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Anodic behavior of Zn22Al Alloy doped with gallium in corrosion-active environments
https://doi.org/10.22349/1994-6716-2022-112-4-94-101
Abstract
The paper presents results of an experimental research of anodic behaviour of Zn22Al alloy doped with gallium in corrosion-active environments HCl, NaCl and NaOH. The electrochemical potentials of corrosion, pitting formation and repassivation of gallium-doped alloys are shifted towards positive values compared to the basic Zn22Al alloy. Alloys, containing 0.01–1.0 wt% gallium, in the pH range from 3 to 9 are the most resistant to pitting corrosion. The corrosion rate of alloys micro doped (0.01–0.1%) with gallium is 1.5–2.5 times lower than that of the basic Zn22Al alloy. The corrosion products of the studied alloys consist of protective oxide films of ZnO, Ga2O3, ZnAl2O4, Al2O3·Ga2O3.
About the Authors
J. H. Sharipov
Institute of Chemistry named after V.I. Nikitin of the National Academy of Sciences of Tajikistan
Tajikistan
Tajikistan
34063 Dushanbe, St Aini, 299/2
F. A. Aliev
Institute of Chemistry named after V.I. Nikitin of the National Academy of Sciences of Tajikistan
Tajikistan
Tajikistan
34063 Dushanbe, St Aini, 299/2
I. N. Ganiev
Institute of Chemistry named after V.I. Nikitin of the National Academy of Sciences of Tajikistan
Tajikistan
Tajikistan
Dr Sc (Chem)
34063 Dushanbe, St Aini, 299/2
Z. R. Obidov
Institute of Chemistry named after V.I. Nikitin of the National Academy of Sciences of Tajikistan
Tajikistan
Tajikistan
Dr Sc (Chem)
34063 Dushanbe, St Aini, 299/2
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Review
For citations:
Sharipov J.H., Aliev F.A., Ganiev I.N., Obidov Z.R. Anodic behavior of Zn22Al Alloy doped with gallium in corrosion-active environments. Voprosy Materialovedeniya. 2022;(4(112)):94-101. (In Russ.) https://doi.org/10.22349/1994-6716-2022-112-4-94-101
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