Growth Mechanism and Corrosion Resistance of a Co-Al Layered Double Hydroxide Film Grown In Situ on a Steel Substrate
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 4
Abstract
The growth mechanism of layered double hydroxide (LDH) films grown in situ on steel via hydrothermal treatment is still unclear. In this study, the mechanism of film grown in situ on a steel substrate was investigated in detail. During the hydrothermal reaction, the in situ growth process of Co-Al LDH on steel involved three steps: (1) hydrolysis of and etching of the steel surface, (2) hydrolysis of urea and promotion of LDH nuclei, and (3) crystallization of LDH. More importantly, the generation of determined the integrity of the LDH film grown on the steel surface, and a suitable heating rate was also the key factor that affected the growth of the ordered and regular LDH nanoflakes. Therefore, this work provides a comprehensive understanding of the in situ LDH growth mechanism on steel and may facilitate optimal LDH film preparation.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors acknowledge the financial support provided by the National Natural Science Foundation of China, China (Nos. U1801254, 52078298, and 51925805), Project of Department of Education of Guangdong Province, China (No. 2018KZDXM060), and the Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering (SZU) (No. 2020B1212060074).
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 4 • April 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Dec 28, 2021
Accepted: Aug 3, 2022
Published online: Jan 27, 2023
Published in print: Apr 1, 2023
Discussion open until: Jun 27, 2023
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