Fe-based Alloy Powders Research Articles

Simulation and Experimental Investigation of Fe-based Alloy Powder Production by Gas Atomization

Simulation and Experimental Investigation of Fe-based Alloy Powder Production by Gas Atomization

Effect of Ti/Nb content on microstructure evolution and wear properties of in-situ (Ti,Nb)C reinforced composite coatings by plasma spray welding

Due to their superior wear resistance, multi-particle reinforced composite coatings have caught the interest of numerous researchers. In this research, a method of preparing composite coatings containing in-situ (Ti,Nb)C particles was proposed using plasma spray welding with a mixture of Fe-based alloy, pure Ti, and pure Nb powders. The research involved a detailed analysis of the nucleation mechanism, particle shape and strengthening behavior of (Ti,Nb)C particles in the composite coatings with different atomic ratio of Ti/Nb. The microstructure and phase were examined, and the wear resistance was tested and examined. The phase analysis results manifested that the composite coatings had primarily (Ti,Nb)C reinforcing phase and α-Fe matrix. The (Ti,Nb)C particles were not added in the raw powders, but in-situ generated via the reactions between the powders. The microstructure analysis results indicated that the reinforced particles transformed from irregular dendritic particles into lumpy and spherical particles, and then into an interspersed distribution of laths and spheres as the atomic ratio of Ti/Nb decreased. The microhardness value of these composite coatings when the Ti/Nb ratios were different were 550 HV–650 HV, while the microhardness value of the steel was 174 HV. However, with the increase of Ti/Nb atomic ratio, the change of wear resistance showed the trend: increase → decrease → increase. In-situ (Ti,Nb)C particles were uniformly distributed in the coatings and beneficial to improving the wear resistance. When Ti/Nb ratio is 1:1, the mass loss of the composite coating was only 0.6 mg, which was a quarter of the steel substrate (2.4 mg).

Optimisation and wear performance analysis of laser-cladded WC-Fe-based coating

In this study, a WC-Fe-based coating is prepared on a 45 steel substrate utilising laser cladding technology. To optimise the composition of the Fe-based alloy powder, a thorough analysis of the cracks observed during the formation of the cladding layer is conducted. Elemental control of the WC-Fe-based alloy powder is employed to mitigate issues such as porosity and slagging, consequently reducing the susceptibility to cracking. The optimised WC-Fe-based alloy coating exhibits enhanced wear and abrasion resistance when compared to the widely used Ni45 coating. Microstructural investigations reveal that both coatings feature dendrites, cellular crystals and equiaxial crystals; however, the WC-Fe coating displays a finer and denser microstructure, highlighting its superior characteristics. Hardness and abrasion resistance tests demonstrate the exceptional performance of the WC-Fe-based coatings, having approximately three times the hardness of the substrate and a wear rate approximately seven times lower than that of the substrate. The friction coefficient remains consistently stable for the WC-Fe-based coatings at approximately 0.4, indicative of remarkable friction reduction and abrasion resistance.

Microstructure and Wear Behavior of Ti-xFe-SiC In Situ Composite Ceramic Coatings on TC4 Substrate from Laser Cladding.

Titanium alloys are widely used in various structural materials due to their lightweight properties. However, the low wear resistance causes significant economic losses every year. Therefore, it is necessary to implement wear-resistant protection on the surface of titanium alloys. In this study, four types of in situ composite ceramic coatings with two-layer gradient structures were prepared on a Ti-6Al-4V (TC4) substrate using laser cladding. In order to reduce the dilution rate, a transition layer (Ti-40SiC (vol.%)) was first prepared on TC4 alloy. Then, a high-volume-fraction in situ composite ceramic working layer (Ti-xFe-80SiC (vol.%)) with different contents of Fe-based alloy powder (x = 0, 5, 10 and 15 vol.%) was prepared. The working surface of Ti-40SiC (TL) exhibited a typical XRD pattern of Ti, TiC, Ti5Si3, and Ti3SiC2. In comparison, both Ti-80SiC (WL-F0) and Ti-5Fe-80SiC (WL-F5) exhibited similar phase compositions to the TL coating, with no new phase identified in the coatings. However, the TiFeSi2 and SiC phases were presented in Ti-10Fe-80SiC (WL-F10) and Ti-15Fe-80SiC (WL-F15). It is proven that the addition of the Fe element could regulate the in situ reaction in the original Ti-Si-C ternary system to form the new phases with high hardness and good wear resistance. The hardness of the WL-F15 (1842.9 HV1) is five times higher than that of the matrix (350 HV1). Due to the existence of self-lubricating phases such as Ti5Si3 and Ti3SiC2, a lubricating film was presented in the WL-F0 and WL-F5 coatings, which could block the further damage of the friction pair and enhance the wear resistance. Furthermore, a wear-transition phenomenon was observed in the WL-F10 and WL-F15 coatings, which was similar to the friction behavior of structural ceramics. Under the load of 10 N and 20 N, the wear volume of WL-F15 coating is 5.2% and 63.7% of that in the substrate, and the depth of friction of WL-15 coating is only 14.4% and 80% of that in the substrate. The transition of wear volume and depth can be attributed to the wear mechanism changing from oxidation wear to adhesive wear.

