Characterization of Corrosion Films on Lead by Infrared Reflection Spectroscopy.
Abstract
This report contains the manuscipt of a thesis by A. Goldfarb, M.S. candidate in Ocean Engineering at the University of Rhode Island. Electrochemical exposures of lead samples in aqueous carbonate, phosphate, sulfate and chloride solutions were made at various pH and potential values. The resulting surface films were investigated by infrared reflection spectroscopy in order to identify the surface species; to show the applicability of the reflection technique to corrosion research. The experimental results were compared to the appropriate theoretical Pourbaix diagram. The experimental results did not always confirm the theoretical prediction mainly due to the lack of the kinetic effect in the Pourbaix diagram calculation. Thicknesses of passive films formed on lead in sulfate solutions were measured. From this the sensitivity of infrared reflection spectroscopy for detecting this type of films was found to be better than 200 Angstroms. Infrared reflection spectra were compared to the appropriate transmission spectra and explanations for bands' shift, angle of incidence dependence, and number of reflections are given. Preliminary experiments of high temperature Armco iron exposures are also presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1978
- Accession Number
- ADA058883
Entities
People
- Arnon Goldfarb
- C. M. Brown
- R. Heidersbach
Organizations
- University of Rhode Island