Harnessing superhydrophobic coatings for enhancing the surface corrosion resistance of magnesium alloys

Gu, Ruolei; Shen, Jie; Hao, Qing; Zu, Tingting; Li, Dan; Hu, Liang; Hong, Chang

doi:10.1039/d1tb01974k

Cited by 20 publications

(10 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After modification with SA, an SHPS with a θ c of about 167.7 ± 0.05° was obtained. Gu et al (2021) prepared a rough polydopamine layer on Mg alloy by dipping it in a dopamine solution. Then the SHPS ( θ c ∼ 152°) was created by immersing the sample into a solution containing hydrophobic nano-SiO 2 particles.…”

Section: Superhydrophobic Surfaces On Mg Alloymentioning

confidence: 99%

Progress in superhydrophobic surfaces for corrosion protection of Mg alloys – a mini-review

Song,

Xie,

Ding

et al. 2024

ACMM

View full text Add to dashboard Cite

Purpose This paper aims to comprehensively review the preparation methods of superhydrophobic surfaces (SHPS) for corrosion protection of Mg alloy in recent years. Design/methodology/approach The preparation methods, wettability and corrosion resistance of SHPS on Mg alloy in the past three years are systematically described in this paper. Findings Two types of SHPS, including single-layer and multilayer coatings for corrosion protection of Mg alloy are summarized. Preparing multilayered coatings with multifunction is the current trend in developing SHPS on Mg alloy. Originality/value This paper reviewed the preparation methods and corrosion resistance of SHPS on Mg alloys. It provides a valuable reference for researchers to develop highly durable SHPS with excellent corrosion resistance for Mg alloys.

show abstract

Section: Superhydrophobic Surfaces On Mg Alloymentioning

confidence: 99%

Progress in superhydrophobic surfaces for corrosion protection of Mg alloys – a mini-review

Song,

Xie,

Ding

et al. 2024

ACMM

View full text Add to dashboard Cite

show abstract

“…[107,108] SiO 2 -F NPs dispersed uniformly in PDA coating may form a stable superhydrophobic surface with a WCA of 155°and thereby prevent the infiltration of inorganic ions such as Cl − , thus decreasing the corrosion current by an order of magnitude (8.084 × 10 −6 A cm −2 ) compared with undoped coated samples (1.218 × 10 −5 A cm −2 ). [109] Third, impregnating NPs that have small particle sizes (such as nBG, ZnO NPs, and Ce-HA NPs) [26,97,104] on the surface of organic fibers may increase fiber diameter, improve surface chemistry, and reduce fiber gaps, thereby impeding the deposition and penetration of corrosive ions. For example, nBG increased the diameter of PCL nanofibers used to coat an AZ91 Mg alloy surface and thereby enhanced the interception of corrosive products and ions.…”

Section: Improving Corrosion Resistance To Control the Degradation Ra...mentioning

confidence: 99%

Composite Nanocoatings of Biomedical Magnesium Alloy Implants: Advantages, Mechanisms, and Design Strategies

Dai

Xiong

et al. 2023

Advanced Science

Self Cite

View full text Add to dashboard Cite

The rapid degradation of magnesium (Mg) alloy implants erodes mechanical performance and interfacial bioactivity, thereby limiting their clinical utility. Surface modification is among the solutions to improve corrosion resistance and bioefficacy of Mg alloys. Novel composite coatings that incorporate nanostructures create new opportunities for their expanded use. Particle size dominance and impermeability may increase corrosion resistance and thereby prolong implant service time. Nanoparticles with specific biological effects may be released into the peri‐implant microenvironment during the degradation of coatings to promote healing. Composite nanocoatings provide nanoscale surfaces to promote cell adhesion and proliferation. Nanoparticles may activate cellular signaling pathways, while those with porous or core–shell structures may carry antibacterial or immunomodulatory drugs. Composite nanocoatings may promote vascular reendothelialization and osteogenesis, attenuate inflammation, and inhibit bacterial growth, thus increasing their applicability in complex clinical microenvironments such as those of atherosclerosis and open fractures. This review combines the physicochemical properties and biological efficiency of Mg‐based alloy biomedical implants to summarize the advantages of composite nanocoatings, analyzes their mechanisms of action, and proposes design and construction strategies, with the purpose of providing a reference for promoting the clinical application of Mg alloy implants and to further the design of nanocoatings.

show abstract

“…In addition, air bubbles generated from corrosive actions can cause local alkalinity in the in vivo environment, limiting their clinical application. − Several studies have shown that the preparation of a superhydrophobic surface on the surface of magnesium alloy can form a thin air layer between the liquid and the metal to reduce the contact area between the corrosive liquid and the surface of magnesium alloy. The formation and presence of the thin layer can effectively prevent the corrosion of the substrate by body fluids and prolong the service life. − Therefore, preparing superhydrophobic surfaces on the surface of medical magnesium alloys has become a critical research field in recent times.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Laser Preparation of Terracotta Warrior-like Pit Superhydrophobic Structure on Magnesium Alloy with Mechanical Durability and Corrosion Resistance

Cao

Yang

et al. 2023

Langmuir

View full text Add to dashboard Cite

Magnesium alloys are among the most promising materials for medical implants, and by preparing a superhydrophobic surface, the rate of corrosion can be effectively slowed down and durability be improved. However, the anticorrosion surfaces are inevitable to be damaged for the conventional micro−nanostructured superhydrophobic magnesium alloys, which highly limits their application prospects. This work proposes the development of a Terracotta Warrior pit superhydrophobic structure (TWPSS), consisting of a wall structure with a Terracotta Warrior-like pit and a lotus-like surface papillae structure within the wall. For the first time, top-down laser ablation of the pits to prepare the lotus-like surface papilla structure is used in conjunction with a bottom-up laser-guided melt stacking of the raised wall structure to achieve rapid fabrication of a TWPSS on a magnesium alloy surface. The Cassie−Baxter-based design of the wall structure spacing effectively protects the internal lotus-like surface papillae from damage and the disappearance of low surface energy material, and the results show that the superhydrophobic surfaces of magnesium alloys have excellent mechanical durability and repairability. In addition, it was found that the recast layer and laser melting stacked layers produced on the surface of the alloy during femtosecond laser processing refined the grain size of the magnesium alloy and effectively suppressed the corrosion rate. The combination of the superhydrophobic gas layer and the resulting grain refinement slowed down the corrosion of the magnesium alloy. Thus, the rapid preparation of TWPSS structures with mechanical durability and corrosion resistance by femtosecond lasers expands the clinical applications of superhydrophobic surface magnesium alloys in medical devices.

show abstract

Harnessing superhydrophobic coatings for enhancing the surface corrosion resistance of magnesium alloys

Abstract: A superhydrophobic Mg alloy was obtained by depositing SiO2-F NPs in the presence of PDA, presenting excellent capability against corrosion.

Cited by 20 publications

References 44 publications

Progress in superhydrophobic surfaces for corrosion protection of Mg alloys – a mini-review

Progress in superhydrophobic surfaces for corrosion protection of Mg alloys – a mini-review

Composite Nanocoatings of Biomedical Magnesium Alloy Implants: Advantages, Mechanisms, and Design Strategies

Femtosecond Laser Preparation of Terracotta Warrior-like Pit Superhydrophobic Structure on Magnesium Alloy with Mechanical Durability and Corrosion Resistance

Contact Info

Product

Resources

About