Article 4115

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Chugunov Denis Borisovich, Postgraduate student, Ogarev Mordovia State University (68a Bolshevistskaya street, Saransk, Russia),
Kljuchagina Alina Nikolaevna, Engineer, laboratory of analytical chemistry, Ogarev Mordovia State University (68a Bolshevistskaya street, Saransk, Russia),
Osipov Anatolij Konstantinovich, Candidate of chemical sciences, associate professor, head of sub-department of analytical chemistry, Ogarev Mordovia State University (68a Bolshevistskaya street, Saransk, Russia),
Meshkov Leonid Leonidovich, Doctor of chemical sciences, professor, sub-department of general chemistry, Lomonosov Moscow State University (1 Leninskie gory street, Moscow, Russia),

Index UDK

546.05:54-19:[546.62+546.56+546.72+ 546.762]


Background. The study of the corrosion behavior of Al–Cu–Fe–Cr system with composition close to the quasicrystalline is highly relevant because of the high interest in recent years to a quasi-periodic structure, to useful properties for usage in various industries. The aim of this study is to elucidate the mutual influence of components and phase structural components of aluminum alloys with copper and iron on their anodic behavior in acidic and alkaline solutions.
Materials and methods. The starting materials were Al electrolytic of 99,9 % purity, electrolytic copper (99,9 %) and carbonyl iron of 99 % purity. Test samples were sealed in plastic and had a working surface area of 0,096 cm2. To study the electrochemical behavior and corrosion resistance of Al–Cu–Fe–Cr used the potentiodynamic method using a three-electrode cell – Dr. Bob's Cell. The volume of the electrolyte used for the analysis was 30 ml. Anodic polarization curves were studied in 3 % sodium chloride, sulfuric acid and hydrochloric acid using a potentiostat Gamry Reference 3000 at potential sweep rate of 1,5 mV/s. As a reference electrode the authors used a silver chloride electrode filled with a saturated solution of potassium chloride and platinum as an auxiliary electrode. The alloys were prepared by arc melting in an argon atmosphere [1]. To determine the concentration of the individual components of the alloy, passed into the solution, the authors used an atomic absorption spectrometer Shimadzu AA-7000.
Results. In the framework of the experiment on the electrochemical behavior of samples of Al–Cu–Fe–Cr the authors obtained anodic polarization curves by the potentiodynamic method in acidic and neutral solutions. The researchers studied the influence of pH on the corrosion performance of the alloys. It was found that in a sample with a high content of copper the corrosion rate is the lowest among all test environments.
Conclusions. It is shown that in all electrolytes the corrosion characteristics of alloys are different. The highest activity is observed in a 3 % solution of HCl, and the lowest in solution of H2SO4. The authors studied the effect of the composition on the electrochemical dissolution of alloys.

Key words

anodic dissolution of alloys, corrosion, physical and chemical analysis, electrode, electrochemical potential, quasicrystals.

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Дата создания: 05.05.2015 10:34
Дата обновления: 05.05.2015 14:31