Atmospheric Pressure Plasma Treatment of Magnesium Alloy for Enhanced Coating Adhesion and Corrosion Resistance
Source abstract
Abstract
Atmospheric pressure plasma (AP) treatment, using an open-air jet of ionized CO2, N2, or air, was applied to AZ91D Mg alloy surfaces to investigate its effects on primer coating adhesion and corrosion resistance. The CO2 and air AP treatments formed an O- and C-rich surface layer (Mg-O-C) consisting of agglomerated nanoparticles and pits with a depth of a few microns and increasing the surface roughness by 6–8 times compared with the reference 600 grit-finished surface. Then, three commercial primers, zinc phosphate (ZnP), chromate-containing epoxy, and MIL23377, were applied on the treated surfaces to evaluate the corrosion resistance associated with the coating adhesion. Microscopic analysis demonstrated stronger interlocking between the primer layer and the nano-/microrough Mg-O-C surface compared to the untreated (600 grit-finished) surfaces, indicating improved coating adhesion and corrosion resistance. Crosscut tests of the MIL23377 primer on the CO2 and air AP-treated surfaces showed the highest level of adhesion, ASTM class 5B. Salt spray corrosion tests showed that after 8 days of exposure, the primer coatings on air AP-treated surfaces had corrosion areas that were more than four times smaller than that of the 600 grit-finished surface. The N2 AP treatment showed similar adhesion enhancement. The preliminary operation expenses for AP treatment using CO2, N2, and air were estimated at USD 30.62, USD 35.45, and USD 29.75 (from an air cylinder)/USD 0.66 (from an air compressor) per m2, respectively.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Aluminum Alloys Composites Properties · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Manufacturing Science Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN 37831, USA
Materials Science and Technology Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN 37831, USA
Center for Nanophase Materials Science and Neutron Scattering Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN 37831, USA
Funding
US Department of Energy (DOE) Office of Energy Efficiency and the Renewable Energy Vehicle Technologies Office’s Light Metals Core Program · DOE Office of Technology Transitions’ Technology Commercialization Fund
References (42)
Show source-provided references
1. Czerwinski, F. (2021). Current Trends in Automotive Lightweighting Strategies and Materials. Materials, 14.10.3390/ma14216631 ↗
2. A review on environment friendly and lightweight Magnesium-Based metal matrix composites and alloys10.1016/j.matpr.2020.07.424 ↗
3. Towards magnesium alloys for high-volume automotive applications10.1016/j.scriptamat.2016.07.035 ↗
4. Insights from a Recent Meeting: Current Status and Future Directions in Magnesium Corrosion Research10.5006/2255 ↗
5. Corrosion and corrosion testing of magnesium alloys10.1002/maco.200704091 ↗
6. Corrosion avoidance in lightweight materials for automotive applications10.1038/s41529-018-0045-2 ↗
7. A high-specific-strength and corrosion-resistant magnesium alloy10.1038/nmat4435 ↗
8. Vaghefinazari, B., Wierzbicka, E., Visser, P., Posner, R., Arrabal, R., Matykina, E., Mohedano, M., Blawert, C., Zheludkevich, M., and Lamaka, S. (2022). Chromate-Free Corrosion Protection Strategies for Magnesium Alloys-A Review: PART I-Pre-Treatment and Conversion Coating. Materials, 15.10.3390/ma15238676 ↗
9. Dzikova, J., Fintova, S., Kajanek, D., Florkova, Z., Wasserbauer, J., and Dolezal, P. (2021). Characterization and Corrosion Properties of Fluoride Conversion Coating Prepared on AZ31 Magnesium Alloy. Coatings, 11.10.3390/coatings11060675 ↗
10. Anodization of magnesium for biomedical applications—Processing, characterization, degradation and cytocompatibility10.1016/j.actbio.2017.08.017 ↗
11. Simchen, F., Sieber, M., Mehner, T., and Lampke, T. (2020). Characterisation Method of the Passivation Mechanisms during the pre-discharge Stage of Plasma Electrolytic Oxidation Indicating the Mode of Action of Fluorides in PEO of Magnesium. Coatings, 10.10.3390/coatings10100965 ↗
12. Studies on influence of zinc immersion and fluoride on nickel electroplating on magnesium alloy AZ91D10.1016/j.apsusc.2009.04.169 ↗
13. Enhanced corrosion resistance of cold-sprayed and shot-peened aluminum coatings on LA43M magnesium alloy10.1016/j.surfcoat.2020.125865 ↗
14. Microstructure and Corrosion Behavior of Thermal-Sprayed Hydroxyapatite/Magnesium Composite Coating on the Surface of AZ91D Magnesium Alloy10.1007/s11666-018-0815-y ↗
