Method for creating a corrosion-resistant surface on aluminum alloys having a high copper content
Abstract
A method for treating the surface of aluminum alloys having a relatively high copper content is provided which includes the steps of removing substantially all of the copper from the surface, contacting the surface with a first solution containing cerium, electrically charging the surface while contacting the surface in an aqueous molybdate solution, and contacting the surface with a second solution containing cerium. The copper is substantially removed from the surface in the first step either by (i) contacting the surface with an acidic chromate solution or by (ii) contacting the surface with an acidic nitrate solution while subjecting the surface to an electric potential. The corrosion-resistant surface resulting from the invention is excellent, consistent and uniform throughout the surface. Surfaces treated by the invention may often be certified for use in salt-water services.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of Southern California, Los Angeles, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1531421
- Patent Number(s):
- 5582654
- Application Number:
- 08/247,147
- Assignee:
- University of Southern California (Los Angeles, CA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23F - NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE
- DOE Contract Number:
- N00014-91-J-1041
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 1994-05-20
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Mansfeld, Florian B., Wang, You, and Lin, Simon H. Method for creating a corrosion-resistant surface on aluminum alloys having a high copper content. United States: N. p., 1996.
Web.
Mansfeld, Florian B., Wang, You, & Lin, Simon H. Method for creating a corrosion-resistant surface on aluminum alloys having a high copper content. United States.
Mansfeld, Florian B., Wang, You, and Lin, Simon H. Tue .
"Method for creating a corrosion-resistant surface on aluminum alloys having a high copper content". United States. https://www.osti.gov/servlets/purl/1531421.
@article{osti_1531421,
title = {Method for creating a corrosion-resistant surface on aluminum alloys having a high copper content},
author = {Mansfeld, Florian B. and Wang, You and Lin, Simon H.},
abstractNote = {A method for treating the surface of aluminum alloys having a relatively high copper content is provided which includes the steps of removing substantially all of the copper from the surface, contacting the surface with a first solution containing cerium, electrically charging the surface while contacting the surface in an aqueous molybdate solution, and contacting the surface with a second solution containing cerium. The copper is substantially removed from the surface in the first step either by (i) contacting the surface with an acidic chromate solution or by (ii) contacting the surface with an acidic nitrate solution while subjecting the surface to an electric potential. The corrosion-resistant surface resulting from the invention is excellent, consistent and uniform throughout the surface. Surfaces treated by the invention may often be certified for use in salt-water services.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}
Works referenced in this record:
Corrosion protection of high copper aluminium alloys by surface modification
journal, January 1994
- Mansfeld, F.; Wang, Y.
- British Corrosion Journal, Vol. 29, Issue 3
Corrosion inhibition with rare earth metal salts
journal, March 1992
- Hinton, B. R. W.
- Journal of Alloys and Compounds, Vol. 180, Issue 1-2
Surface modification of Al alloys and Al-based metal matrix composites by chemical passivation
journal, August 1989
- Mansfeld, F.; Lin, S.; Kim, S.
- Electrochimica Acta, Vol. 34, Issue 8
Cationic-Film-Forming Inhibitors for the Protection of the AA 7075 Aluminum Alloy Against Corrosion in Aqueous Chloride Solution
journal, January 1989
- Arnott, D. R.; Hinton, B. R. W.; Ryan, N. E.
- CORROSION, Vol. 45, Issue 1
Corrosion Protection of Al Alloys and Al-Based Metal Matrix Composites by Chemical Passivation
journal, August 1989
- Mansfeld, F.; Lin, S.; Kim, S.
- CORROSION, Vol. 45, Issue 8