Alloy Interface Research Articles

Understanding imidazole derivatives effect as a corrosion inhibitor for brass in nitric acid: a combined experimental and theoretical assessments

ABSTRACT This paper presents a new study on imidazole derivatives namely 1H-imidazole (IM), N-methylimidazole (MIM) and 1H-benzimidazole (BIM) as a corrosion inhibitor for brass in nitric acid medium. Electrochemical results demonstrate that the inhibition increases with a high concentration of imidazole derivatives; the inhibitory efficiency reaches a maximum of 94% at 10–2 mol L−1 for BIM. SEM morphology and EDS analysis show that these derivatives are adsorbed onto the brass interface, the brass sample is effectively protected and the surface becomes relatively flat, which is more significant in the presence of 1H-benzimidazole. FTIR results confirm the retention of BIM on the interface of Cu-Zn alloys. In addition, quantum chemistry calculation manifests that the three derivatives can reveal high anticorrosion properties. Molecular dynamics simulation data manifest that the three imidazole derivatives can be adsorbed at the brass surface in a paralleled way, and have large binding energy. Highlights A new action of imidazole derivatives to mitigate brass corrosion was explored in HNO3. BIM showed inhibitory efficiency more than 94% in HNO3 solution. The inhibition mechanism is studied using SEM/EDS surface analysis and FTIR analysis. The calculated adsorption energies are ranked in the following order: BIM > MIM > IM. Theoretical and experimental results lead to used imidazole derivatives as potential corrosion inhibition for brass in solution.

Phase-separated CuAg alloy interfacial stress induced Cu defects for efficient N2 activation and electrocatalytic reduction

The electrochemical nitrogen reduction reaction (eN2RR) to produce ammonia represents a promising approach to substitute the traditional Haber-Bosch process. However, it remains challenging due to the low ammonia yield caused by low Faradic Efficiency over the target intermediates. Herein, the adjacent Cu defect formed at the interface of phase-separated CuAg alloy was successfully prepared by using the cation-exchange method and identified as the most active electrocatalytic center for efficient N2 reduction. The phase-separated CuAg alloy with rich interfacial Cu defective sites exhibited excellent eN2RR performance with an ammonia production rate (38.35 µg h−1 cm−2) and a Faradaic efficiency of 12.72 % at − 0.60 V versus reversible hydrogen electrode. Our work unravels fundamental principles for the rational design of electrocatalysts, and provides a strategy for fabricating the CuAg-PS alloy with rich interfacial Cu defective sites for eN2RR.

Discussion on the presence condition of suboxide ZrO beneath the oxide in zirconium alloys

Characteristics related to the oxide-metal interface of oxidized (corroded) zirconium alloys in an autoclave have been extensively explored using both experimental and theoretical methods during the last ten years. A thin intermediate or suboxide layer with an approximate 1:1 ZrO stoichiometry was observed at the oxide-metal interface in several zirconium alloys. Through investigating its chemical composition, morphology, grain size and orientation relationship with the substrate α-Zr, some researchers assumed that the suboxide layer is related to the oxidation (corrosion) rate, whereas others did not. The majority of earlier studies used aqueous corrosion samples that were exposed to high pressure and low temperature, simulating in-service conditions. However, the interfacial characteristics at higher temperature have been scarcely reported. In this study, we focused on the microstructure and micro-chemistry of the oxide and suboxide ZrO in Zircaloy-4 and Zr-1.0Nb-0.01Cu oxidized at 650–1000 °C by combining Backscattered Electron (BSE) mode in Scanning Electron Microscope (SEM), Transmission Electron Backscatter Diffraction (t-EBSD) and (Scanning) Transmission Electron Microscope fitted with an Energy Dispersive X-ray Spectroscope ((S)TEM-EDS). The results show that the suboxide ZrO in oxidized Zircaloy-4 and Zr-1.0Nb-0.01Cu alloys has different morphologies. With increasing oxidation temperature, the suboxide ZrO distribution varies significantly, from a continuous layer to a few occasional blocky grains, until any ZrO grains are undetectable at the ZrO2/α-Zr(O) interface. The hexagonal crystallographic structure of ZrO has also been confirmed. According to discussions combining our investigations and earlier reports, the presence of suboxide ZrO and their morphology are probably related to the oxidation temperature, chemical composition of alloys and complex stress accumulation adjacent to the interfacial region.