15. Transparent superhydrophobic surfaces using a spray coating process10.1016/j.solmat.2017.10.029 ↗
16. Transparent superhydrophilic and superhydrophobic nanoparticle textured coatings: Comparative study of anti-soiling performance10.1039/C8NA00349A ↗
17. The anti-soiling performance of highly reflective superhydrophobic nanoparticle-textured mirrors10.1039/C8NR03024C ↗
18. Recent progress in superhydrophobic and superamphiphobic coatings for magnesium and its alloys10.1016/j.jma.2021.01.005 ↗
19. The study of a Mg-rich epoxy primer for protection of AZ91D magnesium alloy10.1016/j.corsci.2010.09.008 ↗
20. Lu, X.Y., Sun, S.C., Fan, Q.Q., Pei, X.J., Dun, Y.C., Feng, X.G., Zou, C., and Lu, W. (2019). Investigation of Protective Performance of a Mg-Rich Primer Containing Aluminum Tri-Polyphosphate on AZ91D Magnesium Alloy in Simulated Acid Rain. Coatings, 9.10.3390/coatings9100649 ↗
21. Akafuah, N.K., Poozesh, S., Salaimeh, A., Patrick, G., Lawler, K., and Saito, K. (2016). Evolution of the Automotive Body Coating Process-A Review. Coatings, 6.10.3390/coatings6020024 ↗
22. Effect of grit-blasting on the surface energy of graphite/epoxy composites10.1080/00218460500418516 ↗
23. Atmospheric air plasma jet for improvement of paint adhesion to aluminium surface in industrial applications10.1016/j.ijadhadh.2020.102554 ↗
24. Atmospheric pressure plasma enhanced chemical vapor deposition of hydrophobic coatings using fluorine-based liquid precursors10.1016/j.surfcoat.2013.03.028 ↗
25. Experimental Investigation into the Effect of Adhesion Properties of PEEK Modified by Atmospheric Pressure Plasma and Low Pressure Plasma10.1002/app.31880 ↗
26. Improving adhesion of powder coating on PEEK composite: Influence of atmospheric plasma parameters10.1016/j.apsusc.2015.09.148 ↗
27. Wu, C.C., Demaree, J.D., Weerasooriya, A., Bujanda, A., and Robinette, E.J. (2022). Enhanced Interfacial Adhesion of Nylon 66 to Epoxy Resin EPON 825 by Non-thermal Atmospheric Pressure Dielectric Barrier Discharge Plasmas. Coatings, 12.10.3390/coatings12070919 ↗
28. Aluminum metal surface cleaning and activation by atmospheric-pressure remote plasma10.1016/j.apsusc.2017.02.092 ↗
29. Assessment of atmospheric plasma treatment cleaning effect on steel surfaces10.1016/j.surfcoat.2013.10.036 ↗
30. Favaro, M., Patelli, A., Ceccato, R., Dire, S., Callone, E., Fredi, G., and Quaranta, A. (2021). Thin Films of Plasma-Polymerized n-Hexane and ZnO Nanoparticles Co-Deposited via Atmospheric Pressure Plasma Jet. Coatings, 11.10.3390/coatings11020167 ↗
31. Formation of carbon and oxygen rich surface layer on high purity magnesium by atmospheric carbon dioxide plasma10.1016/j.jma.2022.10.008 ↗
32. Plasma Surface Engineering: An Enabling Technology Designed to Clean and Protect Printed Circuit Boards10.4071/2380-4505-2020.1.000197 ↗
33. (2016). Standard Practice for Operating Salt Spray (Fog) Apparatus (Standard No. ASTM B117-16).
34. KUB (2022, June 14). Business Electric Rates as of May 2022. Available online: https://www.kub.org/bills-payments/understand-your-bill/business-rates/business-electric-rate-schedules/.
35. (2022, April 05). Industrial Grade Carbon Dioxide, 50 Pound High Pressure Steel Cylinder, CGA-320. Available online: https://www.airgas.com/product/Gases/Carbon-Dioxide/p/CD%2050S.
36. (2022, September 26). Industrial Grade Nitrogen, Size 300 High Pressure Steel Cylinder, CGA-580. Available online: https://www.airgas.com/product/Gases/Nitrogen/p/NI%20300.
37. (2023, February 02). Breathing Grade Air, Size 300 High Pressure Steel Cylinder, CGA-346. Available online: https://www.airgas.com/p/AI%20B300.
38. (2023, February 14). MSG® Centac® C400 Centrifugal Air Compressor. Available online: https://www.ingersollrand.com/en-us/air-compressor/centrifugal-air-compressors/45-70-m3min-1600-2350-cfm.
39. Progress in MgO sorbents for cyclic CO2 capture: A comprehensive review10.1039/C9TA06930E ↗
40. Association, E. (2023, January 04). Applied Costs of Electrocoating. Available online: https://electrocoat.wildapricot.org/resources/Pictures/ECA_CostsBrochure_EmailPages.pdf.
41. Kurczewski, N. (2023, January 04). How Much Does It Cost to Paint a Car?. Available online: https://www.caranddriver.com/features/a27438340/cost-to-paint-car/.
42. Jackson, L. (2023, January 04). Why there won’t be a solar powered car. The Washington Times, 26 July 2008. Available online: https://www.washingtontimes.com/blog/spinning-wheels-community-car-lovers/2008/jul/26/why-there-wont-be-a-solar-powered-car/.