Corrosion resistance of AZ31 magnesium alloy treated by plasma electrolytic oxidation

Kajánek, D.; Hadzima, B.; Tkacz, J.; Pastorková, J.; Jacková, M.; Wasserbauer, J.

doi:10.2478/kom-2019-0008

Abstract

The coating prepared by plasma electrolytic oxidation (PEO) was created on AZ31 magnesium alloy surface with the aim to evaluate its effect on corrosion resistance. The DC current was applied on the sample in solution consisted of 10 g/l Na₃PO₄·12H₂O and 1 g/l KOH. Additional samples were prepared with 2 and 4 minutes of preparation to observe evolution of the PEO coating. Morphology of the coatings was evaluated by scanning electron microscopy and chemical composition was examined by EDX analysis. Electrochemical characteristic were measured by potentiodynamic polarization tests and electrochemical impedance spectroscopy in 0.1 M NaCl at the laboratory temperature. Obtained data were presented in form of potentiodynamic curves and Nyquist diagrams. Results of analysis showed that plasma electrolytic oxidation coating positively influence corrosion resistance of AZ31 magnesium alloy in chosen corrosive environment.

References

1. Antonova O. A. et al. Microstructure and texture of pure magnesium after room-temperature lateral extrusion, Materials Science and Engineering A2017, 26, 319-329.10.1016/j.msea.2017.08.080
Search in Google Scholar Back to article
2. Nový F. et al. Very high cycle fatigue behaviour of as-extruded AZ31, AZ80, and ZK60 magnesium alloys, International Journal of Materials and Research2009, 100, 288-291.10.3139/146.110043
Search in Google Scholar Back to article
3. Homma T., Kunito N., Kamado, S. Fabrication of extraordinary high-strength magnesium alloy by hot extrusion, Scripta Materialia2009, 61, 644-647.10.1016/j.scriptamat.2009.06.003
Search in Google Scholar Back to article
4. Fintová S. et al. Improvement of electrochemical corrosion characteristics of AZ61 magnesium alloy with unconventional fluoride conversion coatings, Surface and Coatings technology2019, 357, 638-650.10.1016/j.surfcoat.2018.10.038
Search in Google Scholar Back to article
5. Curioni M. The behaviour of magnesium during free corrosion andpotentiodynamic polarization investigated by real-time hydrogenmeasurement and optical imaging, Electrochimica Acta2014, 120, 284-292.10.1016/j.electacta.2013.12.109
Search in Google Scholar Back to article
6. Atrens A., Dietzel W. The Negative Difference Effect and Unipositive Mg⁺. In Advanced Engineering Materials, Advanced Engineering Materials2007, 9, 292-297.10.1002/adem.200600275
Search in Google Scholar Back to article
7. Birbilis N. et al. Evidence for enhanced catalytic activity of magnesium arising from anodic activity, Electrochimica Acta2014, 132, 277-283.10.1016/j.electacta.2014.03.133
Search in Google Scholar Back to article
8. Esmaily, M. et al. Fundamentals and advances in magnesium alloy corrosion, Progress in Materials Science2017, 89, 92-193.10.1016/j.pmatsci.2017.04.011
Search in Google Scholar Back to article
9. Mhaede M., Pastorek F., Hadzima B. Influence of shot peening on corrosion properties of biocompatible magnesium alloy AZ31 coated by dicalcium phosphate dihydrate (DCPD), Materials Science and Engineering C2014, 39, 330-335.10.1016/j.msec.2014.03.02324863232
Search in Google Scholar Back to article
10. Darband G.B. et al. Plasma electrolytic oxidation of magnesium and its alloys: Mechanism, properties and applications, Journal of Magnesium and Alloys2017, 5, 74-132.10.1016/j.jma.2017.02.004
Search in Google Scholar Back to article
11. Chang L. et al. Growth regularity of ceramic coating on magnesium alloy by plasma electrolytic oxidation, Journal of Alloys and Compounds2009, 468, 462-465.10.1016/j.jallcom.2008.01.069
Search in Google Scholar Back to article
12. Gu Y. et al. Effect of oxidation time on the corrosion behavior of micro-arc oxidation produced AZ31 magnesium alloys in simulated body fluid, Journal of Alloys and Compounds2012, 543, 109-117.10.1016/j.jallcom.2012.07.130
Search in Google Scholar Back to article
13. Hussein R.O., Northwood D.O., Nie X. The effect of processing parameters and substrate composition on the corrosion resistance of plasma electrolytic oxidation (PEO) coated magnesium alloys, Surface and Coatings Technology2013, 237, 357-368.10.1016/j.surfcoat.2013.09.021
Search in Google Scholar Back to article
14. Kajánek D., Hadzima B., Pastorek F. Electrochemical characterization of AZ31 magnesium alloy treated by ultrasonic impact peening, Komunikácie / Communications – Scientiffic Letters of the University of Žilina2018, 20, 24-29.10.26552/com.C.2018.3.24-29
Search in Google Scholar Back to article
15. Raj X.J., Nishimura T. Studies on galvanic corrosion of iron-magnesium couple by scanning electrochemical microscopy in 0.1 M NaCl solution, Journal of Industrial and Engineering Chemistry2016, 41, 141-150.10.1016/j.jiec.2016.07.020
Search in Google Scholar Back to article
16. Kajánek D. et al. Study of Corrosion Behavior of Dicalcium Phosphate-dihydrate (DCPD) Coating Prepared by Large Amplitude Sinusoidal Voltammetry (LASV) Technique on ZW3, Proceedia Engineering2017, 192, 399-403.10.1016/j.proeng.2017.06.069
Search in Google Scholar Back to article
17. Kajánek D. et al. Electrochemical impedance spectroscopy characterization of ZW3 magnesium alloy coated by DCPD using LASV deposition technique, Acta Metallurgica Slovaca2017, 23, 147-154.10.12776/ams.v23i2.900
Search in Google Scholar Back to article
18. Amirudin A., Thierry D. Application of electrochemical impedance spectroscopy to study the degradation of polymer-coated metals, Progress in Organic Coatings1995, 26, 1-28.10.1016/0300-9440(95)00581-1
Search in Google Scholar Back to article
19. Song G.L. Recent progress in corrosion and protection of magnesiu alloys, Advanced Engineering Materials2005, 7, 563-586.10.1002/adem.200500013
Search in Google Scholar Back to article
20. Liu C. et al. Characterization and corrosion behavior of plasma electrolytic oxidation coated AZ91-T6 magnesium alloy, Surface and Coatings Technology2016, 304, 179-187.10.1016/j.surfcoat.2016.07.021
Search in Google Scholar Back to article
21. Zhou J. et al. Accelerated Degradation Behavior and Cytocompatibility of Pure Iron Treated with Sandblasting, Applied Materials and Interfaces2016, 8, 26482-26492.10.1021/acsami.6b0706827598975
Search in Google Scholar Back to article
22. Hadzima B. et al. Cathodic anticorrosive protection of magnesium alloy AZ91, Kovové materiály2003, 41, 257-269.
Search in Google Scholar Back to article
23. Bagherifard S. et al. Effects of nanofeatures induced by severe shot peening (SSP) on mechanical, corrosion and cytocompatibility properties of magnesium alloy AZ31, Acta Biomaterialia2018, 66, 93-108.10.1016/j.actbio.2017.11.03229183850
Search in Google Scholar Back to article

Corrosion resistance of AZ31 magnesium alloy treated by plasma electrolytic oxidation

Abstract

Paradigm

My account