AN ELECTROCHEMICAL AND SERS STUDY OF THE ACTION OF POLYVINYLPYRROLIDONE AND POLYETHYLENIMINE AS INHIBITORS FOR COPPER IN AERATED H2SO4

Authors
SCHWEINSBERG DP HOPE GA TRUEMAN A OTIENOALEGO V
Citation
Dp. Schweinsberg et al., AN ELECTROCHEMICAL AND SERS STUDY OF THE ACTION OF POLYVINYLPYRROLIDONE AND POLYETHYLENIMINE AS INHIBITORS FOR COPPER IN AERATED H2SO4, Corrosion science, 38(4), 1996, pp. 587-599
Citations number
25
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
Corrosion science → ACNP
ISSN journal
0010938X
Volume
38
Issue
4
Year of publication
1996
Pages
587 - 599
Database
ISI
SICI code
0010-938X(1996)38:4<587:AEASSO>2.0.ZU;2-Q
Abstract
The adsorption and inhibitive effects of polyvinylpyrrolidone (PVP) an d polyethylenimine (PEI) on copper in 2 M H2SO4 at 30 degrees C have b een investigated by means of weight loss, potentiodynamic and in situ surface-enhanced Raman scattering (SERS) techniques. Both polymers red uce the rate of the anodic (metal dissolution) and cathodic (O-2 reduc tion) corrosion reactions. At all concentrations studied, PVP was foun d to be the better inhibitor. The dependence of the adsorbate spectra on applied potential and pH was established. There was evidence for PV P adsorption through oxygen whilst PEI showed coordination through the nitrogen atom.