Silane/TiO2 coating to control the corrosion rate of magnesium alloys in simulated body fluid

Córdoba, Laura C.; Montemor, M.F.; Coradin, Thibaud

doi:10.1016/j.corsci.2015.12.006

Cited by 86 publications

(49 citation statements)

References 38 publications

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“…To overcome the challenges related to the use of Mg alloys, many studies have been working on finding ways to slow down the degradation of Mg alloys under physiological conditions in vitro through diverse approaches, such as development of new Mg alloys with different elements and deposition of anticorrosive coatings on Mg alloys substrates. Córdoba used a silane/TiO 2 coating to control the corrosion rate of Mg alloys in simulated body fluid [15]. Sachiko Hiromoto studied the self-healing properties of hydroxyapatite and octacalcium phosphate coatings on pure Mg and a Mg alloy [16].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Corrosion Resistance and Cytocompatibility of a Bioactive Micro-Arc Oxidation Coating on AZ31 Mg Alloy

Jian

Shih

et al. 2019

Coatings

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Magnesium alloys have recently been attracting attention as a degradable biomaterial. They have advantages including non-toxicity, biocompatibility, and biodegradability. To develop magnesium alloys into biodegradable medical materials, previous research has quantitatively analyzed magnesium alloy corrosion by focusing on the overall changes in the alloy. Therefore, the objective of this study is to develop a bioactive material by applying a ceramic oxide coating (magnesia) on AZ31 magnesium alloy through micro-arc oxidation (MAO) process. This MAO process is conducted under pulsed bipolar constant current conditions in a Si-and P-containing electrolyte and the optimal processing parameters in corrosion protection are obtained by the Taguchi method to design a coating with good anti-corrosion performance. The negative duty cycle and treatment time are two deciding factors of the coating's capability in corrosion protection. Microstructure characterizations are investigated by means of SEM and XRD. The simulation body-fluid solution is utilized for testing the corrosion resistance with the potentiodynamic polarization and the electrochemical impedance test data. Finally, an in vivo testing shows that the MAO-coated AZ31 has good cytocompatibility and anticorrosive properties.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Corrosion Resistance and Cytocompatibility of a Bioactive Micro-Arc Oxidation Coating on AZ31 Mg Alloy

Jian

Shih

et al. 2019

Coatings

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“…In fact, the study by Gaur et al showed a reduction of 3 orders of magnitude in low frequency impedance after nearly 12 days of immersion in SBF. Similarly, the study by Córdoba et al showed a reduction in low frequency impedance by half an order of magnitude in a silane‐TiO 2 composite after 14 days, but did not discuss the mechanism. When comparing studies, there is also a clear discrepancy between the methods used to quantify corrosion activity—studies tend to use hydrogen evolution, corrosion current density, corrosion potential, hydrogen evolution volume and any number of modelled parameters from equivalent circuit modelling.…”

Section: Biocorrosionmentioning

confidence: 95%

Silane coatings of metallic biomaterials for biomedical implants: A preliminary review

Somasundaram

2018

J Biomed Mater Res

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In response to increased attention in literature, this work provides a qualitative review surrounding the application of silane-based coatings of metallic biomaterials for biomedical implants. Included herein is both a brief summary of existing knowledge and concepts regarding silane-based thin films, along with an analysis of recent peer-reviewed publications and advances towards their practical application for biomedical coatings. Specifically, the review identifies innovative silane-based coatings according to their molecular identity and film structure and analyses their impact on the biocorrosion resistance, protein adsorption, cell viability, and antimicrobial properties of the overall coated implant. It is shown that a range of common silanes clearly exhibit promising properties for biomedical implant coatings, but further work is needed, particularly on mechanisms of physiological interaction and characteristic effects of silane functional groups, before seeing clinical use. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2901-2918, 2018.

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“…If R f decreases and CPE f increases, suggesting that the coating barrier properties are gradually deteriorating. Interestingly, when the corrosion started, Q for CPE f (0.62 < n < 0.77) was slightly increased, implying that electrolyte uptake was ongoing and the coating barrier properties started to deteriorate [34].…”

Section: / 22mentioning

confidence: 97%

In vitro degradation and cytocompatibility of a silane/Mg(OH) 2 composite coating on AZ31 alloy by spin coating

Wang

Shen

Zhang

et al. 2017

Journal of Alloys and Compounds

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Silane/TiO2 coating to control the corrosion rate of magnesium alloys in simulated body fluid

Cited by 86 publications

References 38 publications

Evaluation of the Corrosion Resistance and Cytocompatibility of a Bioactive Micro-Arc Oxidation Coating on AZ31 Mg Alloy

Evaluation of the Corrosion Resistance and Cytocompatibility of a Bioactive Micro-Arc Oxidation Coating on AZ31 Mg Alloy

Silane coatings of metallic biomaterials for biomedical implants: A preliminary review

In vitro degradation and cytocompatibility of a silane/Mg(OH) 2 composite coating on AZ31 alloy by spin coating

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