Corrosion behavior and microstructure of the Al-Al2O3 coatings produced by low pressure cold spraying

J. Villafuerte, D. Dzhurinskiy, R. Ramirez, E. Maeva, V. Leshchynsky, R. Gr Maev

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)

Abstract

Low Pressure Cold Spray (LPCS) was used to produce Al based powder coatings on X80 low carbon steel, AA2024 Al alloy and AZ31 Magnesium alloy substrates. The corrosion protection provided by these coatings was evaluated by electrochemical measurements (polarization curves, electrochemical impedance spectroscopy) in 1M NaCl electrolyte. The microstructures and electrochemical behavior of the Al based coatings were investigated comparing with pure Al. Electrochemical measurements showed that cold sprayed Al-Al2O 3 coatings exhibit: (i) corrosion potential of the Al coating is similar to solid Al, (ii) corrosion potential of the Al-Al2O 3 coatings is comparable as Al, and (iii) change of polarization processes occurs for AI-Al2O3 coatings. The immersion tests revealed dependence of corrosion resistance on Al2O3 content. The electrochemical corrosion mechanisms of the coatings and microstructure were discussed. The coatings show a typical layered cold sprayed material structure.

Original languageEnglish
Title of host publicationExpanding Thermal Spray Performance to New Markets and Applications - Proceedings of the 2009 International Thermal Spray Conference, ITSC 2009
Pages908-913
Number of pages6
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventExpanding Thermal Spray Performance to New Markets and Applications - 2009 International Thermal Spray Conference, ITSC 2009 - Las Vegas, NV, United States
Duration: 4 May 20097 May 2009

Publication series

NameProceedings of the International Thermal Spray Conference

Conference

ConferenceExpanding Thermal Spray Performance to New Markets and Applications - 2009 International Thermal Spray Conference, ITSC 2009
Country/TerritoryUnited States
CityLas Vegas, NV
Period4/05/097/05/09

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