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- W3099865136 abstract "Preparing Mg(OH)2-based materials by electrodeposition is a promising way to manufacture building materials in Mg2+-containing aqueous environments. This paper aims to test the feasibility of this method and study the impact of Ca2+ concentration on the properties of the deposit materials. The mass, thickness, and apparent density of the deposits were tested, and the composition and microstructure of the deposits were investigated by X-Ray diffractometry, scanning electron microscopy, low temperature nitrogen adsorption, and electrochemical impedance spectrum. When the Ca2+ concentration in the aqueous environment is below 0.0167 mol L−1, Mg(OH)2-based materials can form on the cathode, and the mass and thickness of the material increased with the Ca2+ concentration. Mg(OH)2 form layered structures in the micro-scale, and a small number of CaCO3, including aragonite in a region near the electrode and calcite in a further region, precipitate in between the Mg(OH)2 layers. Within each layer, nano-pores remain in between the Mg(OH)2 crystals, and the porosity of the bulk material decreased with the Ca2+ concentration, leading to an increased apparent density and thus an improved anticorrosion performance. When the Ca2+ concentration in the aqueous environment reaches ≥ 0.05 mol L−1, the materials formed on the electrode will spall due to the formation of portlandite, and thus the deposition process will be less efficient." @default.
- W3099865136 created "2020-11-23" @default.
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- W3099865136 date "2021-02-01" @default.
- W3099865136 modified "2023-10-16" @default.
- W3099865136 title "The effect of Ca2+ concentrations on the characteristics of Mg(OH)2-based building materials prepared in situ by electrodeposition" @default.
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- W3099865136 doi "https://doi.org/10.1016/j.conbuildmat.2020.121523" @default.
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