Production of ceramic layers on aluminum alloys by plasma electrolytic oxidation in alkaline silicate electrolytes

Alex Lugovskoy, Aleksey Kossenko, Barbara Kazanski, Michael Zinigrad

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


Plasma electrolytic oxidation (PEO) is a technology allowing obtaining hard wear- and corrosion-resistant in the form of thick and highly-adhesive oxide layer on aluminum surfaces. The process can be performed in several types of electrolyte, of which the alkaline silicate electrolytes were employed in this study. Silicate electrolytes passivate aluminum alloys, favor micro-arc discharges and contain silicate ions, which modify the technological properties of the coating. The influence of the silicate index of sodium silicates and of their concentration in the electrolyte on the composition, structure and properties of the oxide layer was studied. Electrolyte properties, electrochemical process parameters and the properties of the resulting coating were studied and compared. Optimal electrolyte compositions for the obtaining of hard and corrosion resistant ceramic layer were found. A plausible mechanism of the process was proposed.

Original languageEnglish
Title of host publicationMaterials Processing and Interfaces
PublisherMinerals, Metals and Materials Society
Number of pages7
ISBN (Print)9781118296073
StatePublished - 2012
Event141st Annual Meeting and Exhibition, TMS 2012 - Orlando, FL, United States
Duration: 11 Mar 201215 Mar 2012

Publication series

NameTMS Annual Meeting


Conference141st Annual Meeting and Exhibition, TMS 2012
Country/TerritoryUnited States
CityOrlando, FL


  • Aluminum alloys
  • Corrosion protection
  • Oxide layer
  • Plasma electrolytic oxidation


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