Improving the Surface Integrity and Tribological Behavior of a High-Temperature Friction Surface via the Synergy of Laser Cladding and Ultrasonic Burnishing

Quite a lot of engineering friction components serve at high temperatures, and are thus required to have excellent friction and wear resistance. The said study aims to fabricate high-wear-resistance coating on ordinary low-cost materials, achieving the low-cost manufacturing of some high-end friction components that are usually made with expensive solid alloys. The coating was prepared via laser cladding with a sort of widely used Fe-based self-fluxing alloy powder. The chosen substrate material was forged 42CrMo, which is popular in high-temperature friction engineering applications. In order to achieve the best possible high-temperature friction and wear properties, the prepared coating was turned and then ultrasonic burnished. Three samples, i.e., the substrate sample, the cladded sample without burnishing, and the cladded sample with burnishing, were prepared. For the three samples, the surface characteristics and friction properties at a 200 °C temperature were compared and investigated. According to the results, the cladded sample with burnishing exhibited the best surface finishing and friction behavior. Ultrasonic burnishing after cladding led to a further hardness improvement of 15.24% when compared with the cladded sample without burnishing. Therefore, ultrasonic burnishing is an effective low-cost post-treatment method for a wearable coating serving at a high temperature.

Investigation of the Microstructure and Wear Properties of Conventional Laser Cladding and Ultra-High-Speed Laser Cladding Alloy Coatings for Wheel Materials

In this paper, Fe-based and Co-based alloy powders were chosen to perform laser cladding on wheel materials through conventional laser cladding (CLC) and ultra-high-speed laser cladding (UHSLC) processes, respectively. The microstructures, element distribution, phase composition and hardness of the Fe-based alloy and Co-based alloy coating layers using the CLC and UHSLC processes were compared and analysed. The results show that the CLC and UHSLC alloy coatings were dense and free of defects such as pores and cracks. Compared with the CLC alloy coating, the grain size of the UHSLC alloy coating was smaller, the coating composition was close to the powder design composition, and the distribution of Cr within and between the grains was more uniform. The Fe-based coating was mainly composed of (Fe, Ni) and Cr7C3, and the Co-based coating was mainly composed of γ-Co and Cr23C6. It was found that the cooling rate of the CLC alloy coating was smaller than that of the USHLC, and the hardness of the CLC alloy coating was less than that of the USHLC. The average hardness of the UHSLC Fe-based and Co-based alloy coatings was 709 HV and 525 HV, respectively. The average hardness of the CLC Fe-based and Co-based alloy coatings was 615 HV and 493 HV, respectively. The rolling friction and wear tests were carried out with the CLC-treated and UHSLC-treated wheel specimens on the GPM-30 rolling contact fatigue testing machine. The results showed that the wear rate of the UHSLC alloy coating on the wheel specimens was significantly lower than that of the CLC alloy coating on the wheel specimens. The wear rates of the UHSLC Fe-based and Co-based alloy coatings on the wheel specimens were reduced by 40.7% and 73.8%, respectively. It was demonstrated that the wear resistance of the USHLC alloy coatings was better than those of the CLC alloy coatings. The CLC alloy coating exhibited more severe fatigue damage with small cracks. Furthermore, the damage of the UHSLC alloy coating was relatively minor, with slight spalling. The Co-based alloy coating exhibited superior wear properties with the same laser cladding process.

