Construction of porous anodic oxide/Ce-MOFs film by induced electrodeposition and its corrosion resistance

Aluminum alloy has good expansion and low hardness. However, aluminum alloy is susceptible to cor-rosion in humid environments, limiting their application. In this experiment, we adopted an efficient and facile method to prepare porous anodic oxide (PAO) films and PAO/Ce-MOFs composite films. It can be characterized by SEM, EDS, FT-IR, XRD, XPS and other test methods. The corrosion resistance is studied by neutral salt spray test and electrochemical test. Electrochemical data show that the resistance of PAO/Ce-MOFs film is three orders of magnitude higher than that of aluminum alloy substrate, and the corrosion current density is three orders of magnitude lower than that of aluminum alloy substrate, reaching 1.621 x 10-8 A/cm2. The corrosion resistance efficiency is 99.92%. The salt spray experiment shows that the film can maintain the corrosion resistance for 30d. The results show that Ce-MOFs coating can effectively improve the corrosion resistance of aluminum alloy. Therefore, this study provides a new approach in the application of MOFs materials in the direction of anticorrosion. (c) 2023 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.