Corrosion Behavior of WC-Co Cermet Coatings

2015 ◽  
Vol 819 ◽  
pp. 87-90 ◽  
Author(s):  
Zakiah Kamdi ◽  
C.Y. Phang ◽  
H. Ahmad
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Alkaline Electrolyte ◽  
Electrochemical Test ◽  
Cermet Coatings ◽  
Wear And Corrosion ◽  
Thermally Sprayed Coatings ◽  
Wear And Corrosion Resistance ◽  
Thermally Sprayed ◽  
Sprayed Coatings

Metal-ceramic composite or cermet coatings have become popular due to their enhanced wear and corrosion resistance properties. Cermet consists of ceramic particulate embedded in a metallic binder. WC-Co coatings are often used in applications that require wear resistance, but there are many applications in which thermally sprayed coatings have been deposited on components that operate under both abrasive and corrosive condition. Thus, in this study, the corrosion behavior of WC-12wt%Co in different electrolyte has been evaluated. Electrochemical test has been done in three electrolytes namely 0.5 M hydrochloric acid, HCl, 0.5 M sulfuric acid, H2SO4 and 0.5 M sodium hydroxide, NaOH. It is found that corrosion potential of this coating in acidic environment is more positive compares to in alkaline environment. Both in acid and alkaline electrolyte, binder dissolution were preferential. It may be concluded that this coating have higher corrosion resistance in alkaline electrolyte than in acid electrolyte.

scholarly journals Frictional Wear and Corrosion Behavior of AlCoCrFeNi High-Entropy Alloy Coatings Synthesized by Atmospheric Plasma Spraying

Entropy ◽  
2020 ◽  
Vol 22 (7) ◽  
pp. 740
Author(s):  
Yongkun Mu ◽  
Liangbo Zhang ◽  
Long Xu ◽  
Kondagokuldoss Prashanth ◽  
Nizhen Zhang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Plasma Spraying ◽  
Corrosion Behavior ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Frictional Wear ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance

High-entropy alloy coatings (HEAC) exhibit good frictional wear and corrosion resistances, which are of importance for structure materials. In this study, the microstructure, surface morphology, hardness, frictional wear and corrosion resistance of an AlCoCrFeNi high-entropy alloy coating synthesized by atmospheric plasma spraying (APS) were investigated. The frictional wear and corrosion resistance of the coating are simultaneously improved with an increase of the power of APS. The influence of the APS process on the microstructure and mechanical behavior is elucidated. The mechanisms of frictional wear and corrosion behavior of the AlCoCrFeNi HEAC are discussed in detail.

Wear and Corrosion Resistance of Thermally Sprayed Ceramic Oxide Coatings

1997 ◽  
pp. 421-430
Author(s):  
T. A. Mäntylä ◽  
K. Niemi ◽  
E. Kumpulainen ◽  
J. Knuuttila ◽  
P. Vuoristo
Keyword(s):  
Corrosion Resistance ◽  
Oxide Coatings ◽  
Ceramic Oxide ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance ◽  
Thermally Sprayed

Subsequent sealing of thermally sprayed coatings to increase corrosion resistance

1994 ◽  
Vol 10 (1) ◽  
pp. 46-51 ◽  
Author(s):  
E. Lugscheider ◽  
P. Jakiel ◽  
V. Messerschmidt ◽  
G. Beckschulte
Keyword(s):  
Corrosion Resistance ◽  
Thermally Sprayed Coatings ◽  
Thermally Sprayed ◽  
Sprayed Coatings ◽  
Increase Corrosion Resistance

Influence of heat treatment on surface properties of HVOF deposited WC and Ni-based powder coatings: A review

2021 ◽  
Author(s):  
Gaurav Prashar ◽  
Hitesh Vasudev ◽  
Lalit Thakur
Keyword(s):  
Structure Property ◽  
Wear And Corrosion ◽  
Structure Property Relationship ◽  
Improved Performance ◽  
And Performance ◽  
Wear And Corrosion Resistance ◽  
Tribomechanical Properties ◽  
Thermally Sprayed ◽  
Sprayed Coatings

Abstract Post-spray treatments have recently been popular as a means of improving the overall quality of thermally sprayed coatings, particularly those done using the HVOF technique. Thermally assisted surface treatment of deposited coatings is an effective way to improve the characteristics of coated components for specific applications. The tribomechanical properties of post-treated WC and Ni-based coatings deposited with high-velocity oxy-fuel (HVOF) technique have been addressed. The structure-property correlations concerning the as-sprayed and post-treated coatings have been considered to understand the various mechanisms responsible for improved performance in terms of wear and corrosion resistance. The recent advancement in the post-treatments such as post-processing using microwave hybrid heating, laser-assisted processing and Stationary friction processing have been incorporated in the current review. Comparative studies have been presented to understand the structure-property relationship and performance of WC and Ni-based HVOF sprayed coatings with the help of various characterization techniques in this review article.

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