Temperature field simulation and microstructure evolution of Fe-based coating processed by extreme high-speed laser cladding for re-manufacturing locomotive axle

With the rapid development of Chinese railway network in the last decade, the number of scrapped locomotive axles is increasing year by year due to various damages. Re-manufacturing is an effective way to save resources and reduce carbon footprint for developing an environmental-friendly society. In the present work, Fe-based alloy powder was deposited on the surface of a 25CrMo4 steel using extreme high-speed laser cladding (EHLA). The optimum processing parameters were determined through range analysis, and the thermal effect to the substrate was studied by numerical simulation. The depth of heated-affected zone (HAZ) was obtained by both experimental method and numerical simulation approach, and the results showed good agreement. The microstructure evolution, phase composition, and mechanical properties of the cladding layer were investigated systematically. The cladding layer was mainly consisted of austenite, ferrite, and carbides. The microstructure evolution exhibited a gradient variation from the interface to the top of cladding layer, which was similar to conventional laser cladding (CLA). Furthermore, the quenching effect to the substrate changed the microstructure from sorbite to martensite, leading to the formation of hardening layer beneath the cladding layer. The cladded sample exhibited higher tensile strength but lower elongation compared with 25CrMo4 substrate, which was detrimental to the service life of locomotive axles.

Degradation of methyl orange by an ultrasonic Fenton-like process with Fe-based amorphous alloy powders

In this study, the degradation performance of Fe–Nb–Cu–Si–B amorphous alloy powders towards methyl orange in an ultrasonic Fenton-like process is reported. EPR experiments proved that ˙OH and ˙O2− were the main reactive radicals.

Parameter Study and Economic Efficiency Optimization for Laser Cladding with Wide-Band Fiber Laser

With the aim of investigating the cladding geometry characteristics by a wide-band fiber laser with coaxial rectangular nozzle, and optimizing the powder efficiency and deposition speed for economy efficiency, Fe-based alloy powder was deposited on AISI 1045 substrate by a 3000 W fiber laser in this study. Laser power (P), scan speed (V), and powder feed rate (F) were selected for a factorial design. The effects of the three process parameters on the geometry characteristics and economic efficiency of single tracks were statistically analyzed, and a linear regression model was established between the combined parameters and the relevant characteristics (including track height, ratio of track width to height, powder efficiency, and deposition speed). A process map was developed with the track shape and key economic indexes as boundaries. A flat-top feature of the track profile was found and can be utilized to achieve good cladding evenness. The process map showed that the powder efficiency and deposition speed were higher than 50% and 20 mm3/s, respectively, when selecting process parameters in the as-built operation window.

Pressure-dependent microstructure evolution of Fe-based amorphous alloy powders via high-pressure gas atomization

The pressure-dependent microstructure evolution of the gas-atomized Fe-based amorphous alloy powders at gas pressures in the range from 5 MPa to 8 MPa has been studied experimentally and theoretically. The results showed that the amorphous fraction and nucleation mode of particles were sensitive to the gas pressure. Specifically, at 7 MPa, the particles presented a fully amorphous structure with the maximal size class of 45–75 µm, and preferred to nucleate heterogeneously within the sphere rather than on the surface. These interesting phenomena were associated with the difference of cooling rate within droplets, reflected by the gas-liquid relative velocity at the cooling and solidification stage in the atomization process. It was also indicated that the amorphous phase underwent three stages of reactions upon devitrification with the precipitations of {Fe, Ni} and Fe 2 P, α-Fe and M 23 B 6 , respectively. Finally, glass-forming features of powders at different pressures have been elucidated based upon a kinetics analysis of the cooling rates of droplets and the phase selection competition. This work provides beneficial guidance for the devisal of metallic glass powder with different microstructures via gas atomization. • The amorphous fraction and nucleation mode of particles were sensitive to the gas pressure. • The cooling histories of droplets with typical diameters were simulated in the atomization process. • At 7 MPa, the largest gas-liquid relative velocity resulted in the largest cooling rate for droplets. • The microstructure evolution and transition depend on the calculation of R c and cooling histories of droplets.

