The effect of treatment time on the ionic liquid surface film formation: Promising surface coating for Mg alloy AZ31

Zhang, Yafei; Liu, Xiao; Jamali, S.H.; Hinton, Bruce; Moulton, Simon E.; Wallace, Gordon G.; Forsyth, Maria

doi:10.1016/j.surfcoat.2016.04.038

Cited by 18 publications

(8 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…38−40 For example, Forsyth et al proposed a chemical conversion film on the magnesium alloy with biocompatible phosphate-based ionic liquids. 41,42 Deep eutectic solvents (DESs) are a kind of ionic liquids, 43 which were discovered by Abbott et al 44,45 DESs have attracted wide attention because they are cheap, easy to synthesize, and environmentally friendly. 38,46,47 Our group had proposed a facile heat treatment method for preparing conversion films on Mg-based substrates via the interaction of a choline chloride−urea DES with the substrate.…”

Section: Introductionmentioning

confidence: 99%

Formation and In Vitro Evaluation of a Deep Eutectic Solvent Conversion Film on Biodegradable Magnesium Alloy

Yao

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The chemical conversion films from deep eutectic solvents (DESs) have recently been shown to reduce the corrosion rate of magnesium alloys, which are recognized as a kind of promising materials applied in the human body. However, the biocompatibility of the conversion films has not been investigated. This study proposes an uncommon DES system composed of lithium chloride and urea to fabricate the chemical conversion films on Mg and its alloy. The fabrication process of the conversion film is facile, which is performed by the heat treatment of the substrate in the DES at about 200 °C for 30 min. It is found that the thermal decomposition of the DES can release hydrogen, which diffuses into the Mg substrate to form MgH2-based conversion films. The DES conversion film possesses a porous structure on pure Mg, whereas it becomes dense on the alloy with some cracks. X-ray photoelectron spectroscopy shows that MgCO3 and oxides also exist in the DES conversion films, which depends on the substrate. Electrochemical corrosion test and in vitro biocompatibility tests, including hemolysis, cytotoxicity, antibacterial, and cytoskeleton staining experiments, are performed in a simulated body environment, which shows that the corrosion resistance and biocompatibility of the substrates have been improved significantly. We expect that the DES heat treatment method will be applied to the fabrication of corrosion-resistant and biocompatible surfaces for biodegradable Mg alloys.

show abstract

Section: Introductionmentioning

confidence: 99%

Formation and In Vitro Evaluation of a Deep Eutectic Solvent Conversion Film on Biodegradable Magnesium Alloy

Yao

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The main reasons for the rapid degradation of Mg alloys can be ascribe to (1) the low corrosion potential (standard corrosion potential −2.37 V) makes it extremely easy to be corroded in the physiological environment; (2) the incompact corrosion product layer mainly consisted of Mg(OH) 2 results in continuous corrosion . To address these issues, extensive efforts have been devoted to enhance the corrosion resistance of Mg by alloying with inert noble elements or surface modifications. − However, most of the alloying elements have very limit solid solution in α-Mg and their intermetallic compounds prefer to form negative galvanic corrosion against α-Mg. On the other hand, surface modification only offer a solution for delaying the start of corrosion and rapid corrosion usually takes place once the modified surface breaks down.…”

Section: Introductionmentioning

confidence: 99%

Regulating Degradation Behavior by Incorporating Mesoporous Silica for Mg Bone Implants

Yang

Guo

et al. 2018

ACS Biomater. Sci. Eng.

