Modification of ultrathin conversion coatings for AMg3 aluminum alloy and their interaction with painting system
Abstract
For applying a painting system on the surface of aluminum alloys, special primers are formed, including the method of chemical oxidation. Primers should serve as adhesion promoters and provide additional anti-corrosion protection. In the present work, ultrathin conversion primer coatings were obtained in the environmentally friendly IFKhANAL-2M converting composition based on molybdates and phosphates. To improve the protective and adhesive properties of the coatings, they were modified by changing the converting composition and subsequent filling of the coatings in a corrosion inhibitor solution. Among the studied modifying additives, 1,2,3– benzotriazole (BTA) showed the best result. Coatings obtained in a solution with the addition of BTA effectively adsorb the corrosion inhibitor at the stage of coating filling, show good protective properties during corrosion tests in a humidity chamber and high adhesion parameters of painting system. In terms of these properties, they are close to traditional primers obtained in chromate conversion compositions.
About the Authors
Y. A. Kuzenkov
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
A. S. Konovalov
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
O. Y. Grafov
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
A. Y. Luchkin
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninsky pr. 31, 119071 Moscow
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Review
For citations:
Kuzenkov Y.A., Konovalov A.S., Grafov O.Y., Luchkin A.Y. Modification of ultrathin conversion coatings for AMg3 aluminum alloy and their interaction with painting system. Title in english. 2023;(2):37-48. (In Russ.)
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