Effects of interfacial interactions between metal and process control agents during ball milling on the microstructure of the milled Fe-based nanocrystalline alloy powder

Fe–Si–B–P–Cu nanocrystalline alloy were treated with ball-mill using a lubricant as a process control agent (PCA). The resulting alloy powder is a strong candidate material for soft magnetic composites. Two ball milling methods (continuous and interval) were employed to control the interactions between the PCA and the alloy surface, and their effect on the microstructure of the prepared alloy particles was investigated. The alloy sheet was broken into small pieces and deformed plastically into flake-shaped particles regardless of the ball milling method implemented. Friction-force microscopy of the alloy immersed in the PCA revealed that the friction coefficient of the alloy surface exposed to air for a certain period was higher than that of the unexposed alloy surface (immediately after polishing). During ball milling, the ratio of the newly generated surface to the oxidized surfaces of the alloy subjected to interval milling was smaller than that of the alloy subjected to continuous milling. Therefore, the friction coefficient of the surface of the alloy subjected to interval milling was higher than that of the alloy subjected to continuous milling. Synchrotron radiation analysis revealed that the alloy subjected to interval milling exhibited enhanced surface friction, showing an obvious steepness and inflection in the diffraction intensity as a function of the tilt angle based on the Schulz reflection method. This indicates formation of crystallographic texture in α-Fe grains in an amorphous matrix. Hence, we demonstrated successfully that the ball milling process induced a crystallographic texture in the Fe-based nanocrystalline alloy due to plastic deformation due to the enhanced surface friction. The surface of the alloy was prepared based on the effect of the interfacial interactions between the alloy surface and the PCA.

Impact of gas pressure on particle feature in Fe-based amorphous alloy powders via gas atomization: Simulation and experiment

• The flow dynamics of the gas phase and gas-melt two-phase fields, and the break-up process were illustrated. • The particle size distributions of simulated results were consistent with the powder experimental tests. • The Fe-based alloy powders with diameters in the range of 25–45 μm were found to be a fully amorphous phase. Gas atomization is now an important production technique for Fe-based amorphous alloy powders used in additive manufacturing, particularly selective laser melting, fabricating large-sized Fe-based bulk metallic glasses. Using the realizable k-ε model and discrete phase model theory, the flow dynamics of the gas phase and gas-melt two-phase flow fields in the close-wake condition were investigated to establish the correlation between high gas pressure and powder particle characteristics. The locations of the recirculation zones and the shapes of Mach disks were analyzed in detail for the type of discrete-jet closed-coupled gas atomization nozzle. In the gas-phase flow field, the vortexes, closed to the Mach disk, are found to be a new deceleration method. In the two-phase flow field, the shape of Mach disk changes from “ S ”-shape to “ Z ”-shape under the impact of the droplet flow. As predicted by the wave model, with the elevation of gas pressure, the size of the particle is found to gradually decrease and its distribution becomes more concentrated. Simulation results were compliant with the Fe-based amorphous alloy powder preparation tests. This study deepens the understanding of the gas pressure impacting particle features via gas atomization, and contributes to technological applications.

Effects of Interfacial Interaction between Metal and Process Control Agents During Ball Milling on the Microstructure of the Milled Fe-Based Nanocrystalline Alloy Powder

Effects of Interfacial Interaction between Metal and Process Control Agents During Ball Milling on the Microstructure of the Milled Fe-Based Nanocrystalline Alloy Powder

Study on the Soft Magnetic Properties of FeSiB/EP Composites by Direct Ink Writing

Fe-based amorphous alloy has excellent soft magnetic properties; traditionally, Fe-based amorphous alloy such as soft magnetic devices was fabricated by insulation enveloping and suppression molding methods. In this process, the aging of organic envelope materials and the crystallization of Fe-based amorphous alloy were usually occurring, accompanying with low magnetic induction and poor mechanical properties. The direct ink writing (DIW) technique can make complex-shaped parts and needs no heating treatment after forming, which can avoid the effect of traditional molding process. In the present study, varying mass fraction FeSiB/EP composite parts were prepared by the DIW technique with the Fe-based amorphous alloy powder and epoxy resin, in which microscopic morphology, magnetic properties, and mechanical properties of FeSiB/EP soft magnetic composites were studied. The results indicate that the slurry with iron powder mass fraction of 92.3, 92.6, and 92.8 wt% has good printing performance and self-support ability, which is suitable for DIW. The density of the printed parts is about 4.317, 4.449, and 4.537 g/cm3, which is almost similar with the iron powder. The tensile strength and elongation of printing parts are significantly improved compared with the pure epoxy resin. From the photos of microscopic morphology of printing parts, it can be seen that FeSiB powders are evenly dispersed in EP, no pores, and defects, with the proportion increasing of powders; the insulation coating thickness decreases; and the magnetic performance improves. The optimal sample is 92.8 wt% FeSiB/EP, in which saturation magnetic induction strength is 137.9759 emu/g and coercivity is 4.6523 A/m.

