The Effect of Heat Treatment on the Corrosion Resistance of Fe-Based Amorphous Alloy Coating Prepared by High Velocity Oxygen Fuel Method

In this study, Fe40Cr19Mo18C15B8 amorphous coatings were prepared using high velocity oxygen fuel (HVOF) technology. Different temperatures were used in the heat treatment (600 °C, 650 °C, and 700 °C) and the annealed coatings were analyzed by DSC, SEM, TEM, and XRD. XRD and DSC results showed that the coating started to form a crystalline structure after annealing at 650 °C. From the SEM observation, it can be found that when the annealing temperature of the Fe-based amorphous alloy coating reached 700 °C, the surface morphology of the coating became relatively flat. TEM observation showed that when the annealing temperature of the Fe-based amorphous alloy coating was 700 °C, crystal grains in the coating recrystallized with a grain size of 5–20 nm. SAED analysis showed that the precipitated carbide phase was M23C6 phase with different crystal orientations (M = Fe, Cr, Mo). Finally, the corrosion polarization curve showed that the corrosion current density of the coating after annealing only increased by 9.13 μA/cm2, which indicated that the coating after annealing treatment still had excellent corrosion resistance. It also proved that the Fe-based amorphous alloy coating can be used in high-temperature environments. XPS analysis showed that after annealing FeO and Fe2O3 oxide components increased, and the formation of a large number of crystals in the coating resulted in a decrease in corrosion resistance.

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Influence of Heat Treatment on Corrosion Resistance of High-Velocity Oxygen-Fuel Sprayed WC-17Co Coatings on 42CrMo Steel

Journal of Materials Engineering and Performance ◽

10.1007/s11665-015-1636-5 ◽

2015 ◽

Vol 24 (9) ◽

pp. 3218-3227 ◽

Cited By ~ 1

Author(s):

Wan-chang Sun ◽

Pei Zhang ◽

Feng Zhang ◽

Chu-xu Dong ◽

Ju-mei Zhang ◽

...

Keyword(s):

Heat Treatment ◽

Corrosion Resistance ◽

High Velocity ◽

High Velocity Oxygen Fuel ◽

42Crmo Steel ◽

Oxygen Fuel

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A Study on Corrosion and Corrosion-Wear Behavior of Fe-based Amorphous Alloy Coating Prepared by High Velocity Oxygen Fuel Method

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2021.10.103 ◽

2021 ◽

Author(s):

Chun-Ying Lee ◽

Tzu-Jing Lin ◽

Hung-Hua Sheu ◽

Hung-Bin Lee

Keyword(s):

Amorphous Alloy ◽

High Velocity ◽

Wear Behavior ◽

Alloy Coating ◽

High Velocity Oxygen Fuel ◽

Corrosion Wear ◽

Oxygen Fuel

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COLMONOY NO. 43HV

Alloy Digest ◽

10.31399/asm.ad.ni0664 ◽

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.

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Arc Thermal Spray NiCr20 Alloy Coating: Fabrication, Sealant, Heat Treatment, Wear, and Corrosion Resistances

International Journal of Electrochemistry ◽

10.1155/2019/8796958 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Van Tuan Nguyen ◽

Quy Le Thu ◽

Tuan Anh Nguyen ◽

Quoc Cuong Ly ◽

Ly Pham Thi ◽

...

Keyword(s):

Heat Treatment ◽

Wear Resistance ◽

Corrosion Resistance ◽

Phase Composition ◽

Corrosion Test ◽

Annealing Temperature ◽

Alloy Coating ◽

Aluminum Phosphate ◽

Annealing Temperatures ◽

Wear And Corrosion

This study presents the effect of heat treatment on porosity, phase composition, microhardness, and wear and corrosion resistances of the thermal sprayed NiCr20 coating after sealing with aluminum phosphate. The annealing temperatures were varied in a range of 400 to 1000°C. The obtained results indicated the porosity of coating decreased with increasing the annealing temperature. After treatment at temperatures in range of 800-1000°C, more than 90% of initial pores in the coating were successfully filled with the sealants. The XRD data revealed not only the formation of new phases of other compounds, but also the interaction between coating and sealant. After heat treatment, wear resistance of coating was 12 times higher than that without heat treatment. The corrosion test in H2SO4 solution indicated that the presence of sealant in coatings increased their corrosion resistance. From these findings, application of these NiCr20 coatings to protect steel against wear and corrosion appears very promising.

