In situ fabrication of blue ceramic coatings on wrought Al Alloy 2024 by plasma electrolytic oxidation

2012 ◽  
Vol 30 (2) ◽  
pp. 021302 ◽  
Author(s):  
Zhijiang Wang ◽  
Xueyuan Nie ◽  
Henry Hu ◽  
Riyad O. Hussein
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Ceramic Coatings ◽  
Al Alloy ◽  
In Situ Fabrication ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Influences of Current Density on Tribological Characteristics of Ceramic Coatings on 6061 Al Alloy by Plasma Electrolytic Oxidation

2011 ◽  
Vol 239-242 ◽  
pp. 1892-1895
Author(s):  
Xiao Dong Wang ◽  
Xiao Hong Wu ◽  
Rui Wang ◽  
Song Tao Lu
Keyword(s):  
Current Density ◽  
Plasma Electrolytic Oxidation ◽  
Ceramic Coatings ◽  
Tribological Characteristics ◽  
Al Alloy ◽  
Friction Testing ◽  
Electrolytic Oxidation ◽  
Current Densities ◽  
Plasma Electrolytic ◽  
6061 Al Alloy

Plasma electrolytic oxidation (PEO) of an 6061 Al alloy was accomplished in an electrolyte with sodium hexametaphosphate (10 g/L) and sodium silicate (10 g/L) Coatings were produced at four different current densities (4, 6, 8 and 10 A/dm2). Phase composition, morphology and tribological characteristics of the coatings were studied by X-ray diffraction (XRD), scanning electron microscope (SEM) and ball-on-disk friction testing. The results show that among the four ceramic coatings which were produced under four current densities, the coating produced under the current density of 8 A/dm2 got the lowest wear rate with the value of 4.5 × 10-5 g/m.

Effects of Na2WO4 Additive on Properties of Plasma Electrolytic Oxidation Coatings on 6061 Al Alloy

2012 ◽  
Vol 550-553 ◽  
pp. 1969-1975 ◽  
Author(s):  
Xi Di Chen ◽  
Qi Zhou Cai ◽  
Li Song Yin
Keyword(s):  
Corrosion Resistance ◽  
Plasma Electrolytic Oxidation ◽  
Ceramic Coatings ◽  
Pulse Frequency ◽  
Inhibitory Effect ◽  
Al Alloy ◽  
Discharge Process ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings

Plasma electrolytic oxidation (PEO) ceramic coatings were prepared on 6061 aluminum alloy substrate in silicate based electrolyte with and without Na2WO4additive with different pulse frequency. The composition, surface morphology and corrosion resistance of PEO coatings were investigated by means of SEM, XRD, potentiodynamic polarization and EIS measurement in a 3.5% NaCl solution. These results show that Na2WO4can contributing to the transition from the metastable γ-Al2O3to a better thermal stability α-Al2O3, while has certain inhibitory effect on the deposition of SiO32-anion on the surface during the plasma discharge process. After adding Na2WO4in the electrolyte, the surface layer of PEO coatings are more smoother and less distinctly discharge holes appear which leads to the PEO coatings have better corrosion resistance than those of samples coated in the electrolyte without Na2WO4additive.

ffect of Na2WO4 in electrolyte on mechanical properties of oxide layer on Al alloy via plasma electrolytic oxidation

2015 ◽  
Vol 53 (8) ◽  
pp. 535-540 ◽  
Author(s):  
Young Gun Ko ◽  
Dong Hyuk Shin ◽  
Hae Woong Yang ◽  
Yeon Sung Kim ◽  
Joo Hyun Park ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oxide Layer ◽  
Plasma Electrolytic Oxidation ◽  
Al Alloy ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic
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