Effect of laser claddings of Fe-based alloy powder with different concentrations of WS2 on the mechanical and tribological properties of railway wheel

Laser cladding could be applied on railway wheels to improve their service lives. Fe-based alloy powder is widely used as the laser cladding material due to its good self-fluxing ability and low price. However, the friction coefficients and wear rates of Fe-based alloy laser claddings are high. WS2 is used as the additive for common laser cladding treatment, while it has not been used for claddings on railway wheels. Understanding the influence of WS2 concentration on the mechanical and tribological properties of Fe-based alloy laser claddings on railway wheels has significance for extending the application of laser treatment on railway transit. Therefore, laser claddings of Fe-based alloy powders with different contents of WS2 powder (0, 2%, 4%, 6%, 8%) were produced on the railway CL60 wheel material. Rolling-sliding tests were conducted on a twin-disc tribometer using the uncladded and cladded wheel samples against an uncladded U71Mn rail sample. The results indicated that the microstructure of laser claddings was composed of dendritic and eutectic phases. With the increase in the WS2 content from 0 to 6%, the size of dendritic phases was decreased from around 20 μm to less than 10 μm. With 8% WS2, the size of dendritic phases was increased to around 10–20 μm. Laser claddings of Fe-based alloy powders with WS2 included (Fe, Ni) and (Fe, Si) solid solutions, hard carbide (Cr7C3), Ni–Cr–Fe, and CrS phases. The hardness was increased to 730–820 HV0.5 and residual stresses were changed to be compressive state. Rolling contact fatigue (RCF) cracks preferentially initiated and developed along the boundary between dendritic and eutectic phases. The smallest wear rate and shortest RCF cracks occurred on the cladding from powders with 6% WS2. Thus, the optimum content of WS2 in the Fe-based alloy powder was 6% for laser cladding on the railway wheel material.

Preparation of flake-shaped Fe-based nanocrystalline soft magnetic alloy particles subjected to plastic deformation

ABSTRACT Fe-based nanocrystalline alloy powder prepared by ball-milling is a potential candidate as a soft magnetic composite (SMC). Since the magnetic properties of particles having a random geometry arising from brittle fracture deteriorate by the presence of a demagnetising field, plastically deformed flake-shaped powders, exhibiting better magnetic properties on account of the suppression of any demagnetising field, are desirable. Microstructure such as grain size, lattice distortion and the distribution of dislocations, are affected by ball-milling treatment which changes the magnetic properties. In this study, Fe-based nanocrystalline alloy sheets are ball-milled with lubricant oil as a process control agent (PCA) and the microstructure of the particles investigated. The PCA effectively suppresses the brittle fracture of the alloy sheet during the ball-milling treatment and plastically deformed flake-shaped particles are then successfully obtained. Transmission electron microscopy reveals that there were few lattice defects in the α-Fe grain of the alloy, which indicated that almost only grain-boundary-mediated processes such as GB diffusion/sliding/migration and grain rotation dominate the deformation mechanism. However, Williamson–Hall analysis based on synchrotron radiation exhibits a slope indicating micro-strain in the α-Fe grains. It is found that the plastic deformation induced by the ball-milling treatment forms a microstructure having lattice distortion but containing few lattice defects. It is considered that a slight growth of the existing grains, which can be induced by thermal treatment, can achieve a strain- and dislocation-free microstructure, which is desirable for soft magnetic alloys.

The synergy of chromium and molybdenum on the stable catalysis of Fe-based amorphous alloy powder

The Fe41Co7Cr15Mo14C15B6Y2 amorphous alloy powder was prepared by gas atomization. It was interesting that rhodamine B can be completely degraded within only 6 min by 1 g/L Fe41Co7Cr15Mo14C15B6Y2 and 3 mM H2O2 at pH 5.0 at 313 K. This result can be repeated at least 30 times. It is worth mentioning that the catalyst surface spontaneously formed a double passivation film during the degradation process. The passivation film composed of Cr2O3 and Cr(OH)3 is located in the outer layer, while the passivation film composed of MoO2 and MoO3 is located in the inner layer. This double passivation film regulates the contact of ions on the catalyst surface with the solution, which makes the catalyst have a stable catalytic efficiency in the reaction. The findings have important implications in developing Fe-based amorphous alloys for functional application materials in the field of wastewater treatment.

