Synthesis, characterization and corrosion protection study of polypyrrole/phosphotungstate coating on low alloy steel in seawater

• Published in: Polymer science. Series B Vol. 53; no. 9-10; pp. 546 - 552
• Main Authors: Hou, Jian, Zhu, Guang, Zheng, Jiaqing
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.10.2011; Pleiades
• Subjects: Applied sciences; Chemistry; Chemistry and Materials Science; Coating; Composites; Corrosion prevention; Diffraction; Dopants; Exact sciences and technology; Low alloy steels; Open circuit potential; Organic polymers; Physicochemistry of polymers; Polymer Sciences; Polymers with particular properties; Polypyrroles; Preparation, kinetics, thermodynamics, mechanism and catalysts; X-rays; Polymer Science Series; Composite Coating; Open Circuit Potential; Electrochemical Impedance Spectroscopy; Polypyrrole; Corrosion protective layer; Tungstophosphoric acid; Electrical conductivity; Coating material; Electrical properties; Low carbon steel; Nyquist diagram; Experimental study; Corrosion protection; Thermal stability; Open circuit voltage; Conducting polymers; Morphology; Preparation; Doped polymer; Oxidative polymerization; Pyrrole polymer; Sea water corrosion; Electrochemical impedance spectroscopy
• ISSN: 1560-0904; 1555-6123
• DOI: 10.1134/S1560090411100034

Polypyrrole was prepared by chemical oxidation with ammonium persulfate as the oxidant, phosphotungstic acid as the dopant, and its molecular structure was characterized by FTIR spectrum, X-ray diffraction and EDX. A composite coating by using polypyrrole as functional component was prepared on the low alloy steel surface, and its anticorrosion properties were investigated by the open circuit potential and EIS. The results indicated that the coating contained dopant displayed an excellent anticorrosion property for the low alloy steel.