Corrosion protection of AZ31 magnesium alloy treated with La3＋ modified 3-methacryloxypropyltrimethoxysilane conversion film

This study demonstrated the influence of addition concentration of La3＋ on the anti-corrosion behavior of a 3-methacry- loxypropyltrimethoxysilane （MPS） film formed on AZ31 magnesium alloy. The morphology and surface chemistry of the samples were evaluated through scanning electron microscopy （SEM）...

Full description

Saved in:
Bibliographic Details
Published inJournal of rare earths Vol. 33; no. 6; pp. 647 - 654
Main Author 乔英杰 李文鹏 王桂香 张晓红
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2015
Subjects
AZ31 Mg alloy
AZ31镁合金
corrosion
lanthanum
rare earths
silanes
傅立叶变换红外光谱
扫描电子显微镜
甲基丙烯酰
离子改性
转化膜
镧离子
防腐蚀
silanes
corrosion
AZ31 Mg alloy
lanthanum
rare earths
Online AccessGet full text
ISSN1002-0721
2509-4963
DOI10.1016/S1002-0721(14)60466-X

Cover

More Information
Summary:This study demonstrated the influence of addition concentration of La3＋ on the anti-corrosion behavior of a 3-methacry- loxypropyltrimethoxysilane （MPS） film formed on AZ31 magnesium alloy. The morphology and surface chemistry of the samples were evaluated through scanning electron microscopy （SEM） and Fourier transform infrared spectroscopy （FT-IR）, respectively. The corrosion resistance of the pre-treated AZ31 magnesium alloy was studied during immersion in 0.1 mol/L NaC1 solution, using poten- tiodynamic polarization curves and electrochemical impedance spectra （EIS）. In comparison to MPS film, the low concentration of La3＋ ion modified silane layer exhibited a better anti-corrosion performance, nevertheless, the high concentration of La3＋ ion modified was worse. Results showed that the preferable addition concentration of La3＋ ion in the silane film was 5Х 10-4 mol/L in this experi- ment.
Bibliography:11-2788/TF
This study demonstrated the influence of addition concentration of La3＋ on the anti-corrosion behavior of a 3-methacry- loxypropyltrimethoxysilane （MPS） film formed on AZ31 magnesium alloy. The morphology and surface chemistry of the samples were evaluated through scanning electron microscopy （SEM） and Fourier transform infrared spectroscopy （FT-IR）, respectively. The corrosion resistance of the pre-treated AZ31 magnesium alloy was studied during immersion in 0.1 mol/L NaC1 solution, using poten- tiodynamic polarization curves and electrochemical impedance spectra （EIS）. In comparison to MPS film, the low concentration of La3＋ ion modified silane layer exhibited a better anti-corrosion performance, nevertheless, the high concentration of La3＋ ion modified was worse. Results showed that the preferable addition concentration of La3＋ ion in the silane film was 5Х 10-4 mol/L in this experi- ment.
QIAO Yingjie , LI Wenpeng , WANG Guixiang , ZHANG Xiaohong （Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China）
AZ31 Mg alloy; silanes; lanthanum; corrosion; rare earths
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60466-X