Polypyrrole coatings were successfully electrodeposited on low-carbon steel substrates from aqueous oxalate solutions. The surface composition and topography of the polypyrrole coatings formed under different conditions were investigated by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The results show that the surface composition of the electrodeposited polypyrrole coatings basically reflects their bulk composition. Deposition of polypyrrole coatings on steel substrates also increased the surface roughness of the steel substrates.
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Su et al. (2000) studied this question.
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