Effect of Electrodeposition Time on In-Situ Growth of Mg-Al-NO-3-LDH Films on Carbon Steel Surfaces

doi:10.16552/j.cnki.issn1001-1625.2025.0804

Abstract

Abstract: Layered double hydroxides (LDH), employed as nanocontainers with tunable intercalation structures and grown in-situ on steel reinforcement surfaces, offer a novel multifunctional approach to corrosion protection in steel reinforcement systems. Currently, the two-step electrodeposition-hydrothermal method can grow NO^-₃-LDH in-situ on a steel substrate, addressing the limitation of the LDH film grown by one-step hydrothermal method cannot incorporate corrosion inhibitors by exchanging interlayer anions, demonstrating significant potential in the field of metal protection. This study investigated the in-situ growth of Mg-Al-NO^-₃-LDH via electrodeposition-hydrothermal method. The effect of electrodeposition time on the microstructure and morphology of the LDH was examined, and the associated growth mechanism was elucidated. Results show that LDH films electrodeposited for 500 s form dense, defect-free structures with excellent adhesion to the substrate. These coatings provide superior corrosion protection on steel, exhibiting an order-of-magnitude increase in impedance compared to bare steel.

Key words: LDH film, carbon steel, electrodeposition method, corrosion protection, electrodeposition time, metal corrosion

CLC Number:

TU503

HONG Shuxian, TIAN Kun, CHEN Jiahao, LIU Wenjie, YANG Qingrui, WANG Xiang, DONG Biqin. Effect of Electrodeposition Time on In-Situ Growth of Mg-Al-NO^-₃-LDH Films on Carbon Steel Surfaces[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(11): 4199-4211.

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Effect of Electrodeposition Time on In-Situ Growth of Mg-Al-NO^-₃-LDH Films on Carbon Steel Surfaces

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