The Influence of Current Density and Frequency on the Microstructure and Corrosion Behavior of Plasma Electrolytic Oxidation Coatings on Ti6Al4V

被引：0

作者：

H. Khanmohammadi

S. R. Allahkaram

A. Igual Munoz

N. Towhidi

机构：

[1] University of Tehran,Mechanically Assisted Corrosion Laboratory, School of Metallurgy and Materials Engineering, College of Engineering

[2] Universitat Politècnica de València,Instituto Universitario de Seguridad Industrial Radiofísica y Medioambiental

来源：

Journal of Materials Engineering and Performance | 2017年 / 26卷

关键词：

corrosion resistance; current density; frequency; plasma electrolyte oxidation; titanium alloy;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effect of processing current density and frequency on the microstructure and corrosion behavior of the PEO coatings was studied. Coatings were characterized using FESEM, EDS, potentiodynamic polarization and EIS. The results indicated that the surface roughness, porosity and Al/Ti chemical value on the surface of the coatings increase with an increase in the current density and a decrease in the frequency of the PEO process. Corrosion investigations showed a relation between a mixed structural parameter (that contains thickness, porosity percentage and average pore diameter of the coatings) and the corrosion resistance of the PEO coatings. EIS data showed that higher coating thickness, lower surface porosity percentage and smaller pore diameter lead to the higher corrosion resistance.

引用

页码：931 / 944

页数：13

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