An investigation of the corrosion mechanisms of WE43 Mg alloy in a modified simulated body fluid solution: The influence of immersion time

An investigation of the corrosion mechanisms of WE43 Mg alloy in a modified simulated body fluid solution: The effect of electrolyte renewal

“…The microstructure of the WE43 Mg alloy has been previously described by the authors [28]. The EEC physical interpretation was elaborated according to the following data reported in the literature for the corrosion of pure Mg and assuming that the WE43 Mg alloy α-Mg matrix has a corrosion behaviour similar to that of pure Mg, as has been pointed out by some authors for other Mg alloys [44,45]: 1) the corrosion layer is composed of a thin MgO barrier film in contact with the substrate metal and a relatively thick Mg(OH) 2 layer covering the MgO film and the film-free areas [46]; and 2) Mg corrosion occurs on the corrosion film-free areas with the formation of adsorbed Mg intermediates (reaction 2) [21].…”

“…It has been shown that the selection of the electrolyte composition, the use of buffering agents to control the electrolyte pH and the electrolyte-volume/sample-surface ratio have an impact on the in vitro corrosion behaviour of Mg alloys [24][25][26]. Control of the electrolyte pH has been attempted by the use of buffering reagents such as TRIS and HEPES; however, an increase in the electrolyte pH beyond the physiological range, with pH values above 8, has been reported [27][28][29][30][31], or the pH increase has not at all been reported [32][33][34][35][36]. The increase in the electrolyte pH and concentration of Mg 2+ ions can also affect the solubility equilibrium of relevant electrolyte components such as calcium, phosphate and carbonate species, which play a role in the protective ability of the corrosion layer and the occurrence of localized corrosion.…”

Optimized in vitro procedure for assessing the cytocompatibility of magnesium-based biomaterials

“…In vitro biocompatibility 30 Plasma electrolytic oxidation (PEO) 31 3 2 a b s t r a c t 33 Magnesium (Mg) is a promising biomaterial for degradable implant applications that has been exten- 34 sively studied in vitro and in vivo in recent years. In this study, we developed a procedure that allows Magnesium represents a promising biomaterial for degradable 52 implant applications that has been extensively studied within the 53 last 15 years [1,2].…”

Diseño de recubrimientos multicapa barrera-biomimético base TEOS-GPTMS sobre la aleación de magnesio Elektron 21 de potencial aplicación en la fabricación de implantes ortopédicos

“…De igual manera, para los mayores tiempos de inmersión se aprecia un comportamiento inductivo a bajas frecuencias, que puede estar relacionado con la adsorción-desorción de especies, tal como Mg(OH) ads y Mg(OH) 2 . Así, la evolución de dichos puntos indica un incremento de la actividad de corrosión (Zomorodian et al, 2012, Ascencio et al, 2014.…”