Abstract
Chemical conversion treatment of Mg−Al alloy (AZ91) using colloidal silica as an alternative to chromate conversion was investigated as a function of solution pH, temperature, solution conditions, and treatment time. The solution used for the colloidal silica coating consisted of colloidal silica, titanium sulfate, and cobalt ions to maintain good anti-corrosion and adhesion properties. Adding CoSO4 to the colloidal silica solution enhanced the adhesion force between the silica film and magnesium substrate. The optimum conditions for the chemical conversion treatment solution were pH 2, 90-sec treatment, and 25°C.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
R. G. Buchheit, R. P. Grant, P. F. Hlava, B. Mckenzie, and G. Zender,J. Electrochem. Soc. 144, 2621 (1997).
Z. A. Foroulis and M. J. Thubrikar.,J. Electrochem. Soc. 122, 1296 (1975).
J. A. Richardson and G. C. Wood,J. Electrochem. Soc. 120, 193 (1973).
H. Bohni and H. H. Uhlig,J. Electrochem. Soc.,116, 906. (1969).
G. O. Ilevbare and J. R. Scully,J. Electrochem. Soc. 148, B196 (2001).
S.-J. Kim, Y. Mizutani, M. Okido, R. Ichino S. Tanikawa, and S. Hasegawa,Moter. Trans (be submitted).
Y. Mizutani, S. J. Kim, R. Ichino, and M. Okido,The 6th ASFF, AEPSE 2001, 5th APIC, and 4th JKSPTFT: Anodizing Mg Alloys on Alkaline Solutions Frontiers of Surface Engineering 2001 Conf. and Exhibition, p. 178, The Surf. Finishing Soc., Jpn, Nagoya, Japan (2001).
H. Umehara, M. Takaya and Y. Kojima,J. Jpn Inst. Light Met. 50, 109 (2000).
S. Ono, M. Saito, M. Horigochi, K. Terashima, K. Matsusaka, A. Shida, T. Osaka and N. Masuko,The Surf Finshiing Soc. Jpn.,47, 263 (1996).
K. Masatosi and T. Kazuo,Interfacial Chemistry, p. 135, Maruzen (2001).
K. Manabu,Oxidation Titanium, p. 255, Gihodo Publ. Co. (2000).
T. Hongxia,Appl. Cataly. B 30, 277 (2001).
S. Saihu,Science of the Sol-Gel Method, p. 88, Maguneshouhusa, (1988).
J. W. Johnson and W. J. James,Corros. Sci. 11, 153 (1971).
J. W. Johnson and W. J. James,Corrosion 23, 15 (1967).
D. C. Stiles and E. O. Edney,Corrosion 45, 896 (1989).
Y. Liu, W. Ren, L. Zhang and X. Yao,Thin Solid Films 353, 124 (1999).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kim, S.J., Zhou, Y., Ichino, R. et al. Characterization of the chemical conversion films that form on Mg−Al alloy in colloidal silica solution. Met. Mater. Int. 9, 207–213 (2003). https://doi.org/10.1007/BF03027279
Issue Date:
DOI: https://doi.org/10.1007/BF03027279