Raman and Infrared Spectroscopy of Aqueous Corrosion Films on Lead in 0.1M Chloride Solutions

The Pb--H2O--Cl Pourbaix diagram was investigated by examining potentiostatically oxidized Pb samples using Raman and infrared spectroscopy. The surface films formed in 0.1M HCl solution were those predicted by the potential pH diagram. In neutral and basic solutions, the film compositions were not...

Full description

Saved in:
Bibliographic Details
Published inJournal of the Electrochemical Society Vol. 127; no. 8; pp. 1702 - 1706
Main Authors Thibeau, Richard J., Brown, Chris W., Goldfarb, Arnon Z., Heidersbach, Robert H.
Format Journal Article
LanguageEnglish
Published 01.08.1980
Online AccessGet full text

Cover

More Information
Summary:The Pb--H2O--Cl Pourbaix diagram was investigated by examining potentiostatically oxidized Pb samples using Raman and infrared spectroscopy. The surface films formed in 0.1M HCl solution were those predicted by the potential pH diagram. In neutral and basic solutions, the film compositions were not as predicted by thermodynamic calculations, although potentiostatic results agreed very well with potentiodynamic polarization curves. Two polymorphs of PbO were found at different potentials in pH 7 solutions, the orthorhombic form at low potentials and the tetragonal form > +0.18V vs. NHE. Infrared spectra gave indications that orthorhombic PbO is formed by deposition from solution while tetragonal PbO forms from the reaction of water with the metallic Pb surface.17 refs.--AA
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2129983