KINETIC MEASUREMENTS DURING TRANSIENT FILM GROWTH ON ZINC

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Chen, Y (Author) Other; Lobo, RFM (Author) Other; Sequeira, CAC (Author) Other

Journal

Title: Quimica Nova

Vol. 32 No. 8

Pages: 387-390

ISSN: 0100-4042

Publisher: Sociedade Brasileira de Quimica

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 5 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4