Electrosynthesis of homogeneous and adherent polypyrrole coatings on iron and steel electrodes by using a new electrochemical procedure

• Type: Article in International Scientific Journal
• Date: 2002

Authors

José Inácio Martins (Author) FEUP; Bazzaoui, M (Author) Other; Reis, TC (Author) Other; Bazzaoui, EA (Author) Other; Martins, L (Author) Other

Journal

Title: Synthetic Metals

Vol. 129

Pages: 221-228

ISSN: 0379-6779

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 75 Citations

ISI Web of Science

Scopus - 84 Citations

Other information

Authenticus ID: P-000-NBK

DOI: 10.1016/s0379-6779(02)00057-7

Abstract (EN): A single step electropolymenzation of pyrrole (Py) on iron and steel surfaces has been performed in aqueous medium in the presence of malate (C(4)H(4)O(5)(2-)) as supporting electrolyte The malate counter ion slows down the iron dissolution by leading to the formation of a passivation layer on the working electrode surface and the Py electropolymenzation starts on The polypyrrole (PPy) films electrosynthesized. under different electrochemical techniques are uniform and adherent The polymer coatings performed galvanostatically have a cauliflower like structure and are thicker than those obtained by potentiodynamic mode The adherence of PPy layers to the iron electrodes was estimated at 100% according to the standard sellotape test Scanning electron microscopy (SEM) X ray photoelectron spectroscopy (XPS) and Founer transform infrared (FTIR) analysis showed that the obtained coatings have the same structure and morphological properties as those electrodeposited on Pt electrodes

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8