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Erosive Behaviour of HVOF Sprayed Coatings:A Review


Affiliations
1 Mechanical Engg. Department, IKGPTU, Kapurthala, 144603, India
2 Mechanical Engg., YCOE, PU Campus, 151302, India
 

Slurry erosion of turbine components in hydro power plants is a serious problem faced all over the world. Researchers are continuously working on investigating the ways to mitigate the effect of slurry erosion. Different techniques are employed to protect the material from deteoriation of its life, techniques such as filtration of the sand particles were carried out to reduce the amount of sand particles in the water which is impacting on the turbine components and designing the shape of turbine components in such a manner so as to mitigate the effect of slurry erosion. Still slurry erosion is most priortize area among the researchers as it is causing heavy economic losses. As a new alternative, researchers are exploring the thermal spray coating technique as an option by which the surface properties of the material will be improved. Thermal spraying is one of the most prominent methods used now a days to prevent the material from abrasive wear, high temperature corrosion, erosive wear and stresses, as it increases the life span of material used in service. High velocity Oxy Fuel (HVOF) spraying is among the thermal spraying techniques which are known for its various characteristics such as providing hardness, wear resistant and dense micro structured coatings. In this paper an attempt has been made to present a state of art review of the work done by various researchers to prevent slurry erosion of hydraulic machine components by using HVOF Spray technique.

Keywords

Thermal Spraying, HVOF, Erosion.
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  • Erosive Behaviour of HVOF Sprayed Coatings:A Review

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Authors

Mithlesh Sharma
Mechanical Engg. Department, IKGPTU, Kapurthala, 144603, India
Deepak Kumar Goyal
Mechanical Engg. Department, IKGPTU, Kapurthala, 144603, India
Gagandeep Kaushal
Mechanical Engg., YCOE, PU Campus, 151302, India

Abstract


Slurry erosion of turbine components in hydro power plants is a serious problem faced all over the world. Researchers are continuously working on investigating the ways to mitigate the effect of slurry erosion. Different techniques are employed to protect the material from deteoriation of its life, techniques such as filtration of the sand particles were carried out to reduce the amount of sand particles in the water which is impacting on the turbine components and designing the shape of turbine components in such a manner so as to mitigate the effect of slurry erosion. Still slurry erosion is most priortize area among the researchers as it is causing heavy economic losses. As a new alternative, researchers are exploring the thermal spray coating technique as an option by which the surface properties of the material will be improved. Thermal spraying is one of the most prominent methods used now a days to prevent the material from abrasive wear, high temperature corrosion, erosive wear and stresses, as it increases the life span of material used in service. High velocity Oxy Fuel (HVOF) spraying is among the thermal spraying techniques which are known for its various characteristics such as providing hardness, wear resistant and dense micro structured coatings. In this paper an attempt has been made to present a state of art review of the work done by various researchers to prevent slurry erosion of hydraulic machine components by using HVOF Spray technique.

Keywords


Thermal Spraying, HVOF, Erosion.

References