View full text Add to dashboard Cite

Magnesium (Mg) alloys are potential bone implant materials because of their natural biodegradability, good biocompatibility and suitable mechanical properties. However, the too rapid degradation in physiological environment has delayed their introduction for orthopedic applications to date. To improve the degradation behavior, mesoporous silica (MS) was incorporated into ZK60 (Mg-6Zn-0.5Zr, wt %) via selective laser melting technology. Results showed that MS homogeneously incorporated in Mg matrix with good bonding interface. MS was chemical inert against Mg and shifted the corrosion potential positively, indicating an enhanced corrosion resistance. Moreover, MS promoted the deposition of apatite on surface and formed a compact protection layer, thus effectively preventing the further corrosion of Mg matrix. As a result, the degradation rate was reduced by 57%, with MS containing up to 8 wt %. In addition, ZK60/8MS composite exhibited improved biocompatibility. It was suggested the ZK60/8MS composite with improved degradation behavior and good biocompatibility was a potential candidate biomaterial for the bone implants.

show abstract

“…Ionic liquids (ILs) have become increasingly of interest in engineering applications, including chemical processes, 1,2 CO 2 capture, 3,4 lubrication, [5][6][7] electrochemical devices [8][9][10][11] and corrosion protection. [12][13][14][15][16] Their desirable properties can include low volatility, chemical and electrochemical stability and they can be potentially more environmental friendly and biologically more compatible. 17 All these make them ideal replacements for more traditional solvents or surface treatments.…”

Section: Introductionmentioning

confidence: 99%

“…40 Ionic liquid-derived protective/passivating surface films on Mg and Al alloys As a protective surface treatment, ionic liquids have been investigated predominantly for magnesium, but also on aluminium alloys. 13,16,51 The reader is referred to a review by Huang et al in 2013, which summarises the state of the art at that point. Briefly, following on from the SEI formation on reactive metals, such as lithium, it was shown that immersion of Mg alloys in an anionic liquid containing TFSI as the anion also led to the formation of a protective surface film.…”

Section: Introductionmentioning

confidence: 99%

“…3). 13,14,16 Interestingly, the uniformity of these films is enhanced by activation of the surface, either by using a potential bias (preferably anodic) or by heating the surface to between 50 and 100°C. 12,52 In both activated cases, the application of a potential or high temperature renders the alloy surface more reactive and thus metal oxidation occurs more rapidly, releasing for example Mg 2+ ions near the surface, which then react with the nearby anions forming a surface film.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interphase engineering of reactive metal surfaces using ionic liquids and deep eutectic solvents—from corrosion control to next-generation batteries

et al. 2017

Self Cite

View full text Add to dashboard Cite

Ionic liquids are unique solvents composed entirely of ions and have recently been considered for applications ranging from synthesis, separations, electrochemical devices, tribology and corrosion. In this perspective, we summarise the literature, and look at the future prospects, surrounding the use of ionic liquids in the engineering of interphases to control charge transport thereby leading to improved performance of high-energy density batteries, including Mg, Li and Na metal as well as corrosion protection of reactive engineering alloys, such as aluminium, magnesium and steel alloys. The ability to create task-specific ionic liquids by controlling the chemistry of either the anion or the cation means that interphases can be engineered for specific substrates and applications. Thus far, fluorine containing anions, such as bis(trifluoromethane) sulfonamide and its analogues, have been favoured for controlling the conductive solid-electrolyte interphase layer on Li and Na, while ionic liquids containing organophosphate anions have been used to form nanometre thick protective interphases on Mg alloys. Recently, ionic liquids based on carboxylate anions have also been shown to provide excellent corrosion inhibition for steel. In the search for cost-effective solutions, a relatively new class of ionic liquids, termed deep eutectic solvents, have also been explored as potential media for controlling surface films on reactive metals. The deep eutectic solvents class of ionic liquid materials offers many possible combinations of chemistry that can be targeted to produce desired properties in this context.

show abstract

The effect of treatment time on the ionic liquid surface film formation: Promising surface coating for Mg alloy AZ31

Cited by 18 publications

References 26 publications

Formation and In Vitro Evaluation of a Deep Eutectic Solvent Conversion Film on Biodegradable Magnesium Alloy

Formation and In Vitro Evaluation of a Deep Eutectic Solvent Conversion Film on Biodegradable Magnesium Alloy

Regulating Degradation Behavior by Incorporating Mesoporous Silica for Mg Bone Implants

Interphase engineering of reactive metal surfaces using ionic liquids and deep eutectic solvents—from corrosion control to next-generation batteries

Contact Info

Product

Resources

About