Some Features of the Local Depassivation of Binary Alloys
Yu. I. Kuznetsov* and M. V. Rylkina**
* Institute of Physical Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991 Russia
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** Udmurt State University, Universitetskaya ul. 1, Izhevsk, 426034 Russia
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Received December 19, 2003
Abstract — Pitting resistances of Fe–Cr, Fe–Ni, Fe–B, Cu–Ni, and Cu–Zn binary alloys were studied. The effects of the composition and protective properties of a passive film, the phase composition of the alloy, and the nature and concentration of an activating anion were analyzed. It was demonstrated that the basic concepts of complexation are applicable to the depassivation of binary alloys in aqueous solutions.
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type is electrochemically studied after a service or laboratory loading simulating conditions of airplane flight. The effect of loading on the polarization current was revealed. The change in the electrochemical behavior was related to structure transformations and segregation in the alloy. Diagnostic electrochemical criteria of the precriticality state of titanium alloys and steel articles were determined.