Enhancement of wear and corrosion resistance of iron-based hard coatings deposited by high-velocity oxygen fuel (HVOF) thermal spraying

2014 ◽  
Vol 249 ◽  
pp. 24-41 ◽  
Author(s):  
Wu-Han Liu ◽  
Fuh-Sheng Shieu ◽  
Wei-Tien Hsiao
Keyword(s):  
Corrosion Resistance ◽  
High Velocity ◽  
Thermal Spraying ◽  
Hard Coatings ◽  
High Velocity Oxygen Fuel ◽  
Wear And Corrosion ◽  
Hvof Thermal Spraying ◽  
Iron Based ◽  
Wear And Corrosion Resistance ◽  
Oxygen Fuel

scholarly journals Fabrication, Wear, and Corrosion Resistance of HVOF Sprayed WC-12Co on ZE41 Magnesium Alloy

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 502 ◽  
Author(s):  
Sonia García-Rodríguez ◽  
Antonio Julio López ◽  
Victoria Bonache ◽  
Belén Torres ◽  
Joaquín Rams
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Thermal Spraying ◽  
Electrochemical Corrosion ◽  
High Energy ◽  
Wear And Corrosion ◽  
Wear And Corrosion Resistance ◽  
Oxygen Fuel ◽  
Mass Increase ◽  
Temperature Melting

This study shows that WC-12Co coatings with low porosity and high wear and corrosion resistance can be applied by high velocity oxygen-fuel (HVOF) on a low melting and highly flammable ZE41 magnesium alloy. This provides a novel and promising use of the high-energy thermal spraying technique on low temperature melting substrates. The spraying distance used was 300 mm, which is between two and three times the recommended distanced for HVOF coating with WC-12Co on steels. Despite this, the WC-12Co coatings obtained were homogeneous, crack-free, and dense. The coatings were very well adhered to the substrates and the spraying distance allowed avoiding any thermal affectation of the substrate. The thickness of the coatings was limited to 45 μm to avoid a big mass increase in the samples. The effect of the number of layers, the O2/H2 ratio and the gas transport flow in the coating was studied. The coatings reduced the wear rate of the substrate by 104 times, making them wear resistant. Electrochemical corrosion tests were conducted to study the corrosion protection of the coatings, showing that it is possible to protect the magnesium substrate for 96 h in contact with 3.5 wt.% NaCl aqueous solution.

scholarly journals Mathematical Modeling of High Velocity Oxygen Fuel Thermal Spraying: An Overview

2000 ◽  
Author(s):  
D. Cheng ◽  
G. Trapaga ◽  
J. W. McKelliget ◽  
E. J. Lavernia
Keyword(s):  
High Velocity ◽  
Thermal Spraying ◽  
High Velocity Oxygen Fuel ◽  
Combustion Gas ◽  
Hvof Thermal Spray ◽  
Hvof Thermal Spraying ◽  
Coating Formation ◽  
Versatile Technique ◽  
Thermal Spray Processes ◽  
Oxygen Fuel

Abstract High velocity oxygen fuel (HVOF) thermal spraying is a versatile technique widely used for the manufacture of coatings from various materials system. The physical, mechanical, and chemical characteristics of a coating are critically influenced by the operating parameters used to obtain maximum coating performance while minimizing experimentation. In this paper, modeling of HVOF thermal spray processes is reviewed, paying particular attention to combustion, gas/particle dynamics, particle impingement, and coating formation.

