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Anode Properties of Potassium-Doped Lead Antimony Alloy PbSb3 in NaCl Electrolyte Medium

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Inorganic Materials: Applied Research Aims and scope

Abstract

The results of studying the corrosion electrochemical properties in NaCl electrolyte medium are presented for varying concentrations of potassium as a structural modifier in lead antimony alloy PbSb3. The studies are carried out using a potentiostatic approach in the potentiodynamic mode at a potential sweep rate of 2 mV/s. The electrolyte medium contains NaCl in concentration of 0.03, 0.3, and 3.0 wt %. It is established that growing concentration of chloride ion in NaCl electrolyte shifts the values of potentials of corrosion, pitting onset, and repassivation of potassium-doped PbSb3 to the negative domain. The free alloy corrosion potential shifts to the positive region of values with time. This relationship is also typical of the situation where potassium concentration increases in PbSb3. Adding potassium to PbSb3 alloy results in improving the corrosion resistance by 30%. At the same time, an increase in the corrosion rate caused by NaCl in the electrolyte is established irrespective of alloy composition. It is shown that alloys corrode following the pitting mechanism and potassium acting as the alloy structural modifier contributes to shifting the potentials of pitting onset and repassivation to the domain of positive values. This, in turn, improves the resistivity of alloys to pitting corrosion and facilitates healing of new pitting spots.

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Authors and Affiliations

  1. Nikitin Institute of Chemistry, National Academy of Sciences of Tajikistan, Dushanbe, Republic of Tajikistan

    I. N. Ganiev & Sh. Sh. Okilov

  2. Innovative Technologies State Research Center, National Academy of Sciences of Tajikistan, Dushanbe, Republic of Tajikistan

    B. B. Eshov, N. M. Mulloeva & Dzh. Kh. Dzhailoev

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  1. I. N. Ganiev
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  2. Sh. Sh. Okilov
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  3. B. B. Eshov
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  4. N. M. Mulloeva
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  5. Dzh. Kh. Dzhailoev
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Correspondence to I. N. Ganiev.

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Translated by V. Vetrov

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Ganiev, I.N., Okilov, S.S., Eshov, B.B. et al. Anode Properties of Potassium-Doped Lead Antimony Alloy PbSb3 in NaCl Electrolyte Medium. Inorg. Mater. Appl. Res. 14, 1047–1051 (2023). https://doi.org/10.1134/S2075113323040147

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  • DOI: https://doi.org/10.1134/S2075113323040147

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