Open AccessPotentiodynamic Study of the Anodic Behavior of Zn5Al Alloy Doped with Manganese
Author(s) -
Рахимов Фируз Акбарович,
Обидов Зиедулло Рахматович,
Амини Реза Наджафабади,
Ганиев Изатулло Наврузович,
Новоженов Владимир Антонович,
Стручева Наталья Егоровна
Publication year - 2020
Publication title -
izvestiâ altajskogo gosudarstvennogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 1561-9451
pISSN - 1561-9443
DOI - 10.14258/izvasu(2020)4-08
Subject(s) - materials science , anode , alloy , corrosion , manganese , electrolyte , electrochemistry , metallurgy , chloride , pitting corrosion , dissolution , doping , galvanic anode , chemical engineering , cathodic protection , electrode , chemistry , optoelectronics , engineering
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.