Authors: I.N. Ganiev, Z.D. Makhsumov, F.S. Davlatzoda, U.Sh. Yakubov, Sh.Sh. Okilov, A.R. Rashidov

Title of the article: Anodic behavior of Zn-Nb system alloys in a NaCl solution

Year: 2026, Issue: 4, Pages: 98-106

Branch of knowledge: 2.6.1 Metal science and heat treatment of metals and alloys

Index UDK: 620.193.669.5

DOI: 10.26730/1999-4125-2026-4-98-106

Abstract: Modern scientific and technological progress contributes to the rapid development of non-ferrous metallurgy. In the overall production volume of non-ferrous metals widely used in industry, zinc ranks fourth. Due to its specific properties, zinc and its alloys have found extensive application both as structural and non-structural materials. A significant portion of produced metallic zinc is used for coating metal sheets, as well as for manufacturing semi-finished products and shaped castings. In recent years, zinc-based alloys have been widely used to produce cast sacrificial anodes applied to protect marine vessels and structures from corrosion. The expansion of applications for zinc products is creating new challenges for specialists involved in the production and use of new zinc-based alloys. One of the alloying additions used in zinc alloys is niobium. It has been reported that niobium (up to 0.1 wt.%) increases hardness while reducing ductility and corrosion resistance of zinc. The niobium (Nb) content in wrought zinc-based alloys is usually very low and typically reaches up to 0.1-0.3 wt.%. Due to the contradictory data regarding the effect of niobium on the corrosion resistance of zinc, we investigated the influence of niobium additions up to 0.5 wt.% on the corrosion and electrochemical behavior of high-purity zinc in a NaCl solution. The electrochemical behavior of Zn–Nb alloys was studied using the potentiodynamic polarization method at a potential scan rate of 2 mV/s in a NaCl solution. It was established that increasing the niobium concentration leads to a shift of the free corrosion potential, as well as the repassivation and pitting potentials, toward more positive values. An increase in the concentration of chloride ions in the NaCl solution results in a shift of the electrochemical potentials of Zn–Nb alloys toward more negative values. It was shown that the addition of niobium reduces the corrosion rate of zinc in a NaCl medium by 20%.

Key words: Zn-Nb system alloys potentiostatic method NaCl solution corrosion potential pitting potential corrosion rate microstructure

Receiving date: 20.02.2026

Approval date: 01.09.2026

Publication date: 10.09.2026

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