The Structure Property Relationship of Erosion Resistant Thermal Spray Coatings

1998 ◽  
Author(s):  
R.C. Tucker ◽  
A.A. Ashari
Keyword(s):  
Thermal Spray ◽  
Elevated Temperatures ◽  
Erosion Resistance ◽  
Industrial Applications ◽  
Thermal Spray Coatings ◽  
Steam Turbines ◽  
Structure Property ◽  
Spray Coatings ◽  
Relationship Of ◽  
The Relationship

Abstract Thermal spray coatings are widely used for erosion resistance, but the relationship between the microstructure of the coatings and their erosion resistance is not well understood. In this paper the performance of several commonly used coatings at ambient and elevated temperatures is reviewed in light of the coatings' structure and compared with a new coating. Two high temperature industrial applications, solid particle erosion in steam turbines and alumina-based erosion have been chosen to illustrate the significance of a coating's structure on its performance.

Processing and Thermal Cycling Effects on the Erosion Behavior of Thermal Barrier Coatings

1997 ◽  
Author(s):  
J. Gutleber ◽  
S. Sampath ◽  
S. Usmani
Keyword(s):  
Thermal Spray ◽  
Thermal Barrier Coatings ◽  
Room Temperature ◽  
Erosion Resistance ◽  
Thermal Spray Coatings ◽  
Thermal Barrier ◽  
Powder Particle Size ◽  
Barrier Coatings ◽  
Erosion Behavior ◽  
Spray Coatings

Abstract The erosion behavior of yttria stabilized zirconia thermal barrier coatings is investigated with respect to powder particle size. Solid particle erosion experiments were conducted at room temperature to determine the mechanism of erosion for ceramic thermal spray coatings. Testing was carried out on as-sprayed as well as thermally cycled specimens. Porosity and bend testing measurements indicate that a decrease in porosity and an increase in inter-lamellar strength leads to an increase in the erosion resistance of ceramic thermal spray coatings.

Principles and Applications of Thermal Spray Coatings

2021 ◽  
pp. 31-70
Author(s):  
John Henao ◽  
Carlos A. Poblano-Salas ◽  
Fabio Vargas ◽  
Astrid L. Giraldo-Betancur ◽  
Jorge Corona-Castuera ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Thermal Spraying ◽  
Industrial Applications ◽  
Thermal Spray Coatings ◽  
Flame Spray ◽  
Spray Coatings ◽  
Thermal Barriers ◽  
Energy Conversion Devices ◽  
Thermally Sprayed ◽  
Sprayed Coatings

The goal of the chapter is to address the fundamental theory of thermal spraying and its modern industrial applications, in particular, those involving flame spray, HVOF, plasma spray, and cold spray processes. During the last 30 years, thousands of manuscripts and various book chapters have been published in the field of thermal spray, displaying the evolution of thermally sprayed coatings in many industrial applications. Thermal spray coatings are currently interesting for different modern applications including prosthesis, thermal barriers, electrochemical catalysis, electrochemical energy conversion devices, biofouling, and self-repairing surfaces. The chapter will explain the fundamental principles of the aforementioned thermal spraying processes and discuss the effect of different controlling parameters on the final properties of the produced coatings. This chapter will also explore current and future industrial applications of thermal spray coatings.

Slurry and cavitation erosion resistance of thermal spray coatings

Wear ◽  
2009 ◽  
Vol 267 (1-4) ◽  
pp. 160-167 ◽  
Author(s):  
J.F. Santa ◽  
L.A. Espitia ◽  
J.A. Blanco ◽  
S.A. Romo ◽  
A. Toro
Keyword(s):  
Thermal Spray ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Thermal Spray Coatings ◽  
Spray Coatings ◽  
Cavitation Erosion Resistance

Elevated Temperature Erosion Resistance of Several Experimental Amorphous Thermal Spray Coatings

1998 ◽  
Author(s):  
B. Wang
Keyword(s):  
Elevated Temperature ◽  
Thermal Spray ◽  
Erosion Resistance ◽  
Thermal Spray Coatings ◽  
Test Results ◽  
Hvof Coating ◽  
Spray Coatings ◽  
Erosion Test ◽  
Sprayed Coatings ◽  
Better Than

Abstract The elevated temperature erosion resistance of experimental amorphous thermal spray coatings was determined in a laboratory elevated temperature erosion tester. Test conditions attempted to simulate the erosion conditions found at the combustor waterwall tubes in fossil fuel fired boilers. Erosion tests were conducted on four experimental amorphous thermal spray coatings, using the bed ash retrieved from an operating coal fired boiler. An experimental arcspray process was used to spray coatings. These results were compared with erosion test results of two common structural materials, two commercially available arc-sprayed coatings, and a proprietary HVOF coating. Test results indicated that the Duocor coating had the highest erosion resistance among the four experimental coatings, it showed equal resistance to the HVOF coating (DS-200). Compared to AISI 1018 steel, both Duocor and DS-200 coatings reduced material wastage by 26-fold. Other test results indicated that the XJ-16, 60T and Armacor M coatings had equal erosion resistance reducing material wastage approximately 7-fold, while Arrnacor CW reduced by IO-fold. Only slightly better than the unprotected 1018 steel, the X-20 coating performed poorly on erosion tests. The high erosion resistance of Duocor and DS-200 coatings was attributed to their high densities and fine splat structures.

A review of thermal spray coatings for protection of steels from degradation in coal fired power plants

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Deepak Dhand ◽  
Parlad Kumar ◽  
Jasmaninder Singh Grewal
Keyword(s):  
Thermal Spray ◽  
Power Plants ◽  
Industrial Applications ◽  
Substrate Material ◽  
Thermal Spray Coatings ◽  
Maintenance Cost ◽  
Metallic Surfaces ◽  
Material Loss ◽  
Coating Materials ◽  
Spray Coatings

Abstract In coal fired power plants, the metallic surfaces such as boiler tubes, walls of combustion chambers and other parts degrade by corrosion, erosion and abrasion. It happens due to the hot gaseous environment, steam oxidation and presence of hard minerals and impurities in the coal. It is very important to protect these surfaces from material loss, otherwise it would lead to increased repair and maintenance cost along with decreased plant efficiency. In this paper, the role of thermal spray coatings has been studied for the protection of different steel grades exposed to such degrading conditions at high temperatures, in coal-based power plants. A comprehensive study has been done by analysing and comparing the work done by various researchers. Some recent advancements related to coating materials and modification in coating techniques have also been studied. This paper would be helpful for the researchers to get an idea for selecting an appropriate substrate material and coating material for industrial applications.

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