Corrosion resistance of a silane/ceria modified Mg-Al-layered double hydroxide on AA5005 aluminum alloy
- 3 Downloads
The present work aimed at assessing the electrochemical behavior and the corrosion inhibition performance of Mg-Al-layered double hydroxide (LDH) coatings modified with methyltrimethoxysilane (MTMS) and cerium nitrate on AA5005 aluminum alloy. The chemical compositions and surface morphologies of the coatings were investigated by XRD, FT-IR and FE-SEM, while their corrosion resistance was evaluated by electrochemical and immersion tests. An optimum corrosion resistance of the composite coatings was obtained by adding 10−2 mol·L−1 cerium nitrate. An excess addition of cerium nitrate resulted in a loose structure and poor corrosion resistance of the coating. The corrosion mechanism of the composite coatings was proposed and discussed.
Keywordsaluminum alloy layered double hydroxide polymer coating cerium oxide corrosion resistance
Unable to display preview. Download preview PDF.
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51601108 and 21676285), the Natural Science Foundation of Shandong Province (Grant No. ZR2019MB053), the Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents (2017RCJJ015), and the SDUST Research Fund (No. 2014TDJH104).
- Alibakhshi E, Ghasemi E, Mahdavian M, et al. A comparative study on corrosion inhibitive effect of nitrate and phosphate intercalated Zn-Al-layered double hydroxides (LDHs) nanocontainers incorporated into a hybrid silane layer and their effect on cathodic delamination of epoxy topcoat. Corrosion Science, 2017, 115: 159–174CrossRefGoogle Scholar