The Effects of Temperature on the Chemical Oxidation of AMg-3 Alloy in Molybdate-Containing Solutions

S. V. Oleinik, E. M. Malygina, and Yu. M. Zimina

Frumkin Institute of Physical Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991 Russia
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Received September 27, 2006

Abstract — It is shown that protective conversion coatings (CC), which are resistive to pitting corrosion and chloride-containing media, are formed on an AMg-3 alloy in molybdate-containing solutions within a temperature range from 60 to 80°C. The dependence of the composition and the thickness of the CC film on the oxidation temperature are established. The effects of the complexone added to the IFKhANAL-1 conversion solution on the composition, thickness, and the protective properties of CC, as well as the role of the complexone, in the film-formation processes are studied.