Structure-modulated CaFe-LDHs with superior simultaneous removal of deleterious anions and corrosion protection of steel rebaropen access
- Authors
- Park, Ji Young; Lee, Jimin; Lim, Minseob; Go, Gwang-Myeong; Cho, Hong-Baek; Lee, Han-Seung; Choa, Yong-Ho
- Issue Date
- Mar-2021
- Publisher
- Royal Society of Chemistry
- Citation
- RSC Advances, v.11, no.18, pp 10951 - 10961
- Pages
- 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC Advances
- Volume
- 11
- Number
- 18
- Start Page
- 10951
- End Page
- 10961
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/426
- DOI
- 10.1039/d1ra00300c
- ISSN
- 2046-2069
2046-2069
- Abstract
- The three anionic species; chloride (Cl-), sulfate (SO42-), and carbonate (CO32-), are typical chemical factors that environmentally accelerate failure of concrete structures with steel rebar through long-term exposure. Efficient removal of these deleterious anions at the early stage of penetration is crucial to enhance the lifespan and durability of concrete structures. Here, we synthesize CaFe-layered double hydroxide (CaFe-LDHs) by a simple one-step co-precipitation technique and structural modulation by calcination process. It is applied for the removal of Cl-, SO42-, and CO32- anions as well as corrosion inhibition on steel rebar in aqueous solutions. The synthesized CaFe-LDHs with phase transfer show notable improvement of removal capacity (Q(max)) toward Cl- and SO42- over 3.4 times and over 5.69 times, respectably, then those of previous literatures. Furthermore, the steel rebar exposed to an aqueous solution containing the three anionic sources shows a fast corrosion rate (1876.56 x 10(-3) mm per year), which can be remarkably inhibited showing 98.83% of corrosion inhibition efficiency when it is surrounded by those CaFe-LDHs. The novel adsorption mechanisms of these CaFe-LDHs-induced crystals and corresponding corrosion protection properties are elucidated drawing on synergy of memory effects and chemical reactions.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > MAJOR IN ARCHITECTURAL ENGINEERING > 1. Journal Articles
- COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/426)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.