Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1994-05-20
1996-12-10
Silverberg, Sam
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
148275, 205183, C23C 2250
Patent
active
055826547
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.
REFERENCES:
patent: 2512493 (1950-06-01), Gide
patent: 3728188 (1973-04-01), Yarrington
patent: 3960676 (1976-06-01), Miyosawa et al.
patent: 3969152 (1976-07-01), Melotik
patent: 4451304 (1984-05-01), Batiuk
patent: 4610732 (1986-09-01), Sasaki et al.
patent: 4988396 (1991-01-01), Bibber
patent: 4992115 (1991-02-01), Ikeda
patent: 5192374 (1993-03-01), Kindler
patent: 5194138 (1993-03-01), Mansfield
patent: 5362335 (1994-11-01), Rungta
"Cationic Film Forming Inhibitors for The Protection of 7075 Aluminum Alloy Against Corrosion in Aqueous Chloride Solution" by D. R. Arnott, B. R. W. Hinton, and N. E. Ryan, published in Corrosion 86, Paper No. 197, Mar. 17-21, 1986.
"Cerium Conversion Coatings for the Corrosion Protection of Aluminum*" by B. R. W. Hinton, D. R. Arnott, and N. E. Ryan, Materials Forum, vol. 9, No. 3 (1986).
"Surface Modification of A1 Alloys and A1-Based Metal Matrix Composites by Chemical Passivation" by F. Mansfeld, S. Lin, S. Kim and H. Shih, published in Electrochimica Acta, vol. 34, No. 8, pp. 1123-1132 (1989).
"Corrosion Protection of Al Alloys and Al-Based Metal Matrix Composites by Chemical Passivation", by F. Mansfeld, S. Lin, S. Kim, and H. Shih, published in Corrosion, vol. 45, No. 8, pp. 615-631 (1989) Aug.
"Corrosion Inhibition with Rare Earth Metal Salts", by B. R. W. Hinton, published in Journal of Alloys and Compounds, 180 (1992) 15-25.
"Corrosion Protection of High-Copper Aluminum Alloys by Surface Modification" by F. Mansfeld and Y. Wang, a publication of the Corrosion and Environmental Effects Laboratory (CEEL) at the University of Southern California, Los Angeles.
"Improvement of the Corrosion Resistance of High-Copper AluminumAlloy" by S. H. Lin.
"Corrosion Protection of High-Cu Al Alloys by Surface Modification" by Y. Wang, a publication of the Corrosion and Environmental Effects Laboratory at the University of Southern California at Los Angeles.
Lin Simon H.
Mansfeld Florian B.
Wang You
Anderson Denton L.
Farah, M.D. David A.
Silverberg Sam
The University of Southern California
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