Corrosion and Multi-Scale Mechanical Behaviour of Plasma Electrolytic Oxidation (PEO) and Hard Anodized (HA) Coatings on AA 2219 Aluminum Alloy

2015 ◽  
Vol 830-831 ◽  
pp. 627-630 ◽  
Author(s):  
A. Venugopal ◽  
J. Srinath ◽  
P. Ramesh Narayanan ◽  
S.C. Sharma ◽  
Koshy M. George
Keyword(s):  
Potentiodynamic Polarization ◽  
Plasma Electrolytic Oxidation ◽  
Electrochemical Corrosion ◽  
Ceramic Coatings ◽  
Electrolytic Coating ◽  
Ha Coating ◽  
Hard Anodizing ◽  
Electrolytic Oxidation ◽  
2219 Aluminum Alloy ◽  
Plasma Electrolytic

The electrochemical corrosion and mechanical properties of ceramic coatings fabricated by plasma electrolytic coating (PEO) and hard anodizing (HA) methods comparatively examined for AA2219. Potentiodynamic polarization results revealed that the corrosion resistance of both coatings are comparable to each other. However, the indentation and scratch testing indicated that the hardness and modulus of the PEO coating was significantly higher when compared to HA coating. The critical load (Lc2) causing adhesive failure of the PEO coating was much high (19N) when compared to HA coating (10N) showing better adhesive strength of the PEO coating.Key words: Plasma electrolytic oxidation (PEO), potentiodynamic polarization, nanoindentation, hard anodizing

Plasma electrolytic oxidation ceramic coatings proceed by porous anodic film

2020 ◽  
Vol 812 ◽  
pp. 152098 ◽  
Author(s):  
Zhong Yang ◽  
Xu-zhen Zhang ◽  
Ye-kang Wu ◽  
Dong-dong Wang ◽  
Xin-tong Liu ◽  
...  
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Ceramic Coatings ◽  
Anodic Film ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Growth characteristics of plasma electrolytic oxidation ceramic coatings on Ti–6Al–4V alloy

2008 ◽  
Vol 254 (13) ◽  
pp. 4084-4091 ◽  
Author(s):  
Zhongping Yao ◽  
Yanli Jiang ◽  
Fangzhou Jia ◽  
Zhaohua Jiang ◽  
Fuping Wang
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Ceramic Coatings ◽  
Growth Characteristics ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Simultaneous Reduction of Wear and Corrosion of Titanium, Magnesium and Zirconium Alloys by Surface Plasma Electrolytic Oxidation Treatment

2008 ◽  
Vol 38 ◽  
pp. 27-35 ◽  
Author(s):  
H.M. Nykyforchyn ◽  
V.S. Agarwala ◽  
M.D. Klapkiv ◽  
V.M. Posuvailo
Keyword(s):  
Corrosion Resistance ◽  
Plasma Electrolytic Oxidation ◽  
Synthesis Method ◽  
Zirconium Alloys ◽  
Ceramic Coatings ◽  
Oxide Ceramic ◽  
Wear And Corrosion ◽  
Electrolytic Oxidation ◽  
Wear And Corrosion Resistance ◽  
Plasma Electrolytic

Titanium, magnesium and zirconium alloys are widely used in industrial applications, which require high wear and corrosion resistance. However current methods of improving these properties often do not satisfy the requirements of service and functional properties. An alternative approach is the application of oxide-ceramic coatings using high temperature process. The coatings are applied by spark discharge plasma in the metal-electrolyte system at high voltages - PEO (plasma electrolytic oxidation) as an oxide synthesis method. This method has shown good results for aluminium alloys and with good prospects to be used for titanium, magnesium and zirconium alloys. Development of PEO technology to improve the wear and corrosion resistance of titanium, magnesium and zirconium alloys is discussed in this paper. It describes the methods for obtaining the required layer-thickness for a specified hardness, porosity, wear and corrosion resistance, sets up the optimal process parameters (voltage/current) by taking the relation of anodic to cathodic currents into account, and establishing the electrolyte content of different dopants.

Characterisation of ceramic coatings produced by plasma electrolytic oxidation of aluminum alloy

2007 ◽  
Vol 447 (1-2) ◽  
pp. 158-162 ◽  
Author(s):  
Wei-Chao Gu ◽  
Guo-Hua Lv ◽  
Huan Chen ◽  
Guang-Liang Chen ◽  
Wen-Ran Feng ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Plasma Electrolytic Oxidation ◽  
Ceramic Coatings ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic
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