Ultrathin Conversion Coatings on AMg3 Aluminum Alloy. Part 1. Optimization of the Coating-Fabrication Process

—The decrease of the corrosion resistance of aluminum alloys of different doping systems results from their phase and surface heterogeneity. Operation in environments of various aggressiveness contributes to the emergence of local types of corrosion damage on aluminum alloys. This results in prematu...

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Published in:Protection of metals and physical chemistry of surfaces 2022-12, Vol.58 (7), p.1295-1300
Main Authors: Kuzenkov, Yu. A., Oleinik, S. V., Nyrkov, N. P., Arkhipushkin, I. A.
Format: Article
Language:English
Subjects:
Alloys
Aluminum alloys
Aluminum base alloys
Ammonium nitrate
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromate coatings
Chromating
Conversion coatings
Corrosion
Corrosion and Coatings
Corrosion inhibitors
Corrosion resistance
Heterogeneity
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Metallic Materials
Molybdenum
Optimization
Protective Coatings
System effectiveness
Tribology
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container_end_page 1300
container_issue 7
container_start_page 1295
container_title Protection of metals and physical chemistry of surfaces
container_volume 58
creator Kuzenkov, Yu. A.
Oleinik, S. V.
Nyrkov, N. P.
Arkhipushkin, I. A.
description —The decrease of the corrosion resistance of aluminum alloys of different doping systems results from their phase and surface heterogeneity. Operation in environments of various aggressiveness contributes to the emergence of local types of corrosion damage on aluminum alloys. This results in premature failure of metal structures. A rather wide range of coatings are used to protect aluminum alloys, among which conversion coatings occupy a significant share due to their production effectiveness and compatibility with many paint systems. In this regard, the possibility of fabrication of submicron protective conversion coatings on AMg3 aluminum alloy in molybdenum converting media has been studied in this work. Electrochemical studies have shown that the addition of ammonium nitrate to the molybdenum-converting compound does not affect subsequent treatment (filling) of the resulting coatings in a corrosion-inhibitor solution. The optimal time for fabrication of coatings and its subsequent filling has been revealed. It has been shown that the studied molybdenum-conversion coatings are similar in protective properties to the traditional chromate coating.
doi_str_mv 10.1134/S2070205122070073
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subjects Alloys
Aluminum alloys
Aluminum base alloys
Ammonium nitrate
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromate coatings
Chromating
Conversion coatings
Corrosion
Corrosion and Coatings
Corrosion inhibitors
Corrosion resistance
Heterogeneity
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Metallic Materials
Molybdenum
Optimization
Protective Coatings
System effectiveness
Tribology
title Ultrathin Conversion Coatings on AMg3 Aluminum Alloy. Part 1. Optimization of the Coating-Fabrication Process
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