Novel sol gel coating of Nb2O5 on magnesium alloy for biomedical applications

Dynamic electrochemical impedance study of fluoride conversion coating on AZ31 magnesium alloy to improve bio‐adaptability for orthopedic application

“…In the field of biomedical applications, biodegradable implants are gaining interest as it avoids the revision surgery which in turn reduces the rehabilitation time and cost . Magnesium and its alloys attracted the attention of scientific community with enviable property of non‐toxicity and similar Young's modulus to that of bone . Biodegradability, reabsorbability, and osteoconductivity are unique features of Mg and its alloys to employ them as temporary orthopedic implant.…”

Microstructural characterization, biocorrosion evaluation and mechanical properties of nanostructured ZnO and Si/ZnO coated Mg/HA/TiO2/MgO nanocomposites

“…ACCEPTED MANUSCRIPT 18 addition, the intensity of the Mg 2p spectra indicates a smaller amount in the Si/ZnO-coated sample compared with that in the ZnO-coated sample, which indicates more severe corrosion occurred in the ZnO-coated sample. The C 1s spectrum with a binding energy of ~286 eV in the XPS spectra may be due to the existence of carbonate ions ( ) in the HA phase [64].…”

“…Nano porosities in coating layers facilitate the mechanical interlocking of the cells with the surface, thereby favouring osseointegration process. Porosity also favours osseointegration and ensures more contact surface that providing the pathways for the permeation of cell nutrition [18].…”

“…Therefore, improvement in the corrosion resistance of Mg alloys is essential while the mechanical properties are not compromised or even enhanced for increasing their potential applications. Alloying with non-toxic elements, such as Ca [10], Zn [11], and Si [12], to form magnesium-matrix composites (MMCs) with bioceramics of natural human bone compositions, such as hydroxylapatite (HA) [13][14][15] and β-tricalcium phosphate (β-TCP) [16], as well as surface treatment have been widely employed to decrease the corrosion rate of Mg-based materials [17][18][19][20][21][22]. Surface modification techniques, such as physical vapor deposition (PVD) [23], alkaline heat treatment [19], micro-arc oxidation [24], electrodeposition [22,23], the sol-gel method [17,18], and magnetron sputtering [25], are effective for solving these problems.…”

Fabrication and corrosion behavior of Si/HA nano-composite coatings on biodegradable Mg–Zn–Mn–Ca alloy

“…The existence of small voids and their coalescence allowed easier contact between the solution and the substrate, thereby accelerating corrosion. However, porosity also facilitates the mechanical interlocking of bone cells with the surface, hence it has beneficial effect for the cell attachment and the osseointegration process [33]. It was also observed that the Si coated sample was mainly composed of granular structures while the HA sample consisted of granular particles with sharply defined asperities covering the surface.…”