Hydrophobic Modification of Magnesium Hydroxide Coating Deposited Cathodically on Magnesium Alloy and its Corrosion Protection

Zhang, Yongjun; Cao, Hui; Huang, Han‐Xiong; Wang, Zhiping

doi:10.3390/coatings9080477

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…As a result, the future focus may be on enhancing the barrier effect and binding force for a full-life corrosion-resistant service. In this regard, composite coating may be a viable option for increasing the adhesion force of organic biopolymer coating [117][118][119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][134]. Furthermore, the formation of composite coatings not only improves corrosion resistance but also endows the Mg alloys with potential bioactivity and biocompatibility in long-term tests.…”

Section: Discussionmentioning

confidence: 99%

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

et al. 2021

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The development of biodegradable implants is certainly intriguing, and magnesium and its alloys are considered significant among the various biodegradable materials. Nevertheless, the fast degradation, the generation of a significant amount of hydrogen gas, and the escalation in the pH value of the body solution are significant barriers to their use as an implant material. The appropriate approach is able to solve this issue, resulting in a decrease the rate of Mg degradation, which can be accomplished by alloying, surface adjustment, and mechanical treatment. Surface modification is a practical option because it not only improves corrosion resistance but also prepares a treated surface to improve bone regeneration and cell attachment. Metal coatings, ceramic coatings, and permanent polymers were shown to minimize degradation rates, but inflammation and foreign body responses were also suggested. In contrast to permanent materials, the bioabsorbable polymers normally show the desired biocompatibility. In order to improve the performance of drugs, they are generally encapsulated in biodegradable polymers. This study summarized the most recent advancements in manufacturing polymeric coatings on Mg alloys. The related corrosion resistance enhancement strategies and future potentials are discussed. Ultimately, the major challenges and difficulties are presented with aim of the development of polymer-coated Mg-based implant materials.

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Section: Discussionmentioning

confidence: 99%

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

et al. 2021

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“…A magnification (×20,000) of zones (Figure 1c,d) suggested that there is air, probably trapped inside the micro/nanostructures of the coating, which could reduce the contact between aggressive substances and alloy surface in the air sites, providing corrosion resistance to the alloy [62]. Table 3.…”

Section: Sem-eds Analysismentioning

confidence: 99%

“…EDS elemental analysis (wt.%) of several randomly selected zone areas (Figure 1) of the PS-ZrO 2 -AM60-AlN (Zones 1-2) and PS-ZrO 2 -AM60 (Zones 3-4) tested samples. A magnification (×20,000) of zones (Figure 1c,d) suggested that there is air, probably trapped inside the micro/nanostructures of the coating, which could reduce the contact between aggressive substances and alloy surface in the air sites, providing corrosion resistance to the alloy [62].…”

Section: Sem-eds Analysismentioning

confidence: 99%

Hybrid Coating of Polystyrene–ZrO2 for Corrosion Protection of AM Magnesium Alloys

et al. 2023

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A hybrid material of polystyrene (PS)–ZrO2 was developed by the sol–gel technique and deposited by spin-coating on AM60 and AM60–AlN nanocomposite surfaces to enhance corrosion resistance in marine environments. PS–ZrO2 with an average thickness of ≈305 ± 20 nm was dispersed homogeneously, presenting isolated micro–nano-structure defects with air trapped inside, which led to an increase in roughness (≈4 times). The wettability of the coated substrates was close to the hydrophobic border (θCA=90°–94°). The coated samples were exposed for 30 days to SME solution, simulating the marine–coastal ambience. The initial pH = 7.94 of the SME shifted to more alkaline pH ≈ 8.54, suggesting the corrosion of the Mg matrix through the coating defects. In the meantime, the release of Mg2+ from the PS–ZrO2-coated alloy surfaces was reduced by ≈90% compared to that of non-coated. Localized pitting attacks occurred in the vicinity of Al–Mn and β-Mg17Al12 cathodic particles characteristic of the Mg matrix. The depth of penetration (≈23 µm) was reduced by ≈85% compared to that of non-coated substrates. The protective effect against Cl ions, attributed to the hybrid PS–ZrO2-coated AM60 and AM60–AlN surfaces, was confirmed by the increase in their polarization resistance (Rp) in 37% and 22%, respectively, calculated from EIS data.

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“…In this regard, a composite coating may be a possible option for increasing the adhesion force of organic biopolymer coatings [12,13]. In addition, the formation of composite coatings not only improves corrosion resistance, but also imparts potential bioactivity and biocompatibility to magnesium alloys during long-term use.…”

Section: Current Trendsmentioning

confidence: 99%

Biodegradable Polymer Materials In Medicine

Abbasov

2021

J. Compos. Biodegradable Polym.

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This paper provides an overview of the current state of research in the field of the use of biodegradable polymers for medical purposes. The relevance of the research topic is noted, current trends in the development of biodegradable polymers, the creation of polymer protective coatings, polymers with shape memory effect for medical devices for various applications are described. The classification of modern biodegradable polymers, features of synthetic and natural biopolymers is presented, their advantages and disadvantages are indicated. Biodegradable polymers for drug encapsulation and delivery, the possibility of creating nanostructured polymers for pharmaceuticals are presented. The prospects for the future development of the use of biodegradable polymers in medicine are analyzed and described.

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Hydrophobic Modification of Magnesium Hydroxide Coating Deposited Cathodically on Magnesium Alloy and its Corrosion Protection

Cited by 9 publications

References 20 publications

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

A Comprehensive Review on Surface Modifications of Biodegradable Magnesium-Based Implant Alloy: Polymer Coatings Opportunities and Challenges

Hybrid Coating of Polystyrene–ZrO2 for Corrosion Protection of AM Magnesium Alloys

Biodegradable Polymer Materials In Medicine

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