Effect of pH on the corrosion and crack growth behavior of the ZK60 magnesium alloy

Sun, Kaiqiang; Gao, Hong; Hu, Jing; Yan, Yingzhu

doi:10.1016/j.corsci.2020.109135

Cited by 25 publications

(7 citation statements)

References 58 publications

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“…Figure 9 shows the surface morphology of degraded samples after immersion in Hanks' solution for 14 and 28 days. After immersion for 14 days, the bare ZK60 sample showed some cracks, pits and degradation products on the surface (Figure 9A), which significantly spread and deepened after 28 days of dipping (Figure 9B), which is also consistent with literature reports [41]. In contrast, the HA coated ZK60 sample showed a homogeneous surface coating with no cracks observed for 14 days (Figure 9C).…”

Section: In Vitro Degradation Resistance Of Coatingssupporting

confidence: 89%

In Vitro Corrosion Resistance of a Layer-by-Layer Engineered Hybrid Coating on ZK60 Magnesium Alloy

et al. 2022

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Magnesium alloys are next generation biodegradable implants for clinical applications. However, their medical applications are currently hampered by their rapid corrosion rate in the physiological environment. To overcome such limitations, we have applied a novel layer-by-layer engineering approach of introducing anodization-induced microrough oxidized surface on ZK60 magnesium alloy, followed by surface mineralization with natural calcium apatite (hydroxyapatite, HA), and surface coating with natural protein (silk fibroin, SF); which, effectively reduces corrosion and degradation rate of ZK60 in simulated body fluid. Anodization of ZK60 improved the surface adhesion strength of HA layer; HA layer increased the surface roughness, hydrophilicity and micro-hardness, whereas decreased ionic release; SF layer decreased surface microroughness and hydrophilicity, whereas improved the stability of HA layer. The SF + HA coating on anodized ZK60 effectively decreased the in vitro weight loss (degradation) by almost six times, whereas corrosion rate by more than two orders in magnitude. Such interfacial coatings, with biocompatible SF on the outer surface, could potentially expand the application of ZK60 in the field of biomedical engineering.

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Section: In Vitro Degradation Resistance Of Coatingssupporting

confidence: 89%

In Vitro Corrosion Resistance of a Layer-by-Layer Engineered Hybrid Coating on ZK60 Magnesium Alloy

et al. 2022

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“…Researchers previously defined Mg-based metals as a type of “biodegradable metal” from the aspect of biofunction of materials owing to the osteopromotive effects of their degradation products. − Zn is known to influence bone remodeling . In our study, after alloying with Zn and Ca, the osteogenic ability still existed, both in vitro and in vivo .…”

Section: Discussionmentioning

confidence: 66%

Microalloying Design of Biodegradable Mg–2Zn–0.05Ca Promises Improved Bone-Implant Applications

Mao

Jin

Sun

et al. 2021

ACS Biomater. Sci. Eng.

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Mg and its alloys have been comprehensively studied and show huge potential for clinical orthopedic applications. However, balancing the mechanical strength and corrosion resistance of alloys is still a challenge. In light of this, micro-level contents of Zn and Ca were added to pure Mg to fabricate a Mg−2Zn−0.05Ca microalloy to expectedly enhance the mechanical strength and concurrently improve the corrosion resistance. The characteristics of the rolled Mg−2Zn−0.05Ca microalloy were explored using optical microscopy, X-ray diffraction, and tensile tests. The corrosion behavior and mechanical strength loss were explored using electrochemical and immersion tests. The effects of the microalloy extract on the proliferation, adhesion, and osteogenic differentiation of MC3T3-E1 cells were systematically studied. Moreover, implantations were done in femoral condyles of rabbits to study the degradation properties, osteogenic effect, mechanical strength loss, and biosafety of the microalloy. The ultimate tensile strength and yield strength of the rolled microalloy were found to be significantly elevated to 257 ± 2.74 and 237.6 ± 8.29 MPa, respectively. The microalloy showed a stable and gradual strength loss during degradation, both in vivo and in vitro. Concurrently, the microalloy exhibited improved corrosion resistance ability and especially, in vivo, the rolled microalloy exhibited a comparable degradation rate to that of rolled pure Mg within the initial 12 weeks of implantation. Additionally, the microalloy promoted osteogenesis, both in vitro and in vivo, and no short-and long-term toxicities of the microalloy were observed in rabbits. This study suggested that the rolled Mg−2Zn−0.05Ca microalloy effectively balanced the mechanical strength and corrosion resistance and showed potential application as bone implants.

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“…9A). 42 As shown in Fig. 9D, for the impedance values tted by the Randle circuit, the solution resistance R S decreased due to the attack of corrosive ions on the alloy surface.…”

Section: Corrosion Studiesmentioning

confidence: 88%

Experimental and DFT studies of gadolinium decorated graphene oxide materials for their redox properties and as a corrosion inhibition barrier layer on Mg AZ13 alloy in a 3.5% NaCl environment

et al. 2021

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Effect of pH on the corrosion and crack growth behavior of the ZK60 magnesium alloy

Cited by 25 publications

References 58 publications

In Vitro Corrosion Resistance of a Layer-by-Layer Engineered Hybrid Coating on ZK60 Magnesium Alloy

In Vitro Corrosion Resistance of a Layer-by-Layer Engineered Hybrid Coating on ZK60 Magnesium Alloy

Microalloying Design of Biodegradable Mg–2Zn–0.05Ca Promises Improved Bone-Implant Applications

Experimental and DFT studies of gadolinium decorated graphene oxide materials for their redox properties and as a corrosion inhibition barrier layer on Mg AZ13 alloy in a 3.5% NaCl environment

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