文献类型：期刊文献

英文题名：In-situ grown Mg-Fe-inhibitor-LDH conversion film on steel for improving corrosion protection in the chloride contaminated environment

作者：Tian, Yuwan[1,2];Wang, Yiliang[1];Wen, Cheng[1,3];Xi, Xiaohui[2,3];Wang, Nanchuan[1];Li, Qibo[1,2];Hu, Jiezhen[2,3]

机构：[1]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Zhanjiang Key Lab Corros & Protect Ocean Engn & Eq, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Guangdong Prov Ocean Equipment & Mfg Engn Technol, Zhanjiang 524088, Peoples R China

年份：2025

卷号：46

外文期刊名：MATERIALS TODAY COMMUNICATIONS

收录：SCI-EXPANDED(收录号：WOS:001470061000001)、、EI(收录号：20251518215045)、Scopus(收录号：2-s2.0-105002229189)、WOS

基金：The authors acknowledge the support of program for Scientific Research Start-up Funds of Guangdong Ocean University (No. 060302062317) , Innovation Team Project for Ordinary Universities in Guangdong Province (No. 2024KCXTD041) , Guangdong Provincial Basic and Applied Basic Fund, China (No. 2021A1515110382) , and Science and Technology Program of Zhanjiang (No. 2021E05003) .

语种：英文

外文关键词：Conversion film; Corrosion inhibitor; Layered double hydroxide; Steel; Corrosion protection

外文摘要：Use of layered double hydroxide (LDH) conversion films is an effective method for enhancing the corrosion protection of metals, which has been extensively studied on non-ferrous metals. Steel, being the most commonly used engineering material, would significantly benefit from such technology if LDH films could be formed on its surface. In this study, an Mg-Fe-pAB-LDH conversion film is successfully grown in situ on Cr-alloy steel. The properties of the Mg-Fe-pAB-LDH film and its precursor Mg-Fe-CO3-LDH film are characterized using SEM, XRD, EDS, XPS, and electrochemical methods. The results show that both LDH films are composed of cross-linked blade-like flakes oriented perpendicular to the substrate, with numerous intersecting voids. The incorporation of pAB- inhibitor ions and CaCO3 by-products into LDH film significantly improves its corrosion resistance in chloride-contaminated environments. The inhibition efficiencies of the Mg-Fe-pAB-LDH film in 0.1, 0.3, and 0.6 mol/L NaCl solutions are 99 %, 97 %, and 68 %, respectively. This superior protection is attributed to three primary mechanisms: physical barrier of LDH film with CaCO3 particle, chloride absorption into LDH flakes, and release of inhibitor ions from LDH film. Typically, the Mg-Fe-pAB-LDH film have a Cl- adsorption capacity of 0.368 mol/m2 and a pAB- release capacity of 0.217 mol/m2. Meanwhile, the corrosion protection performance decreases as the chloride concentration increases, indicating that the LDH film used for high-chloride environments need further optimization.