Abstract
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.
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