Preliminary Results on the Corrosion Behaviour of a New Biodegradable Metallic Material Based on Zinc

Dobrită, Simona Popescu; Istrate, Bogdan; Cimpoeşu, Nicanor; Stanciu, Sergiu; Apostol, Victor Daniel; Cimpoeșu, Ramona; Ioniţă, Iulian; Paraschiv, Petronela

doi:10.1088/1757-899x/374/1/012027

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…In addition, Zn-Mg castings are characterized by a natural tendency to create a heterogeneous microstructure, which favors heterogeneous corrosion in places that include rapidly corroded Mg. Therefore, considering the mechanical properties, homogeneity of biodegradation and typical cytotoxicity of most alloys binary Zn-Mg intended as initial material for biodegradable implants, in recent years a combination of cast material with the possibility of subsequent deformation has been looking [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Cavitational Erosion Behavior of a Biodegradable Alloy from the Zn-Mg System for Biomedical Applications

Maria Iordache,

Nicolae Luca,

Bordeasu

et al. 2024

Tribol. Ind.

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Zinc and magnesium are known to be biocompatible metals. For this reason, current technologies seek to build parts to be implanted in various places to help the human body. Among these are those in the blood circulatory system, such as the stars and valves at the heart, which aim to increase the life span of the hydrodynamic shocks of the blood circulatory system, in order to prevent heart attacks, respectively the bursting of various vessels that can be life-threatening. Studies in the field of flow show that even in the human body there are manifestations of cavitational type, as a result of pressure variations, with decrease below that of vaporization and then increase. Starting from these findings, the paper presents the results of the cavitation tests, carried out on the bicocompatiobil ZnMg alloy, created in Politehnica University of Bucharest laboratories. The objective is a new and future one that will lead to the realization of valves for the heart, or stars, that can withstand the shocks produced by the implosions of the cavitational bubbles in the blood. For this purpose, microstructural investigations are performed, mechanical properties are analysed and the behavior and resistance to erosion generated by vibrating cavitation are studied, according to the reference standard ASTM G32-2016. The results, compared to those of pure zinc, show that this alloy is a solution for building biocompatible components that can serve cardiac people, in order to reduce the harmful effects of the blood circulatory system.

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Section: Introductionmentioning

confidence: 99%

Cavitational Erosion Behavior of a Biodegradable Alloy from the Zn-Mg System for Biomedical Applications

Maria Iordache,

Nicolae Luca,

Bordeasu

et al. 2024

Tribol. Ind.

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“…Therefore, taking into account the mechanical properties, homogeneity of biodegradation and cytotoxicity typical of most Zn–Mg binary alloys intended as an initial material for biodegradable implants, a combination of cast material with subsequent forming has been sought as a solution in recent years. Several papers on biodegradable Zn–Mg binary alloys have been published in last two years concerning second phases and their significant influences on alloy properties [ 11 ], inhibition of twinning by the refined Mg 2 Zn 11 intermetallic phase [ 12 ], ultra-low concentration of Mg 0.08 wt% as the alloying element for potential biodegradable material for stent applications [ 13 ], contribution of work hardening, dynamic recrystallisation softening and grain boundary strengthening in the mechanical properties evolution, changing in a wide range of strength and elongation [ 14 ], Zn–Mg binary alloys as a suitable solution for medical or industrial applications of degradable materials that provide corrosion degradation periods ranging from those given by magnesium alloys and those derived from iron-based alloys [ 15 , 16 ] and the design and synthesis of microalloying Zn–Mg biodegradable metals with improved mechanical properties, which relies on the synergetic effects of both grain refinement and fast cooling [ 17 ]. A comprehensive review by Venezuela and Dargusch [ 18 ] summarizes the influence of alloying and fabrication techniques on the mechanical properties, biodegradability and biocompatibility of zinc and zinc alloys.…”

Section: Introductionmentioning

confidence: 99%

Structural and mechanical aspects of hypoeutectic Zn–Mg binary alloys for biodegradable vascular stent applications

Pachla

Przybysz

Jarzębska

et al. 2021

Bioactive Materials

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The study is concerned with the mechanical properties of Zn and three Zn–Mg double alloys with Mg concentrations: 0.5%, 1.0% and 1.5% in the form of rods with a diameter of 5 mm as potential materials for use in biodegradable medical implants, such as vascular stents. The materials were cast, next conventionally hot extruded at 250 °C and finally, hydrostatically extruded (HE) at ambient temperature. Occasionally HE process was carried at liquid nitrogen temperature or in combination with the ECAP process. After HE, the microstructure of the alloys was made up of fine-grained αZn of mean grain size ~1 μm in a 2-phase coat of 50–200 nm nano-grains of the fine αZn + Mg 2 Zn 11 eutectic. The 3 to 4-fold reduction of grain size as a result of HE allowed an increase in yield strength from 100% to over 200%, elongation to fracture from 100% to thirty fold and hardness over 50% compared to the best literature results for similar alloys. Exceptions accounted for elongation to fracture in case of Zn-0.5 Mg alloy and hardness in case of Zn-1.5 Mg alloy, both of which fell by 20%. For the Zn-0.5 Mg and Zn–1Mg alloys, after immersion tests, no corrosive degradation of plasticity was observed. Achieving these properties was the result of generating large plastic deformations at ambient temperature due to the application of high pressure forming with the cumulative HE method. The results showed that Zn–Mg binary alloys after HE have mechanical and corrosive characteristics, qualifying them for applications in biodegradable implants, including vascular stents.

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Studies on galvanic corrosion of metallic materials in marine medium

Nejneru

Savin

Perju

et al. 2019

IOP Conf. Ser.: Mater. Sci. Eng.

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Galvanic corrosion occupies an important place among the corrosion techniques studies, especially because harbors and naval installations presents multiple components which are in direct contact with saltwater during operation time, such as: boats propeller - bronze, ship hull - carbon steel, rivets - steel, different types of protection shields - aluminum etc., thus metallic types combinations increase selective erosion depending on the metal position in the galvanic series. The galvanic corrosion prevention can be achieved by local cathodic protection with pieces of electronegative metal (zinc, magnesium) placed near the contacts or by inserting between these two metals of one or multiple high corrosion resistance materials to that specific medium. This paper presents an experimental study on different metal couplings in Black Sea water corrosion medium, in order to highlight the anodic (oxidation) or cathodic (reduction) protection of each metal during coupling.

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Preliminary Results on the Corrosion Behaviour of a New Biodegradable Metallic Material Based on Zinc

Cited by 3 publications

References 8 publications

Cavitational Erosion Behavior of a Biodegradable Alloy from the Zn-Mg System for Biomedical Applications

Cavitational Erosion Behavior of a Biodegradable Alloy from the Zn-Mg System for Biomedical Applications

Structural and mechanical aspects of hypoeutectic Zn–Mg binary alloys for biodegradable vascular stent applications

Studies on galvanic corrosion of metallic materials in marine medium

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