Hydrothermal Sealing of Plasma Electrolytic Oxidation Coatings Developed on AZ31 Alloy

被引：0
|
作者：
L. Toro
A. A Zuleta
E. Correa
F. Echeverría
机构：
[1] Universidad de Antioquia UdeA,Facultad de Ingeniería, Centro de Investigación, Innovación y Desarrollo de Materiales CIDEMAT
[2] Universidad Pontificia Bolivariana UPB,Facultad de Diseño Industrial, Grupo de Investigación de Estudios en Diseño
[3] Universidad de Medellín UdeM, GED
来源：
Journal of Materials Engineering and Performance | 2022年 / 31卷
关键词：
anodic coatings; corrosion resistance; magnesium alloys; plasma electrolytic oxidation; sealing treatment;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this work, a PEO coating on AZ31 magnesium alloy was post-treated in three different solutions containing NaF, Na2CO3 and NaAlO2, with the aim of sealing the anodic film and consequently increasing the corrosion resistance of the material. The morphology and chemical composition of the resulting coatings were analyzed by scanning electron microscopy, x-ray diffraction and Fourier transform infrared spectroscopy. Samples were tested in a salt spray chamber, and corrosion rate was evaluated by the hydrogen evolution technique. It was found that a pore sealing treatment of 90 minutes in the solution containing a mixture of NaF and NaAlO2 resulted in an increase in the corrosion resistance of the PEO coating.
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页码：9768 / 9776
页数：8
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