Regulation of corrosion damage of magnesium alloys through the use of vacuum zirconium coatings

M.L. Linderov ORCID logo , M.A. Afanasyev, A.N. Asmolov, V.A. Danilov ORCID logo , D.L. Merson show affiliations and emails
Received: 14 May 2021; Revised: 21 August 2021; Accepted: 26 August 2021
This paper is written in Russian
Citation: M.L. Linderov, M.A. Afanasyev, A.N. Asmolov, V.A. Danilov, D.L. Merson. Regulation of corrosion damage of magnesium alloys through the use of vacuum zirconium coatings. Lett. Mater., 2021, 11(3) 357-362


Regulation of the corrosion rate of bioresorbable magnesium alloys through the use of vacuum zirconium coatings.Magnesium alloys have a unique combination of properties in terms of specific strength, modulus of elasticity and biocompatibility, which allows them to be considered as one of the most promising materials for use as temporary bioresorbable implants capable of being replaced by bone tissue in the process of gradual dissolution in the human body, thereby eliminating the need for repeated surgical intervention to remove the implant after healing. In this regard, the world scientific community pays much attention to works aimed at developing methods for controlling the corrosion damage of magnesium alloys. The presented study demonstrates that such precision control can be realized using vacuum zirconium coatings, while Zr itself is already actively used in medicine. It has been shown that the application of a zirconium coating on the MA14 (ZK60) alloy, which is currently considered as one of the possible candidates for use in medical practice, with thicknesses of 0.4 μm and 0.8 μm, can reduce the corrosion damage estimated by the hydrogen yield, based on 110 hours per 1.3 and 1.6 times, respectively. The favorable effect of the zirconium coating on the resistance to corrosion processes is confirmed by the results obtained using a laser confocal microscope: a decrease in both the total corroded area and the depth of corrosion damage was recorded in three-dimensional images of the sample surface. In addition, in the work using scanning electron microscopy, a comprehensive study of the obtained coatings is presented, which made it possible to characterize its structure and chemical composition. The adhesion characteristics of the coating were evaluated by scratching on a tester and showed that for a coating with a thickness of 0.8 μm, fracture is observed at an indentation load of the conical indenter of the order of 0.5 N.

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