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Titolo:
Modification of reactive metals by aqueous electrochemical process
Autore:
Iroh, JO; Su, W;
Indirizzi:
Univ Cincinnati, Dept Mat Sci & Engn, Cincinnati, OH 45221 USA Univ Cincinnati Cincinnati OH USA 45221 & Engn, Cincinnati, OH 45221 USA
Titolo Testata:
SURFACE ENGINEERING
fascicolo: 3, volume: 15, anno: 1999,
pagine: 249 - 254
SICI:
0267-0844(1999)15:3<249:MORMBA>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-CARBON STEEL; POLYPYRROLE FILMS; IRON; ELECTROPOLYMERIZATION; PYRROLE; ELECTRODES; COATINGS; KINETICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Iroh, JO Univ Cincinnati, Dept Mat Sci & Engn, Cincinnati, OH 45221 USA Univ Cincinnati Cincinnati OH USA 45221 Cincinnati, OH 45221 USA
Citazione:
J.O. Iroh e W. Su, "Modification of reactive metals by aqueous electrochemical process", SURF ENG, 15(3), 1999, pp. 249-254

Abstract

Polypyrrole coatings have been successfully formed art steel from aqueous oxalic acid-pyrrole solutions by electrochemical polymerisation. The formation of the coatings was found to be dependent on the pH of the reaction solution and the applied current. In an acidic medium, the formation of polypyrrole was characterised by an induction (passivation) period before electropolymerisation of pyrrole. At the end of the induction period a crystallinepassive interphase was formed. The morphology and composition of the electrodeposited passive inter phase and the resultant polypyrrole coatings wereinvestigated by scanning electron microscopy, reflection-absorption infrared spectroscopy, and X-ray photoelectron spectroscopy. The results reveal that the chemical composition of the passive interphase was similar to that of iron (II) oxalate dihydrate (FeC2O4.2H(2)O) crystals. The size and orientation of the crystalline passive interphase varied with the electrochemical process variables. (C) 1999 IoM Communications Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 19:40:40