Comparison of corrosion resistance and biocompatibility of magnesium phosphate (MgP), zinc phosphate (ZnP) and calcium phosphate (CaP) conversion coatings on Mg alloy

Zai, Wei; Zhang, Xiaoru; Su, Yingchao; Man, Hau Chung; Li, Guangyu; Lian, Jianshe

doi:10.1016/j.surfcoat.2020.125919

Cited by 73 publications

(24 citation statements)

References 65 publications

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“…These HE rates were lower or of the same order of magnitude than 0.01 mL cm –2 day –1 that was reported as the tolerated rate to consider the treated AZ31 sample as the candidate biodegradable material for further tests in the human body . The highest recorded HE rate resulted, in any case, lower or of the same order of magnitude of other HE rates reported in the literature for Mg and Mg-based electrodes for biomedical devices. − …”

Section: Resultssupporting

confidence: 48%

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Tuning of the Mg Alloy AZ31 Anodizing Process for Biodegradable Implants

Zaffora

Franco

Virtù

et al. 2021

ACS Appl. Mater. Interfaces

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Coatings were grown on the AZ31 Mg alloy by a hard anodizing process in the hot glycerol phosphate-containing electrolyte. Anodizing conditions were optimized, maximizing corrosion resistance estimated by impedance measurements carried out in Hank’s solution at 37 °C. A post anodizing annealing treatment (350 °C for 24 h) allowed us to further enhance the corrosion resistance of the coatings mainly containing magnesium phosphate according to energy-dispersive X-ray spectroscopy and Raman analyses. Gravimetric measurements revealed a hydrogen evolution rate within the limits acceptable for application of AZ31 in biomedical devices. In vitro tests demonstrated that the coatings are biocompatible with a preosteoblast cell line.

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Section: Resultssupporting

confidence: 48%

“… 38 The highest recorded HE rate resulted, in any case, lower or of the same order of magnitude of other HE rates reported in the literature for Mg and Mg-based electrodes for biomedical devices. 42 − 45 …”

Section: Resultsmentioning

confidence: 99%

Tuning of the Mg Alloy AZ31 Anodizing Process for Biodegradable Implants

Zaffora

Franco

Virtù

et al. 2021

ACS Appl. Mater. Interfaces

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“…Although Mg will form film during the process of oxidation, the improvement of corrosion resistance is extremely limited, resulting from the film being thin and not compact. The corrosion rate of Mg alloy products will be reduced by coating [6][7][8][9], alloying [10][11][12][13][14] and heat treatment [15,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure on Corrosion Behavior of WE43 Magnesium Alloy in As Cast and Heat-Treated Conditions

Yang

Gupta

Ding

et al. 2020

Metals

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The improvement in corrosion resistance of WE43 was well realized by heat treatment. To study the influence of microstructure on the corrosion behavior of WE43 in as-cast and heat-treated conditions, an immersion test was employed with as-cast and heat-treated samples in the 3.5% NaCl solution. The corrosion rate and change of morphology were recorded and the corrosion behavior was further investigated by scanning electron microscopy (SEM). The results indicated that the corrosion rate of the WE43 alloy decreased after heat treatment. It was observed that the eutectic gradually damages the protective film on the surface of the as-cast WE43 in the process of corrosion, which further increases the corrosion rate. The Zr-rich phase formed a domed structure resulting in the adjacent area being further corroded. The Y-rich phase has little effect on the corrosion reaction.

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“…138–143 Zai and colleagues compared the corrosion resistance and biocompatibility of MgP, zinc phosphate (ZnP) and CaP conversion coatings on an Mg alloy, and the results indicated that the order of conversion coating generation priority was ZnP > CaP > MgP; the order of compactness was MgP > CaP > ZnP; the order of long-term corrosion resistance was ZnP > CaP > MgP; and the CaP coatings exhibited better biocompatibility than ZnP and MgP coatings as well as bare Mg alloy substrates. 144 Zaffora et al verified that MgP coatings that had grown on the AZ31 Mg alloy by a hard anodizing process were biocompatible and could enhance the corrosion resistance of the AZ31 Mg alloy. 145 Similarly, Ma et al also confirmed that MgP coating not only significantly decreased the degradation rate of the AZ31 alloy, but also promoted the cell proliferation.…”

Section: Magnesium Phosphate Coatingsmentioning

confidence: 99%

Biodegradable magnesium phosphates in biomedical applications

et al. 2022

J. Mater. Chem. B

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Comparison of corrosion resistance and biocompatibility of magnesium phosphate (MgP), zinc phosphate (ZnP) and calcium phosphate (CaP) conversion coatings on Mg alloy

Cited by 73 publications

References 65 publications

Tuning of the Mg Alloy AZ31 Anodizing Process for Biodegradable Implants

Tuning of the Mg Alloy AZ31 Anodizing Process for Biodegradable Implants

Effect of Microstructure on Corrosion Behavior of WE43 Magnesium Alloy in As Cast and Heat-Treated Conditions

Biodegradable magnesium phosphates in biomedical applications

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