Corrosion Protection of AA2024-T3 by Cerium Malate and Cerium Malate-Doped Sol-Gel Coatings

被引：0
作者：
TianHui Hu [1 ,2 ]
HongWei Shi [2 ]
Tao Wei [2 ]
ShiHua Fan [1 ]
FuChun Liu [2 ]
EnHou Han [2 ]
机构：
[1] Department of Chemistry, Northeastern University
[2] CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences
来源：
Acta Metallurgica Sinica(English Letters) | 2019年 / 32卷 / 07期
关键词：
AA2024-T3; Corrosion inhibitor; Sol-gel coatings; Scanning vibrating electrode technique(SVET); Electrochemical impedance spectroscopy(EIS);
D O I：
暂无
中图分类号：
V252.2 [有色金属（总论）]; TG174.42 [金属防腐剂、缓蚀剂];
学科分类号：
0805 ; 080502 ; 080503 ;
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.
引用
收藏
页码：913 / 924
页数：12
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