KINETIC MEASUREMENTS DURING TRANSIENT FILM GROWTH ON ZINC

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Chen, Y (Autor) Outra; Lobo, RFM (Autor) Outra; Sequeira, CAC (Autor) Outra

Revista

Título: Quimica Nova

Vol. 32 Nº 8

Páginas: 387-390

ISSN: 0100-4042

Editora: Sociedade Brasileira de Quimica

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 5 Citações

Outras Informações

ID Authenticus: P-003-RZW

DOI: 10.1590/s0100-40422009000200022

Abstract (EN): The electrochemical behaviour of zinc has been extensively studied in alkaline and acid media, but only a few studies have been reported in neutral solutions, particularly in deaerated media. Zinc passivation in neutral medium and the effect of the ClO4- ion on the nucleation and growth of the passive layer is studied in this paper by a transient technique at different electrolyte concentrations and applied potentials. ZnO growth rate was shown to decrease with increasing electrolyte concentration. Moreover, passive layer growth occurred followed by pitting nucleation and growth. Film growth and pit nucleation are explained by means of the Macdonald and Engell-Stolica models.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4