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

被引：12
|
作者：
Hu, Tian-Hui [1 ,2 ]
Shi, Hong-Wei [2 ]
Wei, Tao [2 ]
Fan, Shi-Hua [1 ]
Liu, Fu-Chun [2 ]
Han, En-Hou [2 ]
机构：
[1] Northeastern Univ, Dept Chem, Shenyang 110819, Liaoning, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2019年 / 32卷 / 07期
基金：
中国国家自然科学基金;
关键词：
AA2024-T3; Corrosion inhibitor; Sol-gel coatings; Scanning vibrating electrode technique (SVET); Electrochemical impedance spectroscopy (EIS); ALUMINUM-ALLOY; PURE ALUMINUM; INHIBITION; DEPOSITION; 2024-T3; EIS;
D O I：
10.1007/s40195-018-0846-x
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
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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