Study on laser cladding process parameters of Fe-based alloy based on numerical simulation

Using 45 steel as the substrate, laser cladding Fe-based alloy powder on the surface was proposed to improve the surface wear resistance and hardness, and partially replace the cold working die steel in the small batch production stage. ANSYS Workbench was used to simulate the heat transfer and temperature field distribution in the laser cladding process of iron base alloy. The thermal properties of the substrate and the cladding material were set up, and the finite element model was established by Gaussian heat source. The temperature field under different laser cladding process parameters was simulated to obtain the temperature distribution of molten pool. According to the metallurgical bonding between the substrate and the coating, and taking the dilution rate of the cladding layer as the basis of quality evaluation, the optimal process parameter combination of laser cladding Fe-based alloy powder of 45 steel substrate is determined as follows: laser power 1400W, scanning speed 8mm/s, spot diameter 3mm. The results provide technical data support for the engineering application of laser cladding of Fe-base alloy on 45 steel substrate.

In-situ TiB2-TiC reinforced Fe-Al composite coating on 6061 aluminum alloy by laser surface modification

To improve the wear resistance of 6061 aluminum alloy, we have reported the fabrication of in-situ TiB2-TiC reinforced Fe-Al composite coatings by laser alloying with Fe-based self-fluxing alloy, B4C and Ti mixed powder. Two Ti contents, which are 30 wt. % and 45 wt. %, in the alloyed coatings were investigated as comparisons, so that investigate phase compositions, microstructures and wear resistance of the alloyed coatings. Additionally, the disregistry between (0001)TiB2 and (111)TiC planes were calculated, of which the formation mechanism of TiB2/TiC composite structure was further analyzed. It was found that the alloyed coatings mainly consisted of TiB2, TiC, Fe4Al13, Cr2B, Cr7C3, Al3Ti and α-Al. With the addition of 30 wt. % Ti, we found that TiC nucleated heterogeneously on the surface of short rod-like TiB2, forming TiB2/TiC composites. The interface was well bonded with a low disregistry of 1.049 %. The average micro-hardness of the composite coating was larger than 7 times of the substrate with a high value of 520 HV0.2. Moreover, a 92.8 % reduction in the volume loss enunciated a significant enhancement in wear resistance. Nevertheless, with the increase of Ti component in the alloyed coating, the supportability of the metal matrix to the reinforcements decreased, resulting in a slight reduction of the micro-hardness and wear resistance.

The study of mechanical properties and corrosion behavior of the Fe-based amorphous alloy coatings using high velocity oxygen fuel spraying

• Prepared Fe-based amorphous alloy with high hardness and corrosion resistance by high velocity oxygen fuel spraying. • Used cold and hot alternating salt spray corrosion test and high-speed water erosion to simulate ocean atmosphere climate. • The corrosion behaviors of Mo and Cr elements between Fe-based substrates and Fe-based amorphous alloys coatings. The Fe-based amorphous alloy powders Fe 40 -Cr 19 -Mo 18 -C 15 -B 8 are sprayed on 316 stainless steel substrates by high velocity oxygen fuel spraying (HVOF) process. The microstructure of coatings are analyzed by XRD, SEM, XPS and TEM. The corrosion behavior of coatings under different corrosive solutions is also studied. The experimental results presented that the average hardness of coating is approximately at 1024 Hv, contact angle is from 72° to 74°. The scratch test result shows that the LC 2 value of coatings occurred at 46.0 N. SEM images presented that there are micro-holes and micro-cracks in coatings. XRD pattern and TEM images indicated the microstructure of coatings are the amorphous structure and amorphous/crystalline mixed structure. The potentiodynamic polarization analysis results show the corrosion resistance of coatings under sea water and 3.5 wt% NaCl solution has a transition behaviors of activation, passivation and over passivation. Through the cold and heat alternating salt spray corrosion test and the high-speed water erosion test, the surface of coatings rusted after 12 weeks. The surface of coatings formed passivation film during corrosion test, and it has a very slight weight loss. It can be seen that the Fe-based amorphous alloy has a good stable passivation and a corrosion-resistant.