Investigation of the Influence of Applied Potential on Erosion-Corrosion of Copper in Alkaline Chloride Solutions.
Abstract
A novel electrochemical cell incorporating a scanning ellipsometer was designed and used to investigate the hypothesis that the critical shear observed for the erosion-corrosion of copper was associated with a shear-induced removal of protective film. While high-shear flow was shown to increase the rate of corrosion of copper in aerated and de-aerated saline solutions, ellipsometry indicated that shear induced removal of protective films did not take place, even for shear stresses ten times the reported critical shear for erosion-corrosion of copper. Subsequent work showed that a differential mass transfer mechanism could generate localized corrosion, but the visual appearance of the surface did not resemble classical products of erosion-corrosion. Separate potentiodynamic and impedance experiments were conducted to identify the electrochemical behavior, and new techniques were developed to interpret impedance spectra. Papers resulting from this work are attached
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1993
- Accession Number
- ADA266448
Entities
People
- Mark E. Orazem
Organizations
- University of Florida