Corrosion Protection of AA2024-T3 by Cerium Malate and Cerium Malate-Doped Sol-Gel Coatings
来源期刊：Acta Metallurgica Sinica2019年第7期
论文作者：Tian-Hui Hu Hong-Wei Shi Tao Wei Shi-Hua Fan Fu-Chun Liu En-Hou Han
文章页码：913 - 924
摘 要：Cerium malate（CeMal）was tested as a corrosion inhibitor for AA2024-T3 in this work.Corrosion inhibition on bare AA2024-T3 indicated that the inhibiting effect was a result of the synergistic effect of cerium cations and maleic anions.The corrosion of AA2024-T3 was stagnated by greatly reducing the corrosion current when CeMal was present in NaCl solutions.CeMal was adsorbed on the surface of AA2024-T3 forming a protective film in the initial stage.Then,cerium cations transformed to cerium oxide/hydroxides,precipitating on the cathode sites to inhibit the further corrosion.The electrochemical impedance spectra results of the sol-gel coatings proved that CeMal was an effective corrosion inhibitor in the sol-gel coatings to provide corrosion protection for AA2024-T3.
Tian-Hui Hu，Hong-Wei Shi，Tao Wei，Shi-Hua Fan，Fu-Chun Liu，En-Hou Han
Department of Chemistry, Northeastern UniversityCAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences
摘 要：Cerium malate（CeMal）was tested as a corrosion inhibitor for AA2024-T3 in this work.Corrosion inhibition on bare AA2024-T3 indicated that the inhibiting effect was a result of the synergistic effect of cerium cations and maleic anions.The corrosion of AA2024-T3 was stagnated by greatly reducing the corrosion current when CeMal was present in NaCl solutions.CeMal was adsorbed on the surface of AA2024-T3 forming a protective film in the initial stage.Then,cerium cations transformed to cerium oxide/hydroxides,precipitating on the cathode sites to inhibit the further corrosion.The electrochemical impedance spectra results of the sol-gel coatings proved that CeMal was an effective corrosion inhibitor in the sol-gel coatings to provide corrosion protection for AA2024-T3.
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