused into the water are less than standard limited concentrations and might not be health hazardous. To investigate the corrosion behavior of the applied coating, open circuit potential was applied on both coatings. To evaluate the capability of the coatings in corrosion speed decrement, Toefl curves are assessed. Results show that ZnO nano particles (25nm) in the polymer matrix can enhance corrosion resistance of steel pipes enormously and in this case epoxy/ZnO coatings are superior.
Keywords
Nano composite coatings
Gel combustion
Polymer
Zinc oxide
Chemical corrosion
Subjects
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