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Anticorrosive Zr-containing Sol-gel Сoatings on AA5056 Aluminum Alloy
https://doi.org/10.31615/j.corros.prot.2024.114.4-1
Abstract
Due to the high toxicity of chromating solutions, which include highly toxic hexavalent chromium compounds, and the conversion coatings formed in them, laws have been adopted in most countries restricting or completely prohibiting the use of Cr(VI) compounds in mechanical engineering and electronics products. This publication is devoted to the development of the process of applying a protective sol-gel zirconiumcontaining coating to the surface of the aluminum alloy AA5056. The optimization of the process parameters for the deposition of a functional sol-gel coating was carried out, the physicochemical and mechanical properties of the coating, which could become an alternative to toxic chromate coatings, were investigated. During the work, it was found that the Zr-containing sol-gel coating is comparable in abrasion resistance to chromate films. The results of polarization measurements showed that the application of a multilayer sol-gel coating improves its protective ability. The increase in protective ability is also confirmed by exposure in the salt mist chamber. The time until the first signs of corrosion appear is 435 hours.
About the Authors
O. A. Shloma
Dmitry Mendeleev University of Chemical Тесhnоlоgy of Russia (MUCTR)
Russian Federation
Russian Federation
Oksana A. Shloma - graduate student
9, Miusskaya square, Moscow, 125047
A. A. Abrashov
Dmitry Mendeleev University of Chemical Тесhnоlоgy of Russia
Russian Federation
Russian Federation
Alexey A. Abrashov - Ph.D. in Technical Sciences, associate Professor
9, Miusskaya square, Moscow, 125047
N. N. Gavrilova
Dmitry Mendeleev University of Chemical Тесhnоlоgy of Russia
Russian Federation
Russian Federation
Natalia N. Gavrilova, Doctor of Chemistry, associate Professor
9, Miusskaya square, Moscow, 125047
O. V. Zhilina
Dmitry Mendeleev University of Chemical Тесhnоlоgy of Russia
Russian Federation
Russian Federation
Olga V. Zhilina - Ph.D. in Chemistry, associate Professor
9, Miusskaya square, Moscow, 125047
N. S. Grigoryan
Dmitry Mendeleev University of Chemical Тесhnоlоgy of Russia
Russian Federation
Russian Federation
Nelya S. Grigoryan - Ph.D. in Chemistry, associate Professor
9, Miusskaya square, Moscow, 125047
E. V. Novikov
Dmitry Mendeleev University of Chemical Тесhnоlоgy of Russia
Russian Federation
Russian Federation
Egor V. Novikov - student
9, Miusskaya square, Moscow, 125047
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Review
For citations:
Shloma O.A., Abrashov A.A., Gavrilova N.N., Zhilina O.V., Grigoryan N.S., Novikov E.V. Anticorrosive Zr-containing Sol-gel Сoatings on AA5056 Aluminum Alloy. Theory and Practice of Corrosion Protection. 2024;29(4):6-17. (In Russ.) https://doi.org/10.31615/j.corros.prot.2024.114.4-1
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