Corrosion Behaviour of Preserved PEO Coating on AZ31 Magnesium Alloy

https://doi.org/10.26552/com.C.2021.2.B76-B88

  • Filip Pastorek University of Žilina
  • Milan Štrbák
  • Daniel Kajánek
  • Martina Jacková
  • Jana Pastorková
  • Zuzana Florková
Keywords: Plasma electrolytic oxidation, magnesium alloy, inhibitor, surface treatment, corrosion, electrochemical techniques

Abstract

A surface treatment process, composed of plasma electrolytic oxidation (PEO) and sealing by temporary oil preservation system containing corrosion inhibitors, was performed on AZ31 magnesium alloy in order to improve its corrosion resistance in environments containing chlorides. Both atmospheric and immersion conditions were evaluated by electrochemical tests in 0.1M NaCl solution together with salt spray test according to STN EN ISO 9227 standard. The obtained results confirmed significant improvement of corrosion resistance reached by the PEO sealing in aggressive environments compared to the pure PEO coating on AZ31 surface. Hence, such a duplex coating is a very perspective alternative for magnesium alloy applications in severe conditions or for temporary protection of magnesium products coated by the PEO during marine transport.

Author Biographies

Filip Pastorek, University of Žilina

University of Zilina, Zilina, Slovakia

Milan Štrbák

University of Zilina, Zilina, Slovakia

Daniel Kajánek

University of Zilina, Zilina, Slovakia

Martina Jacková

University of Zilina, Zilina, Slovakia

Jana Pastorková

University of Zilina, Zilina, Slovakia

Zuzana Florková

University of Zilina, Zilina, Slovakia

Published
2020-12-16
How to Cite
Pastorek, F., Štrbák, M., Kajánek, D., Jacková, M., Pastorková, J., & Florková, Z. (2020). Corrosion Behaviour of Preserved PEO Coating on AZ31 Magnesium Alloy. Communications - Scientific Letters of the University of Zilina, 23(2), B76-B88. https://doi.org/10.26552/com.C.2021.2.B76-B88
Section
Mechanical Engineering in Transport