Intrinsic blocking effect of FeSi alloy in LiPF6 electrolyte solutions

FeSi anode materials have attracted extensive attention because of their slow volume expansion. However, the side reactions between electrolytes and FeSi anodes have been neglected and rarely studied. In this work, the side reactions and corrosion kinetics of a FeSi alloy and LiPF6 electrolyte were elucidated using corrosion behavior analysis, electrochemical properties, and surface morphology, while the reaction mechanism was analyzed via X-ray photoelectron spectroscopy (XPS). The results show that the reaction rate of the FeSi alloy in the electrolyte decreases with an increase in silicon content and exposure time. The electrolyte transforms Fe (0) on the FeSi alloy interface into Fe (2+), which is further oxidized to Fe (3+). Finally, a fluoride film is deposited and accumulated on the alloy surface, which can prevent the LiPF6 electrolyte corroding the FeSi alloy matrix and prevent the occurrence of side reactions. Electrochemical tests show that the presence of a FeSi2 phase in the FeSi alloy can promote electron transmission, reduce impedance, and achieve a large reversible capacity (927.6 mAh·g−1) after 100 cycles. For lithium ion batteries, the FeSi alloy exhibits better cycle stability and a wider application market than those of the Si anode materials.

Effect of amorphous phase on the migration mechanism of basal/prismatic interface in Mg alloys

A dual-phase nanostructured amorphous/crystalline model is an effective method to improve the mechanical properties of Mg alloys. However, the fundamental strengthening mechanism related to the interaction between basal/prismatic (BP) and amorphous phase in the dual-phase Mg alloys is still unclear. Here, the effects of the size and spacing of amorphous nanopillars on the mechanical properties and the BP interface migration behavior of the bicrystalline Mg alloys are investigated by the molecular dynamics simulation method. The results show that due to the attraction of amorphous nanopillar to interfacial dislocations, the introduction of amorphous nanopillar reduces the yield stress of the bicrystalline Mg alloys, and the yield stress decreases with the increase of the amorphous nanopillar radius. The results indicate that the amorphous nanopillar has an obvious blocking effect on the migration of the BP interface, and the larger the radius of amorphous nanopillars (or the smaller the spacing of amorphous nanopillars), the more obvious the strengthening effect. In addition, the migration mechanism of the BP interface in the bicrystalline Mg alloys is analyzed in detail.

In Situ Construction of Sodiophilic Alloy Interface Enabled Homogenous Na Nucleation and Deposition for Sodium Metal Anode

The sodium (Na) metal anode is a desirable anode for the next-generation batteries because of its abundant resources and the high specific capacity. However, the poor cyclic stability hinders its practical application. In this study, we report a facile strategy of in situ constructing sodiophilic alloying sites for Na metal anodes by using zinc (Zn) foil as the current collector, which enables smooth and compact deposition morphology and excellent cyclic stability. The Zn current collector and the initial deposited Na generate a NaZn13 alloy interface, which can guide the subsequent plating/stripping behavior of Na. As a result, the Na metal anode with Zn current collector exhibits ultrahigh stability with Coulombic efficiency of 99.87% (over 450 cycles at 1 mA cm−2 for 1 mAh cm−2). Furthermore, the impressive capacity retention (98.5% after 40 cycles at 0.5 C) in Zn∣∣NVP (Na3V2(PO4)3) batteries suggests the anticipated application prospect of Zn current collector in anode-free Na metal batteries, which opens up a new way for the evolution of the next generation of safe and efficient Na metal anodes.

