摘要
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.
基金
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)
the SDUST Research Fund(No.2014TDJH104).
