CORROSION CHARACTERISTICS OF CHROMATED ZINC IN SODIUM-CHLORIDE SOLUTIONS

Authors
BUCINSKIENE D VIRBALYTE D SUDAVICIUS A JUZELIUNAS E
Citation
D. Bucinskiene et al., CORROSION CHARACTERISTICS OF CHROMATED ZINC IN SODIUM-CHLORIDE SOLUTIONS, Corrosion, 53(2), 1997, pp. 142-146
Citations number
20
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
Corrosion → ACNP
ISSN journal
00109312
Volume
53
Issue
2
Year of publication
1997
Pages
142 - 146
Database
ISI
SICI code
0010-9312(1997)53:2<142:CCOCZI>2.0.ZU;2-Z
Abstract
The corrosion behavior of zinc with a chromate conversion coating cont aining similar to 0.02 g/m(2) Cr(VI) was investigated. X-ray photoelec tron spectroscopy (XPS) showed Cr(VI) was Located in layers near the s urface of the coating. Corrosion current densities and Cr(VI) content in the coating decreased with immersion time. An electrochemical reduc tion of Cr(VI) to Cr(III) parallel to oxygen (O-2) reduction In the fi rst stages of immersion was reviewed. Inhibition of the corrosion rate proceeded simultaneously with dissolution of the conversion coating. It was concluded that the thickness of the coating wets not the most i mportant factor to hinder O-2 reduction. Corrosion inhibition was attr ibuted to zinc surface passivation byproducts of ionization.