skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: AC impedance studies of aluminum alloy 6061 in chloride solutions: The role of oxygen, hydrogen ions, and aluminum ions in initiating crevice corrosion

Abstract

The purpose of this research was to determine whether oxygen molecules, hydrogen ions, or aluminum ions initiate the crevice corrosion of aluminum alloy 6061 in aqueous chloride solutions. Corrosion-potential and ac-impedance measurements show that pH is the dominant factor in accordance with the crevice-corrosion mechanism. It is further proposed that crevice corrosion occurs because film breakdown mechanisms prevail over film repair mechanisms in the crevice when the pH drops to values near 4. In this pH regime aluminum ion dissolution is thermodynamically favored over insoluble aluminum oxide formation at the solution-solid interface.

Authors:
Publication Date:
Research Org.:
General Motors Research Labs., Physical Chemistry Dept., Warren, MI 48090
OSTI Identifier:
6339117
Resource Type:
Journal Article
Journal Name:
J. Electrochem. Soc.; (United States)
Additional Journal Information:
Journal Volume: 134:6; Journal Issue: 6
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; CORROSION; CHLORIDES; CORROSIVE EFFECTS; ALTERNATING CURRENT; ALUMINIUM COMPOUNDS; AQUEOUS SOLUTIONS; DISSOLUTION; ELECTRIC IMPEDANCE; FILMS; HYDROGEN COMPOUNDS; IONS; OXYGEN; PH VALUE; QUANTITY RATIO; ALLOYS; CHARGED PARTICLES; CHEMICAL REACTIONS; CHLORINE COMPOUNDS; CURRENTS; DISPERSIONS; ELECTRIC CURRENTS; ELEMENTS; HALIDES; HALOGEN COMPOUNDS; IMPEDANCE; MIXTURES; NONMETALS; SOLUTIONS; 360105* - Metals & Alloys- Corrosion & Erosion

Citation Formats

Reising, R F. AC impedance studies of aluminum alloy 6061 in chloride solutions: The role of oxygen, hydrogen ions, and aluminum ions in initiating crevice corrosion. United States: N. p., 1987. Web. doi:10.1149/1.2100674.
Reising, R F. AC impedance studies of aluminum alloy 6061 in chloride solutions: The role of oxygen, hydrogen ions, and aluminum ions in initiating crevice corrosion. United States. https://doi.org/10.1149/1.2100674
Reising, R F. 1987. "AC impedance studies of aluminum alloy 6061 in chloride solutions: The role of oxygen, hydrogen ions, and aluminum ions in initiating crevice corrosion". United States. https://doi.org/10.1149/1.2100674.
@article{osti_6339117,
title = {AC impedance studies of aluminum alloy 6061 in chloride solutions: The role of oxygen, hydrogen ions, and aluminum ions in initiating crevice corrosion},
author = {Reising, R F},
abstractNote = {The purpose of this research was to determine whether oxygen molecules, hydrogen ions, or aluminum ions initiate the crevice corrosion of aluminum alloy 6061 in aqueous chloride solutions. Corrosion-potential and ac-impedance measurements show that pH is the dominant factor in accordance with the crevice-corrosion mechanism. It is further proposed that crevice corrosion occurs because film breakdown mechanisms prevail over film repair mechanisms in the crevice when the pH drops to values near 4. In this pH regime aluminum ion dissolution is thermodynamically favored over insoluble aluminum oxide formation at the solution-solid interface.},
doi = {10.1149/1.2100674},
url = {https://www.osti.gov/biblio/6339117}, journal = {J. Electrochem. Soc.; (United States)},
number = 6,
volume = 134:6,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 1987},
month = {Mon Jun 01 00:00:00 EDT 1987}
}