文献类型：期刊文献

英文题名：In-Situ Synthesis and Synergistic Anticorrosion Performance of the Sr5(PO4)3OH/Zn/Al-LDH Composite with an Intercalated Spherical Structure

作者：Miao, Min[1];Feng, Zhou-Tao[1];Zhao, Xin-Yu[1];Huang, Yu-Hui[2];Liu, Jin-Ku[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China

年份：2025

卷号：64

期号：6

起止页码：3340

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20250617810679);WOS:【SCI-EXPANDED(收录号:WOS:001409952100001)】；

基金：This work was supported by the National Natural Science Foundation of China (grant 22378124) and the Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province (grant 2023CL04).

语种：英文

外文关键词：Aluminum coatings - Aluminum compounds - Aluminum corrosion - Corrosion rate - Corrosion resistant coatings - Electrochemical corrosion - Electrolytes - Intercalation - Intercalation compounds - Ion exchange - Photodissociation - Strontium compounds - Zinc alloys - Zinc coatings

摘要：Capturing corrosive ions in corrosive media is an important method to inhibit corrosion. The strontium hydroxyphosphate/zinc/aluminum layered double hydroxide (Sr-HAP/LDH) composite with an intercalated spherical structure was effectively synthesized using the in-situ growth method, and it possesses multiple synergistic anticorrosion advantages. The combination of zinc/aluminum layered double hydroxide (Zn/Al-LDH) and strontium hydroxyphosphate (Sr-HAP) improves the specific capacitance, enhances electron storage, and reduces electron transfer, thereby lowering the corrosion rate. The intercalated spherical structure of the Sr-HAP/LDH composite effectively blocks electrolyte penetration. Additionally, through the Zn/Al-LDH immobilization mechanism and anion exchange, the Sr-HAP/LDH composite releases PO4 3- from the interlayer to chelate with Fe2+ and Fe3+, while trapping the corrosive Cl- ions within the interlayer. The electrochemical tests showed that the corrosion resistance of the Sr-HAP/LDH composite with multiple corrosion protections was 340.0% higher than that of epoxy resin and 190.4% higher than that of Sr-HAP coatings. This research offers an innovative approach for designing efficient anticorrosion materials, with significant theoretical implications and promising practical applications.