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Pitting corrosion of copper. An equilibrium - mass transport study

Abstract

A mathematical model for the propagation of corrosion pits on copper is described. The model is used to predict the potentials below which copper is immune to pitting. The criteria used for immunity against pitting is that the volume of the cuprous oxide formed at the site of the metal oxidation at the bottom of a corrosion pit must be smaller than the volume of the oxidised metal. Equal volumes would give a complete coverage of the metal in a pit by adherent cuprous oxide and propagation would not be possible. For potentials where copper is not immune to pitting an estimate of the maximum growth rate is given. The model uses equilibrium data and diffusion coefficients and calculates the stationary concentration profiles from the bulk water outside a corrosion pit to the site of the metal dissolution at the bottom a corrosion pit. Precipitation of oxides as well as of basic salts of copper is considered. A total of 26 aqueous species are considered in waters with compositions ranging from those of tap waters to that of sea water. Calculations are made for the temperatures 25 deg C and 75 deg C. 38 refs, 60 figs, 17 tabs
Authors:
Publication Date:
Nov 01, 1996
Product Type:
Technical Report
Report Number:
KI-96-8-E
Reference Number:
SCA: 360105; PA: SWD-97:007240; EDB-97:049982; NTS-97:008506; SN: 97001762096
Resource Relation:
Other Information: PBD: Nov 1996
Subject:
36 MATERIALS SCIENCE; COPPER; PITTING CORROSION; MATHEMATICAL MODELS; EXPERIMENTAL DATA
OSTI ID:
453667
Research Organizations:
Swedish Corrosion Inst., Stockholm (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0348-7199; Other: ON: DE97736469; TRN: SE9707240
Availability:
OSTI as DE97736469
Submitting Site:
SWD
Size:
108 p.
Announcement Date:

Citation Formats

Taxen, C. Pitting corrosion of copper. An equilibrium - mass transport study. Sweden: N. p., 1996. Web.
Taxen, C. Pitting corrosion of copper. An equilibrium - mass transport study. Sweden.
Taxen, C. 1996. "Pitting corrosion of copper. An equilibrium - mass transport study." Sweden.
@misc{etde_453667,
title = {Pitting corrosion of copper. An equilibrium - mass transport study}
author = {Taxen, C}
abstractNote = {A mathematical model for the propagation of corrosion pits on copper is described. The model is used to predict the potentials below which copper is immune to pitting. The criteria used for immunity against pitting is that the volume of the cuprous oxide formed at the site of the metal oxidation at the bottom of a corrosion pit must be smaller than the volume of the oxidised metal. Equal volumes would give a complete coverage of the metal in a pit by adherent cuprous oxide and propagation would not be possible. For potentials where copper is not immune to pitting an estimate of the maximum growth rate is given. The model uses equilibrium data and diffusion coefficients and calculates the stationary concentration profiles from the bulk water outside a corrosion pit to the site of the metal dissolution at the bottom a corrosion pit. Precipitation of oxides as well as of basic salts of copper is considered. A total of 26 aqueous species are considered in waters with compositions ranging from those of tap waters to that of sea water. Calculations are made for the temperatures 25 deg C and 75 deg C. 38 refs, 60 figs, 17 tabs}
place = {Sweden}
year = {1996}
month = {Nov}
}