Abstract
The widespread use of zinc-aluminum alloys as protective coatings for structures, products, and structures requires studying the effect of various additives in such alloys on their corrosion resistance in various environments. In studying the anode behavior of alloys, potentiodynamic methods are widely used to select methods of protection and increase the stability of anode alloys under given operating conditions. The article presents the results of a potentiodynamic study of the corrosion-electrochemical behavior of Zn5Al alloys doped with manganese in various electrolytes. An increase in the manganese concentration within the studied concentrations leads to a shift in the standard potential and pitting potential to a positive region compared to the initial Zn5Al alloy, which indicates a decrease in the corrosion rate of the studied alloys by 2-2.5 times with respect to the base alloy. An increase in the concentration of chloride ions in the electrolyte leads to a decrease in the electrochemical potentials of corrosion and pitting formation of alloys, which indicates an increase in their anode stability. An increase in the anode stability of the protective coatings of alloys depends on the time spent in an aggressive environment: the longer the time, the lower the rate of anode dissolution.
Highlights
Широкое использование цинк-алюминиевых сплавов в качестве защитных покрытий конструкций, изделий и сооружений требует изучения влияния различных добавок в таких сплавах на их коррозийную устойчивость в различных средах
The widespread use of zinc-aluminum alloys as protective coatings for structures, products, and structures requires studying the effect of various additives in such alloys on their corrosion resistance in various environments
The article presents the results of a potentiodynamic study of the corrosion-electrochemical behavior of Zn5Al alloys doped with manganese in various electrolytes
Summary
Широкое использование цинк-алюминиевых сплавов в качестве защитных покрытий конструкций, изделий и сооружений требует изучения влияния различных добавок в таких сплавах на их коррозийную устойчивость в различных средах. Увеличение анодной устойчивости защитных покрытий сплавов зависит от времени нахождения в агрессивной среде: чем больше время, тем ниже скорость анодного растворения. Потенциодинамическое исследование влияния добавок марганца на анодное поведение цинкалюминиевого сплава Zn5Al проводили в щелочных, кислых и нейтральных средах.
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