Influence of zinc on the microstructure, mechanical properties and in vitro corrosion behavior of magnesium–zinc binary alloys

Koç, Erkan; Kannan, M. Bobby; Ünal, Mehmet; Candan, Ercan

doi:10.1016/j.jallcom.2015.06.227

Cited by 90 publications

(33 citation statements)

References 23 publications

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Section: Discussionmentioning

confidence: 99%

“…The anodic sites of micro-galvanic degradation, in this case, magnesium-rich areas, exhibited localised degradation. It is interesting to note that alloying zinc to magnesium has shown improvement in the degradation resistance [20,44,45]. Koç et al [20] reported an increase in degradation resistance in zinccontaining magnesium alloys and attributed this to grain size refinement.…”

Section: Discussionmentioning

confidence: 99%

“…However, ion-implantation has no effect on the grain size. Cai et al [44] and Koç et al [20] further attributed the improved degradation resistance in zinc-containing alloys to uniform distribution of zinc assisting in the passivation, however when added in small amounts (i.e., less than or equal to 5 wt %). In the case of ion-implantation, densely-populated zinc appears to be detrimental.…”

Section: Discussionmentioning

confidence: 99%

“…Zinc is a biocompatible metal and has been used as an alloying element in magnesium for potential biodegradable implants [20,21]. Recently, there have been some works on zinc-ion implantation [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…It should be noted that all work on zinc-ion implantation has been done at a relatively high fluence (0.9 × 10 17 to 3.6 × 10 17 ion·cm −2 ). Hence, it is worthwhile to examine lower fluences of zinc-ion as well to see if the degradation resistance is affected, since zinc-containing magnesium alloys have shown improvements to degradation resistance [20,27].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ion Implantation of Calcium and Zinc in Magnesium for Biodegradable Implant Applications

Somasundaram

Ionescu

Kannan

2018

Metals

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Abstract:In this study, magnesium was implanted with calcium-ion and zinc-ion at fluences of 10 15 , 10 16 , and 10 17 ion·cm −2 , and its in vitro degradation behaviour was evaluated using electrochemical techniques in simulated body fluid (SBF). Rutherford backscattering spectrometry (RBS) revealed that the implanted ions formed layers within the passive magnesium-oxide/hydroxide layers. Electrochemical impedance spectroscopy (EIS) results demonstrated that calcium-ion implantation at a fluence of 10 15 ions·cm −2 increased the polarisation resistance by 24%, but higher fluences showed no appreciable improvement. In the case of zinc-ion implantation, increase in the fluence decreased the polarisation resistance. A fluence of 10 17 ion·cm −2 decreased the polarisation resistance by 65%, and fluences of 10 15 and 10 16 showed only marginal effect. Similarly, potentiodynamic polarisation results also suggested that low fluence of calcium-ion decreased the degradation rate by 38% and high fluence of zinc-ion increased the degradation rate by 61%. All the post-polarized ion-implanted samples and the bare metal revealed phosphate and carbonate formation. However, the improved degradative behaviour in calcium-ion implanted samples can be due to a relatively better passivation, whereas the reduction in degradation resistance in zinc-ion implanted samples can be attributed to the micro-galvanic effect.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ion Implantation of Calcium and Zinc in Magnesium for Biodegradable Implant Applications

Somasundaram

Ionescu

Kannan

2018

Metals

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Corrosion decomposition and mechanical behaviors of As‐cast Mg–xZn–Zr alloys

Zhou

Tian

et al. 2020

Materials & Corrosion

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Developing new‐type alloy materials with excellent decomposition properties and mechanical behaviors is a thorny issue for preparing fracturing balls in oil exploitation. As‐cast Mg–xZn–Zr alloys designed by regulating Zn contents have been fabricated in this study. Compressive strength and immersion corrosion test have been investigated to assess their feasibility as decomposition materials. Scanning electron microscopy and X‐ray diffract meter have also been used to characterize surface morphologies and phase structures for determining their decomposition mechanism. Results show that matrix phases and secondary phases with discontinuous reticular features form on the alloys. They also achieve excellent mechanical properties to ensure stability and pressure‐maintaining capacity in the decomposition process in chloride environment. Meanwhile, with Zn content and immersion time increasing, galvanic corrosion effect strengthens leading to accelerated specific mass loss rates of the alloys. Rapid corrosion decomposition of the alloys mainly attributes to anodic dissolution of matrix phases, exfoliation of microparticles, and poor resistance of corrosion products to the decomposition process. This study provides positive insight into the preparation of new‐type Mg alloys for guaranteeing fast decomposition of fracturing balls and also ensuring their compressive strength stability.

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Recent Approaches for Enhancing Corrosion Resistance of PEO/MAO-Coated Mg and Its Alloys

Kannan

Lenin

Khakbaz

et al. 2022

Conversion Coatings for Magnesium and Its Alloys

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Influence of zinc on the microstructure, mechanical properties and in vitro corrosion behavior of magnesium–zinc binary alloys

Cited by 90 publications

References 23 publications

Ion Implantation of Calcium and Zinc in Magnesium for Biodegradable Implant Applications

Ion Implantation of Calcium and Zinc in Magnesium for Biodegradable Implant Applications

Corrosion decomposition and mechanical behaviors of As‐cast Mg–xZn–Zr alloys

Recent Approaches for Enhancing Corrosion Resistance of PEO/MAO-Coated Mg and Its Alloys

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