Insights into in-situ TiB/dual-phase Ti alloy interface and its high load-bearing capacity

To better understand the strengthening mechanism of in-situ formed TiB reinforcements in dual-phase Ti6Al4V alloy, the interface characters and properties of α-Ti/β-Ti/TiB system were thoroughly investigated with the combined use of high-resolution transmission electron microscopy (HRTEM), ab-initio calculations, and indentation tests. The ab-initio calculations suggest that the highly coherent (100)TiB/(1¯21)β-Ti phase boundary (PB) has fairly low interface energy of 0.082 J/m2 with an exceptionally high adhesion strength of 6.04 J/m2, owing to the formation of strong interfacial Ti–B ionic bonds. The semi-coherent (201¯)TiB/(0001)α-Ti interface shows a relatively higher interface energy of 1.442 J/m2 but still with a fairly high adhesion strength of 4.95 J/m2. With the obtained interfacial energetics, thermodynamics analyses were further carried out to explore the nucleation mechanism of α-Ti in TiB reinforced Ti6Al4V composite. Superior to the heterogeneous nucleation at TiB/β-Ti interface, the homogeneous nucleation of α-Ti within the β-Ti phase can be more energy-preferred, due to its lower nucleation energy barrier and critical radius. Further indentation tests under various loads of different modes confirmed a remarkably enhanced load-bearing capacity of dual-phase Ti6Al4V alloys, under the critical significance of the strong interfacial bonding achieved by reinforcements of in-situ formed TiB.

Characterization of the Interfacial Structures of Core/Shell CdSe/ZnS QDs.

Core/shell quantum dots (QDs) have been extensively studied, yet their optical properties widely vary among studies. Such variation may arise from the variation in interfacial structures induced by the subtle difference in each synthetic procedure. Here, we studied the interfacial structures of CdSe/ZnS QDs using the time-of-flight medium energy ion-scattering spectroscopy (TOF-MEIS), which offers the radial elemental distributions as well as the overall elemental compositions of QDs. The TOF-MEIS spectra provided strong evidence for the existence of an alloyed layer at the interface between CdSe and ZnS in typical CdSe/ZnS QDs. On the basis of the emission and absorption spectra of QDs sampled during the synthesis, we conclude that such interfacial alloying is caused by the dissolution of CdSe seeds during the synthesis steps. Such a dissolution mechanism is further corroborated by the observation that the ligand environment of solvent (X or L type) leads to different shapes of interfaces.

Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayer

This study focused on the effect of a high-entropy alloy (HEA) interlayer on the improvement of microstructure and mechanical properties of steel/Al alloy lap joints by laser welding. The FeCoCrNiCu HEA improved metallurgical reaction by restricting the formation of Fe–Al intermetallic compounds (IMCs) at the interface. Results showed that in the steel on Al alloy lap joint without an interlayer, the discontinuous multi-phase IMCs layer mainly consisted of three types of IMCs, Fe-rich β-FeAl phases, and Al-rich θ-Fe4Al13 + η-Fe2Al5 phases. With the addition of a HEA interlayer, owing to the sluggish diffusion effect in the fusion zone (FZ), the diffusion of Fe atoms from FZ to the IMCs layer was significantly controlled, which limited the generation of IMCs at the FZ/Al alloy interface. The IMCs layer was only composed of single-phase β-FeAl with the absence of highly brittle Al-rich IMCs and the thickness of IMCs layer was reduced from 85 μm to 30 μm, resulting in the enhancement of toughness of the joint. Additionally, the improvement of mechanical properties of the joint, including microhardness and tensile shear strength was consistence with the reduction of brittleness of IMCs at the interface.

