Micro-Arc Oxidation Phenomenon for Producing Coatings of AZ31B Mg Alloy Using Na3PO4 with Varying KOH Concentrations and Voltages: A Study
Source abstract
Abstract
Complex salt solution systems are commonly used as electrolytes for microarc oxidation (MAO). To investigate the MAO phenomenon in simple electrolytes and evaluate the efficacy of MAO coatings, an Na3PO4 monosalt solution was used as the MAO electrolyte. In this study, the effects of the voltage and Na3PO4 concentration on the spark discharge phenomenon, thickness, roughness, and corrosion resistance of the coatings were investigated. The results showed that MAO coatings were effectively synthesised at high concentrations and voltages. Furthermore, the addition of KOH to the Na3PO4 monosalt solution resulted in discernible spark discharge and improved the corrosion resistance of the coatings. Thus, an MAO coating can be efficiently prepared using Na3PO4 solution as the electrolyte. In addition, the addition of KOH to the Na3PO4 monosalt solution reduced the voltage required for coating formation and enhanced the corrosion resistance of the coating.
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Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Aluminum Alloys Composites Properties · Corrosion Behavior and Inhibition
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science and Engineering, Zigong 643000, China
School of Environment and Chemical Engineering, Dalian Jiaotong University, Dalian 116000, China
Funding
National Natural Science Foundation of China · National Natural Science Foundation of Sichuan Province · Opening Project Material Corrosion and Protection Key Laboratory of Sichuan Province · Graduate Innovation Fund Program of Sichuan University of Science and Engineering
References (24)
Show source-provided references
1. Micro-arc oxidation of magnesium alloys: A review10.1016/j.jmst.2021.11.053 ↗
2. Advances in microarc oxidation coated AZ31 Mg alloys for biomedical applications10.1016/j.corsci.2014.11.001 ↗
3. Recent progress in surface modification of metals coated by plasma electrolytic oxidation: Principle, structure, and performance10.1016/j.pmatsci.2020.100735 ↗
4. Wang, Z., Cheng, Z., Zhang, Y., Shi, X., Rao, M., and Wu, S. (2022). Effect of voltage on the microstructure and high-temperature oxidation resistance of micro-arc oxidation coatings on AlTiCrVZr refractory high-entropy alloy. Coatings, 13.10.3390/coatings13010014 ↗
5. Hu, Y., Wang, Z., Ai, J., Bu, S., and Liu, H. (2021). Preparation of coating on the titanium surface by micro-arc oxidation to improve corrosion resistance. Coatings, 11.10.3390/coatings11020230 ↗
6. Corrosion resistance and biocompatibility of calcium-containing coatings developed in near-neutral solutions containing phytic acid and phosphoric acid on AZ31B alloy10.1016/j.jallcom.2020.153721 ↗
7. Performance and failure process of green recycling solutions for preparing high degradation resistance coating on biomedical magnesium alloys10.1039/D2GC02638D ↗
8. Effect of electrolyte constituents on properties of anodic coatings of magnesium alloys
9. Research Progress of Microarc Oxidation for Corrosion Prevention of Mg-alloys
10. Effect of the electrolytic solution composition on the performance of micro-arc anodic oxidation films formed on AM60B magnesium alloy10.1016/j.surfcoat.2010.05.043 ↗
11. Sun, S.N., Ye, G., Lu, Z.T., Weng, Y.M., Ma, G.F., and Liu, J.T. (2021). Surface Treatment of Zn-Mn-Mg Alloys by Micro-Arc Oxidation in Silicate-Based Solutions with Different NaF Concentrations. Materials, 14.10.3390/ma14154289 ↗
12. Influence of nanoparticle additions on structure and fretting corrosion behavior of micro-arc oxidation coatings on zirconium alloy10.1016/j.surfcoat.2021.126949 ↗
13. Anodizing of magnesium alloy AZ31 in alkaline solutions with silicate under continuous sparking10.1016/j.corsci.2008.08.038 ↗
14. Biodegradation behavior of micro-arc oxidized AZ31 magnesium alloys formed in two different electrolytes10.1016/j.apsusc.2012.07.105 ↗
15. Characteristics and corrosion resistance of plasma electrolytic oxidation coatings on AZ31B Mg alloy formed in phosphate-silicate mixture electrolytes10.1016/j.corsci.2014.07.038 ↗
16. Effect of KH-550 on the structure and properties of micro-arc oxide films on the surface of AZ31B magnesium alloy
17. Effect of Ferric Citrate on Microstructure and Corrosion Resistance of Micro-arc Oxidation Black Film on Mg-alloy AZ40M
18. Effect of electrolyte additives on anti-corrosion ability of micro-arc oxide coatings formed on magnesium alloy AZ91D10.1016/j.surfcoat.2009.01.032 ↗
19. Anodizing of AZ91D Magnesium Alloy in Borate-Terephthalic Acid Electrolyte10.3866/PKU.WHXB20110931 ↗
20. Effects of voltage on the microstructure and corrosion performance of microarc oxidation coatedAZ31 magnesium alloys
21. Effect of electrical parameters on micromorphology and corrosion Resistance of micro-arc oxidation coating on AZ31B Mg alloy
22. Electrolyte influence on ignition of plasma electrolytic oxidation processes on light metals10.1016/j.surfcoat.2017.02.041 ↗
23. Effect of Electrolyte Concentration on the Structure and Corrosion Resistance of Anodic Films Formed on Magnesium through Plasma Electrolytic Oxidation10.1016/j.electacta.2017.04.110 ↗
24. Fundamentals of electrochemistry(III)-Electrical double layer model and its development