COLMONOY NO. 43HV

Alloy Digest ◽  
2008 ◽  
Vol 57 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
High Velocity ◽  
Base Alloy ◽  
Heat Treating ◽  
High Velocity Oxygen Fuel ◽  
Nickel Base Alloy ◽  
Nickel Base ◽  
Oxygen Fuel

Abstract Colmonoy No. 43HV comprises a nickel-base alloy recommended for hard surfacing parts to resist wear, corrosion, heat, and galling. Deposits that have moderate hardness have increased ductility and slightly less resistance to abrasion than Colmonoy 53HV. Deposits can be finished by grinding or machined with carbide tooling. Colmonoy No. 43HV is supplied as an atomized powder specially sized for application with high-velocity oxygen fuel (HVOF) systems. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance and surface qualities as well as heat treating and surface treatment. Filing Code: Ni-664. Producer or source: Wall Colmonoy Corporation.

scholarly journals Multi-Walled CNT Reinforcement to Thermal Spray Coatings

2018 ◽  
Vol 7 (2) ◽  
pp. 93-98
Author(s):  
Rakesh Goyal ◽  
Buta Singh Sidhu ◽  
Vikas Chawla
Keyword(s):  
Corrosion Resistance ◽  
Protective Coatings ◽  
Composite Coatings ◽  
Thermal Spraying ◽  
Surface Protection ◽  
Spray Coatings ◽  
Wear And Corrosion ◽  
Protection Technology ◽  
Thermal And Electrical Properties ◽  
Wear And Corrosion Resistance

Thermal spraying coating techniques have emerged as very effective surface protection technology to apply protective coatings for corrosion and wear resistance applications. These coatings have gained more importance in recent past. Advances in powder and wire production have resulted in development of various types of surface coatings with excellent wear and corrosion resistance properties. Because of excellent mechanical, thermal and electrical properties of Carbon Nanotubes, CNTs reinforced composite coatings are being developed for various applications, e.g. automotive, aerospace and sports equipment industry. It is observed that if properly deposited, these CNTs ceramic composite coatings can provide improved properties like wear and corrosion resistance. It has been found that CNTs composite coatings can be successfully deposited by thermal spraying techniques, and these coatings provide better performance than conventional coatings. This paper reviews the performance of such coatings developed by various researchers.

scholarly journals Characterization and Corrosion Resistance of Boron-Containing-Austenitic Stainless Steels Produced by Rapid Solidification Techniques

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2189 ◽  
Author(s):  
Guilherme Koga ◽  
Lucas Otani ◽  
Ana Silva ◽  
Virginie Roche ◽  
Ricardo Nogueira ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
High Velocity ◽  
Melt Spinning ◽  
Spray Deposition ◽  
High Velocity Oxygen Fuel ◽  
Copper Mold ◽  
Crystalline Phases ◽  
Copper Mold Casting ◽  
Mold Casting ◽  
Oxygen Fuel

The composition of a commercial duplex stainless steel was modified with boron additions (3.5, 4.5, and 5.5 wt.%) and processed by rapid-quenching techniques: Melt-spinning, copper-mold casting, and high-velocity oxygen fuel (HVOF). Spray deposition was also used to produce alloys as the process may induce rapid-solidified-like microstructures. These processing routes led to microstructures with distinguished corrosion resistance. Among the alloys with different boron contents, the 63.5Fe25Cr7Ni4.5B composition enabled the production of fully amorphous ribbons by melt-spinning. The cooling rate experienced during copper-mold casting, high-velocity oxygen fuel, and spray deposition did not ensure complete amorphization. The crystalline phases thereby formed were (Fe,Cr)2B and (Fe,Mo)3B2 borides in an austenitic-matrix with morphology and refinement dependent of the cooling rates. Fully amorphous 63.5Fe25Cr7Ni4.5B ribbons exhibited outstanding corrosion resistance in chloride-rich alkaline and acid media with negligible corrosion current densities of about 10−8 A/cm² and a broad passivation plateau. Although the specimens of the same composition produced by HVOF process and spray deposition exhibited lower corrosion resistance because of intrinsic porosity and crystalline phases, their corrosion behaviors were superior to those of AISI 1045 steel used as substrate with the advantage to be reinforced with hard borides known to be resistant against wear.

Sign in / Sign up

Export Citation Format

Share Document