Electrodeposition of ceria-based layers on zinc electroplated steel

被引：37
作者：
Hamlaoui, Y. [1 ,2 ]
Remazeilles, C. [1 ]
Bordes, M. [3 ]
Tifouti, L. [4 ]
Pedraza, F. [1 ]
机构：
[1] Univ La Rochelle, LEMMA, F-17042 La Rochelle 1, France
[2] Ctr Univ Souk Ahras, Inst Sci & Sci Ingenieur, Souk Ahras 41000, Algeria
[3] Ctr Commun Anal, FR CNRS 3097, FR EDD, F-17071 La Rochelle 9, France
[4] Univ Badji Mokhtar, Lab Genie Environm, El Hadjar Annaba 23020, Algeria
来源：
CORROSION SCIENCE | 2010年 / 52卷 / 03期
关键词：
Zn-electroplated steel; PEG; Raman; FT-IR; DSC; CeO2; electrodeposition; CONVERSION COATINGS; CERIUM(III) NITRATE; CORROSION BEHAVIOR; HYDROGEN EVOLUTION; SURFACE-TREATMENT; GALVANIZED STEEL; ALUMINUM-ALLOYS; OXIDE; PROTECTION; INHIBITORS;
D O I：
10.1016/j.corsci.2009.11.027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
CeO2 layers were electrodeposited on a Zn-electroplated steel from relatively high concentrations of cerium nitrate. Increasing the current density resulted in a better coverage of the surface but cracks also appeared. Partial dissolution of the substrate occurred, but no defined conversion layer was observed by SEM. XRD, Raman and FT-IR indicated however the formation of zinc hydroxides and hydrozincite as corrosion products. The addition of polyethylene glycol (PEG) limited such dissolution. DSC results showed that PEG was trapped in the coating. This limited the reduction of water, hence to decrease the number of cracks. The coatings microstructure remained however similar. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1020 / 1025
页数：6
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