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Effect of Corrosive Medium on the Corrosion Resistance of FeCrMoCB Amorphous Alloy Coating

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.291-294.65 ◽

2011 ◽

Vol 291-294 ◽

pp. 65-71 ◽

Cited By ~ 1

Author(s):

Qing Jun Chen ◽

Lin Li Hu ◽

Xian Liang Zhou ◽

Xiao Zhen Hua ◽

Ying Jun Yang

Keyword(s):

Corrosion Resistance ◽

Amorphous Alloy ◽

Amorphous Alloys ◽

Room Temperature ◽

Electrochemical Impedance ◽

Equivalent Circuit Model ◽

Alloy Coating ◽

Potentiodynamic Polarization Curves ◽

Naoh Solution ◽

Oxygen Fuel

The purpose of this study is to investigate the electrochemical properties of Fe44Cr16Mo16C18B6amorphous alloy coating fabricated using high velocity oxygen fuel (HVOF) technology in 2.0M HCl and NaOH solution at room temperature(25°C). Based on the potentiodynamic polarization curves and Electrochemical Impedance Spectroscopy(EIS) testing results of coating in aqueous solutions of HCl and NaOH, the corrosion resistance of Fe44Cr16Mo16C18B6amorphous alloy coating in HCl solution was superior to that in NaOH solution. The icorrwas 1.487×10-5A·cm-2in HClsolution and 1.107×10-4A·cm-2in NaOH solution, while the Rtreach to 5.789×104Ω·cm2and 9780Ω·cm2, respectively. On the other hand, these corrosion phenomenon could be better interpreted by R(Q(R(RQW)))(RL) and R(RL)(Q(R(CW))) equivalent circuit model, which were different from that of other Fe-based amorphous alloys in HCl and NaOH solution, respectively.

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Optimizing the Substrate Preheating Process of High Velocity Oxygen Fuel Cobalt-Based Alloy Coating on Alloyed and Carbon Steels Mechanical Properties

Materials Science Forum ◽

10.4028/www.scientific.net/msf.929.142 ◽

2018 ◽

Vol 929 ◽

pp. 142-149 ◽

Cited By ~ 1

Author(s):

Myrna Ariati Mochtar ◽

Wahyuaji Narottama Putra ◽

Raditya Perdana Rachmansyah

Keyword(s):

Wear Resistance ◽

High Velocity ◽

Alloy Coating ◽

Carbon Steels ◽

Surface Heating ◽

Initial Surface ◽

High Velocity Oxygen Fuel ◽

Alternative Material ◽

Substrate Preheating ◽

Oxygen Fuel

Tube boiler operating condition initiates common problems that can occur as a problem in the wear resistance material. It leads to a decreased function of the material so that it is necessary to repair or replacement. High Velocity Oxygen Fuel (HVOF) is regarded as one of the effective methods to increase the wear resistance of the material. In this study, the materials were ASTM SA213-T91 as a material commonly used for boiler tube and JIS G 3132 SPHT-2 as an alternative material. In the early stages, both of specimens were given initial surface heating with temperature variations 0, 50, 100 and 150oC. The materials were then coated with Stellite-1 using HVOF method. The material were then characterized for the microstructure, porosity, hardness distribution, and wear resistant. The results showed that the coating Stellite-1 as a top coat with HVOF method can improve the performance of the material. Microhardness increases from 220 HV to 770 HV on ASTM SA213-T91, while on the substrate JIS G 3132 SPHT-2 the microhardness increased from 120 HV to 750 HV. Better wear resistance was achieved with increasing preheating [1]. Wear resistance of the materials increased from the range 3.69x10-7at 0°C preheating up to 0.89x10-7on a specimen with initial surface heating 150oC. Porosity also decreases with the increasing preheating temperature.

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

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2014.03.041 ◽

2014 ◽

Vol 249 ◽

pp. 24-41 ◽

Cited By ~ 49

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

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Numerical Analysis of High-Velocity Oxygen Fuel Thermal-Spray Process for Fe-Based Amorphous Coatings

Coatings ◽

10.3390/coatings11121533 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1533

Author(s):

Jianxing Yu ◽

Xin Liu ◽

Yang Yu ◽

Haoda Li ◽

Pengfei Liu ◽

...

Keyword(s):

Amorphous Alloy ◽

High Velocity ◽

Injection Rate ◽

Amorphous Coating ◽

High Velocity Oxygen Fuel ◽

Alloy Particle ◽

Coating Structure ◽

Particle Behavior ◽

Spray Process ◽

Oxygen Fuel

High-velocity oxygen fuel (HVOF)-sprayed amorphous alloy coatings usually have advantages of a dense structure that improve their resistance to corrosion, wear, and fatigue in the substrate. The flame flow characteristics and particle behaviors during the spray process have a significant influence on the amorphous coating structure and properties. In this study, a computational fluid dynamics model is enforced to analyze the flame flow and Fe-based amorphous alloy particle behavior in an HVOF spray process. The flame flow temperature, velocity characteristics, and the Fe48Cr15Mo14C15B6Y2 Fe-based amorphous alloy particles’ velocities, temperatures, flight trajectories, and mass concentration distribution characteristics are simulated. Moreover, the effects of the oxygen/fuel ratio, particle morphology parameter, particle-injection rate, and angle on the particle behavior are also investigated. Judging from the simulation results, the optimum amorphous alloy particle size varies between 20 and 30 μm, the shape factor is within the range of 0.9–1, the optimum O/F ratio is 3.4, the optimum injection angle is 45°, and the optimum injection rate is 10 m/s. With these conditions, most of the particles settled toward the centerline of the spray gun and are in a semisolid or solid state before affecting the substrate, giving the materials optimal coating structure and performance.

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