Phase equilibria in Hg-Al system during vacuum distillation

In this work, gas-liquid equilibrium states are calculated, including phase composition dependences on temperature (T-x) and pressure (P-x) for the Hg-Al alloy during vacuum distillation. The objects of research comprised Hg-Al alloys having the following composition, mole %: 20–80 Hg; 80–20 Al, whose formation may occur during the processing of copper anode slime upon producing commercial selenium concentrate. A simplified molecular interaction volume model was used to calculate the activity coefficients of the components in the Hg-Al alloy. Phase diagrams of temperature (T-x) and pressure (P-x) are used for the preliminary selection of temperature and pressure in the system, as well as for the evaluation of the separation efficiency of components. The novelty of the research stems from calculating activity coefficients using the selected simplified model. Saturated vapour pressures for Hg (p*Hg) and Al (p*Al) were calculated in the temperature range of 823–1073 K. The high values of the p*Hg / p*Al ≥ 3 . 1010 ratio and separation coefficient llogβHg ≥ 10 provide theoretical premises for selective extraction of these metals by vacuum distillation, where mercury is concentrated in the gas phase (βHg > 1) and aluminium in the liquid phase. The values of excess Gibb’s energy, enthalpy and entropy changes for the liquid-gas interface of Hg-Al alloy were determined: ΔGE/m = 1–3 кJ/mol; = 1-3 kJ/mol; +-ΔGE/m = 0,03–0,17 kJ/mol. The practical significance of the research lies in minimising the number of initial experiments during the processing of Hg-Al compositions for optimising the temperature and pressure in the vacuum distillation process.

The role of β phase in the morphology evolution of α lamellae in a dual-phase titanium alloy during high temperature compression

The evolution behavior of α lamellae and evolution relationship between α lamellae and β phase in TC17 alloy during isothermal heating and subsequent compression were investigated. The results show that the α/β interface of TC17 alloy is made up of stable terrace plane and movable ledge plane. The ledge plane migrates along the length direction of α lamellae during isothermal heating, which results in rapid decrease of length and slow decrease of thickness of α lamellae. During compression, the continuous dynamic recrystallization (CDRX) are the main evolution mechanism of α and β phases. The slip systems of β phase are easily activated and the slip in β phase (i.e. (110)[1̅11]) will promote the slip in α phase (i.e. (0001)[112̅0]) at the initial stage of compression. Thus the CDRX of β phase is preferentially initiated by more activated slip and it will promotes the CDRX of α phase, then the HABs are formed in α lamellae. Meanwhile, the β stabilized elements Cr and Mo diffuse into the α/α boundaries in a short-time deformation. The α→β phase transformation is promoted by the enrichment of Cr and Mo elements and finally the α lamellae are separated with further compression.

Ag-Pd alloy decorated ZnIn2S4 microspheres with optimal Schottky barrier height for boosting visible-light-driven hydrogen evolution

• Ag-Pd alloy/ZnIn 2 S 4 microspheres were achieved by a chemical reduction method. • Ag-Pd alloy loading enhanced light-absorption and charge separation of ZnIn 2 S 4 . • Ag-Pd/ZIS composites showed the excellent photocatalytic H 2 evolution performance. • Appropriate Schottky barrier height benefited the charge carrier separation. • Theoretical calculation and experimental verification confirmed optimal Ag-Pd alloy. Rapid charge carrier recombination rate and insufficient light harvesting capacity are two dominating drawbacks encountered in zinc indium sulfide (ZnIn 2 S 4 ) for photocatalytic applications. Herein, a chemical reduction method was performed to combine bimetallic Ag-Pd alloy nanoparticles (NPs) with spherical-like ZnIn 2 S 4 (ZIS). By optimizing Ag:Pd molar ratio and overall loading amount, the optimal Ag 0.25 Pd 0.75 -ZIS sample exhibited a maximum H 2 evolution rate (125.4 µmol/h) under visible light, which was higher than that of ZIS, Ag-ZIS and Pd-ZIS. The loading of Ag NPs contribution to PHE reaction by its plasmonic effect was negligible compared to that of Pd loading (Schottky effect). The apparent quantum yield (AQY) values over Ag 0.25 Pd 0.75 -ZIS sample could reach up to 18.3% at 400 nm and 15.8% at 420 nm. The enhanced activity for photocatalytic hydrogen evolution (PHE) over Ag 0.25 Pd 0.75 -ZIS sample was mainly due to the bimetallic synergistic effect that presented as follows. Firstly, the plasmon hybridization by loading Ag-Pd bimetallic alloy can significantly increase light harvesting capacity of ZIS. Secondly, the optimal Schottky barrier height formed between Ag-Pd alloy and ZIS interface was beneficial for prolonging electron-hole pair lifetimes, promoting charge carrier separation and thus facilitating PHE efficiency. Density functional theory (DFT) analysis indicated that the adsorption energy of H* over Pd 0.75 Ag 0.25 alloy was very close to zero and thus theoretically possessed the highest activity for H 2 evolution, which is in line with experimental results. Combined theoretical calculation with experimental results, a reasonable photocatalytic mechanism was proposed and verified.

