Modification of chromate-free conversion coatings on aluminum alloy 1105 to increase their protective properties
https://doi.org/10.61852/2949-3412-2025-3-1-73-84
Abstract
Aluminum alloys are in high demand in various industries. In the modern world, when great emphasis is placed on environmental friendliness and the use of recycled resources, alloys based on recycled metal play an advantageous role. Such alloys may differ significantly in the amount of alloying elements. Aluminum alloy 1105, which is made from recycled aluminum, contains Mg and Cu in its composition and is characterized by a high content of impurity elements (Fe, Si, Zn). The intermetallic phases contained in the alloy reduce its corrosion resistance. Modern methods of anticorrosive protection can help the wider spread of alloy 1105 in various designs. Among the various methods, conversion coatings obtained by chemical oxidation are a simple and economical way to protect against corrosion. The aim of this work was to increase the protective properties of chromate-free conversion coatings IFKHANAL-3, by modifying them with nitrates and nitrites. One of the main problems of conversion coatings on aluminum alloy 1105 is their increased defects at the micro level. The use of nitrate and nitrite compounds provides a more effective formation of a conversion coating on the surface of the alloy, which makes it possible to enhance their corrosion resistance.
About the Authors
D. O. Chugunov
Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky prospekt, 119071, Moscow
Yu. A. Kuzenkov
Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky prospekt, 119071, Moscow
S. Yu. Rybakov
Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky prospekt, 119071, Moscow
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Review
For citations:
Chugunov D.O., Kuzenkov Yu.A., Rybakov S.Yu. Modification of chromate-free conversion coatings on aluminum alloy 1105 to increase their protective properties. Title in english. 2025;(1):73-84. (In Russ.) https://doi.org/10.61852/2949-3412-2025-3-1-73-84
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