Advancements in enhancing corrosion protection of Mg alloys: A comprehensive review on the synergistic effects of combining inhibitors with PEO coating

Journal of Magnesium and Alloys, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 1, 2024

Magnesium (Mg) alloys are lightweight materials with excellent mechanical properties, making them attractive for various applications, including aerospace, automotive, and biomedical industries. However, the practical application of Mg is limited due to their high susceptibility corrosion. Plasma electrolytic oxidation (PEO), or micro-arc (MAO), a coating method that boosts alloys' corrosion resistance. despite benefits PEO coatings, they can still exhibit certain limitations, such as failing maintain long-term protection result inherent porosity. To address these challenges, researchers have suggested use inhibitors in combination coatings on alloys. Inhibitors chemical compounds be incorporated into applied post-treatment further boost resistance PEO-coated Corrosion inhibitors, whether organic inorganic, act by forming protective barrier, hindering process, modifying surface properties reduce Containers made materials, polyelectrolyte shells, layered double hydroxides, polymer mesoporous inorganic materials. Encapsulating containers fully compatible matrix substrate promising approach incorporation. Laboratory studies shown results, demonstrating significant mitigation, extending service life alloy components aggressive environments, providing self-healing properties. In general, this review presents available information incorporation which lead improved performance demanding environments.

Language: Английский

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Improving the inflammatory-associated corrosion behavior of magnesium alloys by Mn3O4 incorporated plasma electrolytic oxidation coatings

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149016 - 149016

Published: Jan. 24, 2024

Biodegradable magnesium alloys for orthopedic bone fixation have been introduced various fields of application. The corrosion resistance implants weakens in physicochemical environments and is further compromised during post-implantation inflammation. In this study, Mn3O4-incorporated plasma electrolyte oxidation (PEO) coatings were developed on Mg-Zn-Ca substrate through two approaches: the addition KMnO4 salt inclusion Mn3O4 nanoparticles into composition. Incorporating additives electrolytes led to a reduction surface porosity an increase coating thickness both synthesis approaches. electrochemical immersion tests conducted under simulated normal conditions inflammatory conditions, where solutions prepared with hydrogen peroxide (H2O2) hydrochloric (HCl) acid. Both studies revealed that inflammation significantly increased rate uncoated biomaterial, escalating from approximately 2 mm·y-1 16 mm·y-1. Moreover, showed composite PEO coatings, incorporating (MnPR-PEO), demonstrated superior performance among all coated samples. Potentiodynamic polarization results indicated substantial current density, decreasing 73.9 μA·cm−2 basic 5.5 MnPR-PEO coatings. improved attributed their catalytic H2O2 scavenging, suggests promise implants, offering enhanced potential biomedical application benefits.

Language: Английский

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Maximizing the potential applications of plasma electrolytic oxidation coatings produced on Mg-based alloys in anti-corrosion, antibacterial, and photocatalytic targeting through harnessing the LDH/PEO dual structure

Journal of Magnesium and Alloys, Journal Year: 2024, Volume and Issue: 12(7), P. 2674 - 2694

Published: July 1, 2024

There is an increasing interest in the development of Mg alloys, both for industrial and biomedical applications, due to their favorable characteristics such as being lightweight robust. However, inadequate corrosion resistance lack antibacterial properties pose significant challenges necessitating implementation advanced coating engineering techniques. Plasma electrolytic oxidation (PEO) has emerged a preferred technique because its distinctive successful surface modification results. there continuous need further enhancements optimize performance functionalities protective treatments. The integration layered double hydroxide (LDH) into PEO coatings on alloys presents promising approach bolstering properties. This thorough review delves latest developments integrating LDH corrosion-related purposes. It particularly emphasizes improvements resistance, effectiveness, photocatalytic resulting from incorporation coatings. two key mechanisms that enhance containing are anion exchangeability structure pore-sealing effect. Moreover, activity with stemmed release agents stored within structure, alterations pH levels, photothermal conversion property. Furthermore, by incorporating coatings, new opportunities emerge tackling environmental issues through boosted properties, especially realm pollutant degradation.

