Abstract

Polypyrrole coatings with varying surface morphology have been formed on a stainless steel working electrode using benzene sulfonic acid sodium salt as the electrolyte. The morphology of the coatings varied with the current density. The amount of polypyrrole formed during electropolymerization increased with current density and monomer concentration, but was unaffected by increased electrolyte concentration. The electropolymerization potential of pyrrole increased with increased current density but the current efficiency remained relatively unchanged at 99–105%. The rate of electropolymerization of pyrrole onto stainless steel increased slightly with increased monomer concentration. The electropolymerization potential decreased with increased monomer and electrolyte concentration.

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