Influence of the Treatment Time on the Surface Chemistry and Corrosion Behavior of Cerium-Based Conversion Coatings on the AZ91D Magnesium Alloy

被引：0
作者：
Ribeiro, Eloana Patricia [1 ]
Couto, Antonio Augusto [1 ]
de Oliveira, Leandro Antonio [2 ]
Antunes, Renato Altobelli [2 ]
机构：
[1] IPEN, CCTM, Sao Paulo, SP, Brazil
[2] Univ Fed Abc, Ctr Engn Modelagem & Ciencias Sociais Aplicadas C, Santo Andre, SP, Brazil
来源：
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2019年 / 22卷
关键词：
AZ91D alloy; cerium conversion coating; XPS; corrosion; ELECTROCHEMICAL-BEHAVIOR; AZ31; RESISTANCE; FILMS; MICROSTRUCTURE; ANTICORROSION; PERFORMANCE; MECHANISM; EVOLUTION;
D O I：
10.1590/1980-5373-MR-2018-0862
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The aim of the present work was to investigate the effect of the treatment time on the surface chemistry and corrosion behavior of cerium-based chemical conversion coatings on the AZ91D magnesium alloy. The conversion coating was prepared by the immersion technique from a bath consisting of 0.05 mol.L-1 Ce(NO3)(3)center dot 6H(2)O and 0.254 mol.L-1 FLO, (30 wt.%) for times ranging from 20 s to 120 s. The surface chemistry was examined by X-ray photoelectron spectroscopy (XPS). The corrosion behavior was assessed by electrochemical impedance spectroscopy and potentiodynamic polarization. XPS analysis detected the presence of cerium oxides (Ce2O3 and CeO2) and cerium/magnesium hydroxides. The best corrosion behavior was observed for the treatment conducted for 60 s. The results are discussed with respect to coating morphology and composition.
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页数：10
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[1]   A simple one step cerium conversion coating formation on to magnesium alloy and electrochemical corrosion performance [J].
Arthanari, Srinivasan ;
Shin, Kwang Seon .
SURFACE & COATINGS TECHNOLOGY, 2018, 349 :757-772
[2]   Cerium-based modification treatment of Mg-Al hydrotalcite film on AZ91D Mg alloy assisted with alternating electric field [J].
Ba, Zhixin ;
Dong, Qiangsheng ;
Zhang, Xiaobo ;
Qiang, Xinfa ;
Cai, Zhengyang ;
Luo, Xian .
JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 695 :106-113
[3]   Study on corrosion behavior of Mg-based bulk metallic glasses in NaCl solution [J].
Babilas, Rafal ;
Bajorek, Anna ;
Simka, Wojciech ;
Babilas, Dorota .
ELECTROCHIMICA ACTA, 2016, 209 :632-642
[4]   Ceria/stannate multilayer coatings on AZ91D Mg alloy [J].
Bagala, P. ;
Lamastra, F. R. ;
Kaciulis, S. ;
Mezzi, A. ;
Montesperelli, G. .
SURFACE & COATINGS TECHNOLOGY, 2012, 206 (23) :4855-4863
[5]   Rare earth conversion coating of magnesium alloy AZ91D [J].
Bai, Liqun ;
Li, Di ;
Guo, Min ;
Xin, Jing .
2006 BIMW: 2006 BEIJING INTERNATIONAL MATERIALS WEEK, PTS 1-4: MAGNESIUM, 2007, 546-549 :555-+
[6]   Ce 3d XPS investigation of cerium oxides and mixed cerium oxide (CexTiyOz) [J].
Beche, Eric ;
Charvin, Patrice ;
Perarnau, Danielle ;
Abanades, Stephane ;
Flamant, Gilles .
SURFACE AND INTERFACE ANALYSIS, 2008, 40 (3-4) :264-267
[7]   Characterisation by EIS of ternary Mg alloys synthesised by mechanical alloying [J].
Brett, CMA ;
Dias, L ;
Trindade, B ;
Fischer, R ;
Mies, S .
ELECTROCHIMICA ACTA, 2006, 51 (8-9) :1752-1760
[8]   Microstructural evolution of cerium-based coatings on AZ31 magnesium alloys [J].
Castano, Carlos E. ;
O'Keefe, Matthew J. ;
Fahrenholtz, William G. .
SURFACE & COATINGS TECHNOLOGY, 2014, 246 :77-84
[9]  
Chen L, 2015, RARE METAL MAT ENG, V44, P333, DOI 10.1016/S1875-5372(15)30030-8
[10]   Development of the highly corrosion resistant AZ31 magnesium alloy by the addition of a trace amount of Ti [J].
Choi, H. Y. ;
Kim, W. J. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 664 :25-37
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