Surface changes of Mg powder induced by hydration in different environments

Authors: Veronika Nagy Trembošová 1    Štefan Nagy 1    Martin Nosko 1    Erik Šimon 1    Matej Štepánek 1   
1 Ústav materiálov a mechaniky strojov SAV, Bratislava, SLOVENSKO   
Year: 2021
Section: Biomaterials
Abstract No.: 2215
ISBN: ISBN 978-80-972360-7-6

Along with mechanical modifications, creating a protective barrier that effectively isolates the metal from the environment is an effective way to improve Mg corrosion. It is possible to form carbonate from magnesium oxide below 200°C and with the presence of H2O [1]. For CO2 capture can be used besides MgO also Mg(OH)2 [2]. It has been reported that the layer of carbonates, which is formed after Mg exposure to corrosion environment on the surface of magnesium, causes a reduction in the corrosion rate [3]. In order for the protective layer to be effective against corrosion, it must be well adhered and without any defects. The protective layer's design on magnesium particles in PM technology plays a crucial role in producing the compact made from powders with desirable corrosion and mechanical properties. An acidic, basic, and neutral hydrating environment was studied for the creation of magnesium carbonate. These were chosen to determine the hydration rate, product formed on the Mg powders surface, and possible transformation to the carbonate layer. Mechanical and corrosion properties were measured on extruded compacts.

This work was performed during the implementation of the project Building-up Centre for advanced materials application of the SAS, ITMS project code 313021T081 supported by Research & Innovation Operational Programme funded by the ERDF and VEGA 2/0098/19.
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