The evolution of microstructure, micromechanical and magnetic properties of FeCoNiSi alloys solidified under high pressure

A comprehensive study has been conducted on the effects of high-pressure solidification (HPS) on the evolution of microstructures, micromechanical properties, and magnetic properties of FeCoNiSi alloys. As solidification pressure increases(up to 7GPa), FeCoNiSi alloy's columnar grain changes into an equiaxed grain, and the grain size and Ni-rich precipitates are significantly refined. Furthermore, HPS facilitates the conversion of in-coherent matrix/precipitates interface of alloy solidified under atmospheric pressure into semi-coherent, which reduces the pinning effect of phase boundaries on the motion of the magnetic domains and enhances the exchange coupling between matrix and precipitates. As FeCoNiSi alloy solidifying under 7GPa, the maximum magnetic permeability (μ m ) is significantly increased (from 52,600 to 113,000), the inherent coercivity is decreased by 29.5%, and the saturation magnetic polarization( Js ) is increased by 21%. In addition, the high temperature magnetic properties of FeCoNiSi alloys are improved by HPS. Furthermore, HPS produces compressive stress in both the precipitates and matrix, which significantly improved the modulus of precipitates and matrix (i.e. from 171GPa to 215 GPa in matrix),as well as microhardness (i.e. from 5.46 GPa to 10.65 GPa in matrix). Based on the results of these studies, HPS is capable to improve the comprehensive properties of magnetic alloys significantly. • The J s and μ max (H MC ) of FeCoNiSi alloy are increased (decreased) by 21% and 114% (29.5%) after solidified under 7GPa. • HPS produces compressive stress in the precipitates and matrix and significantly improved the modulus and microhardness. • HPS refine the microstructure of FeCoNSi alloy and result in the semi-coherent interface. • The semi-coherent interface enhances the exchange coupling effect between precipitates and matrix.

Numerical Simulation on Thermal Stresses and Solidification Microstructure for Making Fiber-Reinforced Aluminum Matrix Composites.

The fabrication of fiber-reinforced metal matrix composites (MMCs) mainly consists of two stages: infiltration and solidification, which have a significant influence on the properties of MMCs. The present study is primarily focused on the simulation of the solidification process and the effect of the active cooling of fibers with and without nickel coating for making the continuous carbon fiber-reinforced aluminum matrix composites. The thermomechanical finite element model was established to investigate the effects of different cooling conditions on the temperature profile and thermal stress distributions based on the simplified physical model. The predicted results of the temperature distribution agree well with the results of the references. Additionally, a three-dimensional cellular automata (CA) finite element (FE) model is used to simulate the microstructure evolution of the solidification process by using ProCAST software. The results show that adding a nickel coating can make the heat flux smaller in the melt, which is favorable for preventing debonding at the coating/fiber and alloy interface and obtaining a finer microstructure. In the presence of the nickel coating, the number of grains increases significantly, and the average grain size decreases, which can improve the properties of the resultant composite materials. Meanwhile, the predicting results also show that the interfaces of fiber–coating, fiber–melt, and coating–melt experience higher temperature gradients and thermal stresses. These results will lead to the phenomenon of stress concentration and interface failure. Thus, it was demonstrated that these simulation methods could be helpful for studying the solidification of fiber-reinforced MMCs and reducing the number of trial-and-error experiments.

