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Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Online from: 1954
Subject Area: Mechanical & Materials Engineering
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Preparation and anticorrosion properties of polyaniline-containing coating on Mg-Li alloy
| Title: | Preparation and anticorrosion properties of polyaniline-containing coating on Mg-Li alloy |
|---|---|
| Author(s): | Xing Juan Chen, (College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, China), Cheng Luo, (College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, China), Zheng Han Zhang, (College of Electrical & Electronic Engineering, Harbin University of Science and Technology, Harbin, China), Min Zhao, (College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, China) |
| Citation: | Xing Juan Chen, Cheng Luo, Zheng Han Zhang, Min Zhao, (2012) "Preparation and anticorrosion properties of polyaniline-containing coating on Mg-Li alloy", Anti-Corrosion Methods and Materials, Vol. 59 Iss: 6, pp.291 - 298 |
| Keywords: | Alloys, Anti-corrosion coating, Anti-corrosion properties, Chemical oxidative polymerization, Coatings, Corrosion resistance, Emulsion polymerization, Mg-Li alloy, Polyaniline, Polymers |
| Article type: | Research paper |
| DOI: | 10.1108/00035591211274406 (Permanent URL) |
| Publisher: | Emerald Group Publishing Limited |
| Abstract: | Purpose – The purpose of this investigation was to synthesize a doped polyaniline-containing coating and investigate the anti-corrosion properties of the coating on Mg-Li alloy. Design/methodology/approach – The doped polyaniline pigments were prepared by two different methods using ammonium persulphate as oxidant and hydrochloric acid, phosphoric acid, p-toluene sulfonic acid and sulfosalicylic acid as doping agents. The doped polyaniline was characterized by Fourier transform infrared (FT-IR) analysis, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The coatings consisted of polyaniline, epoxy resin and other additives that were formed on Mg-Li alloy. The anti-corrosion properties of the polyaniline-containing coating on the Mg-Li alloy were investigated in 3.5?wt.% NaCl solution using open circuit potential logging and electrochemical impedance spectroscopy. Findings – The results of the electrochemical tests indicated that the polyaniline-containing coatings showed better anti-corrosion properties, as compared to conventional epoxy coatings on Mg-Li alloy when exposed in 3.5?wt.% NaCl solution. The coating containing 2?wt.% polyaniline (relative to the mass of epoxy resin) doped with hydrochloric acid had the best anti-corrosion properties on the Mg-Li alloy. Originality/value – Previous reports on the anti-corrosion properties of polyaniline-containing coatings focused mainly on the surface of iron, steel, aluminum and magnesium, and there have been few studies on the anti-corrosion properties as protective coatings for Mg-Li alloy. |
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