scholarly journals Sealing Treatment of Plasma-Sprayed Cr3C2-NiCr/Al2O3-TiO2 Coating by Aluminum Phosphate Sealant Containing Al2O3 Nanoparticles

2021 ◽  
Author(s):  
Tuan Van Nguyen ◽  
Tuan Anh Nguyen ◽  
Ha Thi Pham ◽  
Ly Thi Pham ◽  
Phuong Thi Nguyen ◽  
...  
Keyword(s):  
Aluminum Phosphate ◽  
Tio2 Coating ◽  
Al2o3 Nanoparticles ◽  
Plasma Sprayed ◽  
Sealing Treatment

Sealing Treatment of Plasma Sprayed Cr3C2-NiCr/Al2O3-TiO2 Coating by Aluminum Phosphate Sealant Containing Al2O3 Nanoparticles

2021 ◽  
Author(s):  
Tuan Nguyen Van ◽  
Tuan Anh Nguyen ◽  
Ha Pham Thi ◽  
Ly Pham Thi ◽  
Phuong Nguyen ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Impedance ◽  
Aluminum Phosphate ◽  
Al2o3 Nanoparticles ◽  
Treatment Efficiency ◽  
Typical Structure ◽  
Sprayed Coating ◽  
Plasma Sprayed ◽  
Sealing Treatment ◽  
Sprayed Coatings

Abstract A typical structure of thermal spray coatings consisted of molten particles, semi-molten particles, oxides, pores and cracks. These factors caused the porosity of sprayed coatings, leading to a great influence on the coating properties, especially their wear-corrosion resistance. In this study, a post-spray sealing treatment of Cr3C2-NiCr/Al2O3-TiO2 plasma sprayed coatings was carried out, then their corrosion properties were evaluated, before and after the treatment. For sealing process, aluminum phosphate (APP) containing aluminum oxide (Al2O3) nanoparticles (~10 nm) was used. The permeability of APP into the sprayed coating was analyzed by scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS). The treatment efficiency for porosity and corrosion resistance of sprayed coatings were evaluated by electrochemical measurements, such as the potentiodynamic polarization and electrochemical impedance spectroscopy. In addition, the wear-corrosion resistance of the sealed coating was examined in 3.5 wt.% NaCl circulation solution containing 0.25 wt.% SiO2 particles. The obtained results showed that APP penetrated deeply through the sprayed coating. The incorporation of Al2O3 nanoparticles into APP sealant enhanced the treatment efficiency of porosity for sprayed coating. The effect of the post-treatment on corrosion protection of the sprayed coating has been discussed.

Effect of Sealing Treatment on Corrosion Resistance of Plasma-Sprayed NiCrAl/Cr2O3-8 wt.%TiO2 Coating

2010 ◽  
Vol 20 (3) ◽  
pp. 508-513 ◽  
Author(s):  
Jingjing Zhang ◽  
Zehua Wang ◽  
Pinghua Lin ◽  
Wenhuan Lu ◽  
Zehua Zhou ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Tio2 Coating ◽  
Plasma Sprayed ◽  
Sealing Treatment

Influence of Ultrasonic Sealing Treatment with Aluminum Phosphate on Properties of Al2O3-TiO2 Plasma Sprayed Ceramic Coating

2021 ◽  
Author(s):  
Tuan Nguyen Van ◽  
Tuan Anh Nguyen ◽  
Phuong Nguyen Thi ◽  
Ha Pham Thi ◽  
Ly Pham Thi ◽  
...  
Keyword(s):  
Ceramic Coating ◽  
Erosion Resistance ◽  
Electrochemical Impedance ◽  
Aluminum Phosphate ◽  
Ceramic Coatings ◽  
Corrosion And Wear ◽  
Tio2 Ceramic ◽  
Plasma Sprayed ◽  
Sealing Treatment ◽  
Thermally Sprayed

Abstract Thermally sprayed Al2O3-TiO2 ceramic coatings provide exceptional hardness and corrosion and wear resistance, but the high velocities at which they are applied result in an inherently porous structure that requires some type of remediation. This study evaluates the effectiveness of ultrasonic aluminum phosphate sealing treatments on plasma sprayed Al2O3-40TiO2 ceramic coatings. The sealants were applied with and without ultrasonication (20-40 kHz) and were assessed using SEM/EDX analysis, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). Test data indicate that optimum sealing, corresponding to the highest values of corrosion protection and erosion resistance, are achieved under ultrasonication at 30 kHz for 5 hours.

scholarly journals Impact of Plasma Spray Variables Parameters on Mechanical and Wear Behaviour of Plasma Sprayed Al2O3 3%wt TiO2 Coating in Abrasion and Erosion Application

2012 ◽  
Vol 41 ◽  
pp. 1689-1695 ◽  
Author(s):  
Abdul Rahim Mahamad Sahab ◽  
Nor Hayati Saad ◽  
Salmiah Kasolang ◽  
Juri Saedon
Keyword(s):  
Plasma Spray ◽  
Tio2 Coating ◽  
Wear Behaviour ◽  
Plasma Sprayed

Effect of Y2O3 addition on tribological properties of plasma sprayed Al2O3-13% TiO2 coating

2020 ◽  
Vol 46 (8) ◽  
pp. 11799-11810 ◽  
Author(s):  
Sanket Mehar ◽  
S.G. Sapate ◽  
Nitesh Vashishtha ◽  
Pranay Bagde
Keyword(s):  
Tribological Properties ◽  
Tio2 Coating ◽  
Plasma Sprayed ◽  
Y2o3 Addition

Wear mechanism of plasma-sprayed TiO2 coating against stainless steel

Wear ◽  
1996 ◽  
Vol 196 (1-2) ◽  
pp. 238-242 ◽  
Author(s):  
W.W. Dai ◽  
C.X. Ding ◽  
J.F. Li ◽  
Y.F. Zhang ◽  
P.Y. Zhang
Keyword(s):  
Stainless Steel ◽  
Wear Mechanism ◽  
Tio2 Coating ◽  
Plasma Sprayed

Microstructure, wear and mechanical properties of plasma sprayed TiO2 coating on Al–SiC metal matrix composite

2019 ◽  
Vol 19 (3) ◽  
pp. 756-767 ◽  
Author(s):  
P. Dinesh Babu ◽  
B. Prasannakumar ◽  
P. Marimuthu ◽  
R.K. Mishra ◽  
T. Ram Prabhu
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Tio2 Coating ◽  
Plasma Sprayed

Microstructural Study of Aluminum Phosphate-Sealed, Plasma-Sprayed Chromium Oxide Coating

2002 ◽  
Vol 11 (2) ◽  
pp. 253-260 ◽  
Author(s):  
Minnamari Vippola ◽  
Samppa Ahmaniemi ◽  
Petri Vuoristo ◽  
Toivo Lepistö ◽  
Tapio Mäntylä ◽  
...  
Keyword(s):  
Chromium Oxide ◽  
Oxide Coating ◽  
Aluminum Phosphate ◽  
Microstructural Study ◽  
Plasma Sprayed
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