Language: Английский

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Corrosion behavior amelioration of Ti-based alloys by the hybrid plasma electrolytic oxidation (PEO)/polymer coatings: A review

Hybrid Advances, Journal Year: 2024, Volume and Issue: 5, P. 100151 - 100151

Published: Feb. 9, 2024

Ti and Ti-based alloys are increasingly employed as components for various industrial applications, both structural functional. Forming coatings is one of the potentially highly effective methods to shield products from adverse environmental effects. Among numerous techniques forming on alloys, plasma electrolytic oxidation (PEO) stands out. Coatings produced through PEO exhibit high resistance corrosion, substantial wear, strong adhesion substrate, which attributed formation chemical bonds between underlying material coating. Conversely, may not provide sufficient protection titanium due presence porosity fine cracks. Establishing an organic film coating surface a potent strategy seal defects, thereby inhibiting intrusion corrosive elements into substrate. Applying polymer layer could be approach manage extent damage enhance corrosion. This article reviews latest developments in PEO/polymer composite investigates corrosion characteristics these coatings.

Language: Английский

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Electrolyte and electrolyte-additives for improved plasma electrolytic oxidation on magnesium alloys

Applied Surface Science Advances, Journal Year: 2025, Volume and Issue: 26, P. 100700 - 100700

Published: Jan. 29, 2025

Language: Английский

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Preparation and corrosion resistance characterization of MAO coating on AZ31B magnesium alloy formed in the mixed silicate and phosphate electrolytes with pectin as an additive

Surface and Coatings Technology, Journal Year: 2023, Volume and Issue: 476, P. 130209 - 130209

Published: Nov. 14, 2023

Language: Английский

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Preparation and characterization of micro-arc oxidation biological coatings on magnesium alloys containing graphene oxide

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 482, P. 149064 - 149064

Published: Jan. 26, 2024

Language: Английский

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Enhancing corrosion resistance in Mg‒based alloys through MOF‒incorporated coatings: A comprehensive review

Applied Surface Science Advances, Journal Year: 2024, Volume and Issue: 21, P. 100607 - 100607

Published: May 8, 2024

Mg-based alloys are used in various industrial sectors due to the unique combination of mechanical and biomedical behaviors. However, they challenging terms corrosion protection do not produce a protective oxide layer on their surface. The unregulated rate these restricts application. One strategies that can provide coating prevents direct contact corrosive media with substrates is magnesium its alloys. In recent years, MOF‒MOF-containing coatings have been investigated as means protecting metal against corrosion. results show inhibitors significantly reduced dissolution by affecting kinetics electrochemical reactions greatly increasing resistance. So, useful for resistance Also, anti-corrosion mechanisms performance MOFs matrix discussed accordingly. This review article attempts highlight importance applications enhancing

Language: Английский

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Effect of low concentration electrolytes on the formation and corrosion resistance of PEO coatings on AM50 magnesium alloy

Journal of Magnesium and Alloys, Journal Year: 2024, Volume and Issue: 12(4), P. 1386 - 1405

Published: Jan. 24, 2024

In this paper, the formation process, morphology, and electrochemical performance of PEO coatings on AM50 magnesium alloy prepared in low concentration phosphate, aluminate, phosphate-aluminate electrolytes were systematically studied. The results show that from phosphate have a higher thickness better corrosion resistance properties compared to other electrolytes. mixed slightly thinner thickness, similar coating structure an order magnitude lower value impedance with electrolyte coatings. Coatings aluminate lowest worst which gets close behavior bare under same test conditions. Considering application, single greater potential than However, reducing concentrations forming ions too much has negative influence growth rate.

Language: Английский

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Enhancing wear and corrosion resistance of magnesium alloys through in-situ Al2O3 doping for plasma electrolytic oxidation coating

Materials Today Communications, Journal Year: 2024, Volume and Issue: 38, P. 108234 - 108234

Published: Jan. 28, 2024

Language: Английский

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