Initiation of crevice corrosion

Journal Article · Mon Mar 01 00:00:00 EST 1982 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2123887· OSTI ID:6597739

Alkire, R C; Siitari, D

Salient features of initial stages of aluminum crevice corrosion in a dilute chloride solution have been expressed with mathematical equations in order to relate corrosion behavior to transport and electrochemical phenomena. The features included in the model equations are metal dissolution, metal-ion hydrolysis, oxygen reduction, diffusion along the crevice, and ohmic resistance effects. The system of nonlinear differential equations was solved with a digital computer. Computations based on experiments described in the first part of this series were compared with experimental data including pH, potential, and current distributions. Theoretical predictions of the time at which breakdown occurred were found to be about one-half of the initiation time observed experimentally. The calculations gave trends in system behavior which correctly tracked observations upon variation of crevice gap and solution conductivity, but not crevice depth. 18 refs.

• Research Organization: Univ of Ill, Urbana, USA
• OSTI ID: 6597739
• Journal Information: J. Electrochem. Soc.; (United States), Vol. 129:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
CREVICE CORROSION
MATHEMATICAL MODELS
ELECTROCHEMISTRY
SODIUM CHLORIDES
ALKALI METAL COMPOUNDS
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
CORROSION
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
METALS
SODIUM COMPOUNDS
360105* - Metals & Alloys- Corrosion & Erosion