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A platform for research: civil engineering, architecture and urbanism
Electrodeposition-hydrothermal synthesis of inhibitor anion-intercalated layered double hydroxide films for corrosion resistance on steel substrates
https://orcid.org/0000-0001-8390-6796
Graphical abstract Display Omitted
Highlights A novel electrodeposition-hydrothermal method was proposed to grow LDH film on steel. The in-situ growth of inhibitor anion-intercalated LDH film on steel was realized. All LDH films were dense and uniform, exhibiting excellent corrosion resistance.
Abstract The in-situ growth of layered double hydroxide (LDH) film on steel substrates holds huge potential for corrosion protection in reinforced concrete. However, because steel will passivate in alkaline environments, almost only CO3 2−-LDH films can be grown in situ on carbon steel surfaces at present, limiting the ability of LDH to release inhibitory anions. In this study, we proposed a novel electrodeposition-hydrothermal method to grow Mg/Al-NO3 −-LDH films in situ on Q235 steel substrates. Subsequently, CO3 2−, PO4 3−, and V2O7 4− anion-intercalated LDH films were successfully prepared through anion exchange to enhance their functional applications. All LDH films were dense, uniform, and exhibited good adhesion to the substrate, with a thickness of approximately 20 μm. The electrochemical results demonstrated a significant improvement in the corrosion resistance of the steel containing LDH films. Specifically, the LDH films with intercalated inhibitory PO4 3− and V2O7 4− anions exhibited corrosion protection efficiencies exceeding 97.37 % in 3.5 wt% NaCl solution and 99.99 % in simulated concrete pore solution with chlorides.
Electrodeposition-hydrothermal synthesis of inhibitor anion-intercalated layered double hydroxide films for corrosion resistance on steel substrates
https://orcid.org/0000-0001-8390-6796
Graphical abstract Display Omitted
Highlights A novel electrodeposition-hydrothermal method was proposed to grow LDH film on steel. The in-situ growth of inhibitor anion-intercalated LDH film on steel was realized. All LDH films were dense and uniform, exhibiting excellent corrosion resistance.
Abstract The in-situ growth of layered double hydroxide (LDH) film on steel substrates holds huge potential for corrosion protection in reinforced concrete. However, because steel will passivate in alkaline environments, almost only CO3 2−-LDH films can be grown in situ on carbon steel surfaces at present, limiting the ability of LDH to release inhibitory anions. In this study, we proposed a novel electrodeposition-hydrothermal method to grow Mg/Al-NO3 −-LDH films in situ on Q235 steel substrates. Subsequently, CO3 2−, PO4 3−, and V2O7 4− anion-intercalated LDH films were successfully prepared through anion exchange to enhance their functional applications. All LDH films were dense, uniform, and exhibited good adhesion to the substrate, with a thickness of approximately 20 μm. The electrochemical results demonstrated a significant improvement in the corrosion resistance of the steel containing LDH films. Specifically, the LDH films with intercalated inhibitory PO4 3− and V2O7 4− anions exhibited corrosion protection efficiencies exceeding 97.37 % in 3.5 wt% NaCl solution and 99.99 % in simulated concrete pore solution with chlorides.
Electrodeposition-hydrothermal synthesis of inhibitor anion-intercalated layered double hydroxide films for corrosion resistance on steel substrates
https://orcid.org/0000-0001-8390-6796
Graphical abstract Display Omitted
Highlights A novel electrodeposition-hydrothermal method was proposed to grow LDH film on steel. The in-situ growth of inhibitor anion-intercalated LDH film on steel was realized. All LDH films were dense and uniform, exhibiting excellent corrosion resistance.
Abstract The in-situ growth of layered double hydroxide (LDH) film on steel substrates holds huge potential for corrosion protection in reinforced concrete. However, because steel will passivate in alkaline environments, almost only CO3 2−-LDH films can be grown in situ on carbon steel surfaces at present, limiting the ability of LDH to release inhibitory anions. In this study, we proposed a novel electrodeposition-hydrothermal method to grow Mg/Al-NO3 −-LDH films in situ on Q235 steel substrates. Subsequently, CO3 2−, PO4 3−, and V2O7 4− anion-intercalated LDH films were successfully prepared through anion exchange to enhance their functional applications. All LDH films were dense, uniform, and exhibited good adhesion to the substrate, with a thickness of approximately 20 μm. The electrochemical results demonstrated a significant improvement in the corrosion resistance of the steel containing LDH films. Specifically, the LDH films with intercalated inhibitory PO4 3− and V2O7 4− anions exhibited corrosion protection efficiencies exceeding 97.37 % in 3.5 wt% NaCl solution and 99.99 % in simulated concrete pore solution with chlorides.
Electrodeposition-hydrothermal synthesis of inhibitor anion-intercalated layered double hydroxide films for corrosion resistance on steel substrates
Dong, Biqin (author) / Liu, Wenjie (author) / Zeng, Lei (author) / Chen, Peiyu (author) / Yang, Qingrui (author) / Hong, Shuxian (author)
2023-09-27
Article (Journal)
Electronic Resource
English
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