Improving the Corrosion Resistance of Biodegradable Magnesium Alloys by Diffusion Coating Process

2015 ◽  
pp. 403-406
Author(s):  
Galit Katarivas Levy ◽  
Eli Aghion
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Diffusion Coating ◽  
Coating Process ◽  
Biodegradable Magnesium

scholarly journals Tunable Microstructure and Morphology of the Self-Assembly Hydroxyapatite Coatings on ZK60 Magnesium Alloy Substrates Using Hydrothermal Methods

Coatings ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 8
Author(s):  
Taolei Wang ◽  
Chao Lin ◽  
Dan Batalu ◽  
Jingzhou Hu ◽  
Wei Lu
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Self Assembly ◽  
Ph Value ◽  
Precursor Solution ◽  
Electrochemical Tests ◽  
Ha Coating ◽  
Hydroxyapatite Coatings ◽  
And Performance ◽  
Biodegradable Magnesium

Hydroxyapatite coatings have been widely used to improve the corrosion resistance of biodegradable magnesium alloys. In this paper, in order to manufacture the ideal hydroxyapatite (HA) coating on the ZK60 magnesium substrate by hydrothermal method, formation mechanism of enhanced hydroxyapatite (HA) coatings, influence of pH values of the precursor solution on the HA morphology, corrosion resistance and cytotoxicity of HA coatings have been investigated. Results show that the growth pattern of the HA is influenced by the local pH value. HA has a preferential c-axis and higher crystallinity in the alkaline environment developing a nanorod-like structure, while in acid and neutral environments it has a preferential growth along the a(b)-plane with a lower crystallinity, developing a nanosheet-like structure. The different morphology and microstructure lead to different degradation behavior and performance of HA coatings. Immersion and electrochemical tests show that the neutral environment promote formation of HA coatings with high corrosion resistance. The cell culture experiments confirm that the enhanced corrosion resistance assure the biocompatibility of the substrate-coating system. In general, the HA coating prepared in neutral environment shows great potential in surface modification of magnesium alloys.

Enhanced antimicrobial properties, cytocompatibility, and corrosion resistance of plasma-modified biodegradable magnesium alloys

2014 ◽  
Vol 10 (1) ◽  
pp. 544-556 ◽  
Author(s):  
Ying Zhao ◽  
Mohammed Ibrahim Jamesh ◽  
Wing Kan Li ◽  
Guosong Wu ◽  
Chenxi Wang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Antimicrobial Properties ◽  
Biodegradable Magnesium

scholarly journals The Functional Properties of Mg–Zn–X Biodegradable Magnesium Alloys

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 544 ◽  
Author(s):  
Dmitry Merson ◽  
Alexander Brilevsky ◽  
Pavel Myagkikh ◽  
Alexandra Tarkova ◽  
Alexei Prokhorikhin ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Functional Properties ◽  
Biomedical Applications ◽  
Mechanical Performance ◽  
Chemical Compositions ◽  
Premature Failure ◽  
Inflammatory Reactions ◽  
Biodegradable Magnesium

The implantation of metallic devices in orthopaedic surgical procedures and coronary angioplasty is associated with the risk of various adverse events: (i) mechanical (premature failure), (ii) chemo-mechanical (corrosion and corrosion-fatigue degradation) and (iii) biomedical (chronic local inflammatory reactions, tissue necrosis, etc.). In this regard, the development of biodegradable implants/stents, which provide the necessary mechanical support for the healing period of the bone or the vessel wall and then are completely resorbed, has bright prospects. Magnesium alloys are the most suitable candidates for that purpose due to their superior mechanical performance, bioresorbability and biocompatibility. This article presents the results of the comparative research on several wrought biodegradable alloys, assessing their potential for biomedical applications. The Mg–Zn–X alloys with different chemical compositions and microstructures were produced using severe plastic deformation techniques. Functional properties pivotal for biomedical applications—mechanical strength, in vitro corrosion resistance and cytotoxic activity—were included in the focus of the study. Excellent mechanical performance and low cytotoxic effects are documented for all alloys with a notable exception for one of two Mg–Zn–Zr alloys. The in vitro corrosion resistance is, however, below expectations due to critical impurities, and this property has yet to be drastically improved through the cleaner materials fabrication processing before they can be considered for biomedical applications.

scholarly journals Interrelation of Microstructure and Corrosion Resistance in Biodegradable Magnesium Alloys with Aluminum, Lithium and Rare Earth Additions

2015 ◽  
Vol 128 (4) ◽  
pp. 491-497 ◽  
Author(s):  
P. Minárik ◽  
M. Landa ◽  
I.K. Lesná ◽  
M. Zemková ◽  
E. Jablonská ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Magnesium Alloys ◽  
Aluminum Lithium ◽  
Rare Earth Additions ◽  
Biodegradable Magnesium

scholarly journals Electrochemical Evaluation of Some Mg-Ca-Mn-Zr Biodegradable Alloys

2019 ◽  
Vol 70 (9) ◽  
pp. 3435-3440
Author(s):  
Bogdan Istrate ◽  
Corneliu Munteanu ◽  
Romeu Chelariu ◽  
Dumitru Mihai ◽  
Ramona Cimpoesu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Degradation Rate ◽  
Electrochemical Behaviour ◽  
Orthopedic Implants ◽  
Microstructure Refinement ◽  
Low Concentrations ◽  
Wide Range ◽  
Biodegradable Magnesium ◽  
Electrochemical Evaluation

Biodegradable magnesium alloys represent a class of materials with high properties that are used in a wide range of fields, such as medicine, aeronautics and automotive. Alloying the Mg-based alloys with small percentages of elements such as Ca, Mn and Zr can conduct to the obtaining of some materials that can be the basis for the development of orthopedic implants. Calcium contributes to the formation of the Mg2Ca lamellar compound, low concentrations of zirconium helps the microstructure refinement and corrosion resistance and the alloying with manganese leads to the increase of the mechanical characteristics.In this paper, the electrochemical behaviour of four biodegradable alloys from the Mg-Ca-Mn-Zr system was evaluated, with variable concentrations (0.5% -1%) of Mn, respectively Zr. Alloying the system with 1% of each element (Ca, Mn, Zr) led to the obtaining of the alloy with the highest corrosion resistance and the lowest degradation rate.

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