Development of aluminum alloy/galvanized steel joining method using refill friction stir spot welding

Friction stir spot welding (FSSW) is one of the solid-state welding method and dissimilar material joining by FSSW has been investigated. However, a removable coating is required to form a clean surface on the lower plate in conventional FSSW method. Therefore, we have developed a new dissimilar material joining method – scrubbing refill FSSW (Sc-RFSSW) – and Sc-RFSSW provides higher joint strength than conventional FSSW methods in joining the aluminum alloy and non–coated mild steel. In this study, the mechanical properties and metallurgical joining interface of an aluminum alloy and a hot-dip galvanized (GI) coated steel joint by Sc-RFSSW were investigated. In addition, a new tool tip shape was examined to improve the interfacial cleaning effect.

First-principles calculations of (0 0 1)α-Al//(0 0 1)θ' interface in Al-Cu alloys: Atomic structure, bonding strength, stability and electronic properties

Using density-functional theory, the stability of the (001) Al and (001) θ' surfaces is evaluated by calculating their surface energy. The bonding strength and stability of the (001)α-Al//(001)θ' interface with four different atomic stacking sequences (Cu-HCP, Cu-OT, Al-HCP and Al-OT) are determined by first-principles tensile test and interfacial energy calculation, respectively. Results show that the stability of the (001) θ' surface is significantly weaker as compared to the (001) Al surface. The interface with the HCP stacking sequence is the most stable geometry and possesses the lowest interfacial energy and the strongest interface bonding. A relationship is established among the interface bonding strength, interfacial energy and interface stability. The interface with larger the interface bonding strength possesses smaller interfacial energy and higher interface stability. Analysis in terms of the electronic structure shows that the average absolute value of Bader charge of terminating Cu (or Al) of the (001) θ' surface is quite large, which results in the weak stability of the (001) θ' surface. The high bonding strength and stability for the interface with the HCP stacking sequence are ascribed to the strong charge accumulation between atoms across the interface.

Transient behaviour of electrovortex flow in a cylindrical container

The mechanical behaviour of the oxide film that develops at the metal-air interface of molten A356 aluminum alloy is investigated in relation to the oxidation level. Based on two previous papers - the first one focusing on the chemical aspects of the oxidation process at the liquid surface of molten aluminum, the second one focusing on its mechanical characterization, the present paper aims at reconciling these two approaches usually considered separately in the literature and proposes a stand-alone mechano-chemical model. The oxidation process is first characterized from thermogravimetric analyses together with scanning electron microscopy imaging. Then the mechanical properties of the oxide layer are determined at a given oxidation level, making use of a new annular MHD surface viscometer placed inside a chemical reactor. The kinetic study delivers a better understanding of the oxidation process involved at the surface of the A356 alloy and leads to the development of a revised version of the Deal−Grove model. In addition, the mechanical study reveals the highly viscous and shear-thinning behaviours of the oxide layer. Figs 3, Refs 14.

Revealing the surface structure-performance relationship of interface-engineered NiFe alloys for oxygen evolution reaction

NiFe alloys are among the most promising electrocatalysts for oxygen evolution reaction (OER). However, a comprehensive study is yet to be done to reveal the surface structure-performance relationship of NiFe alloys. In particular, the role of the ultrathin surface oxide layer, which is unavoidable for pure NiFe alloys, is always neglected. Herein, a series of NiFe alloys with different Ni/Fe ratios are fabricated. It is found that different Ni/Fe ratios lead to significant differences in surface composition and structure of the NiFe alloys, and thus affect their catalytic performance. Then, the oxide/metal interface of the Ni4Fe1 alloy is tailored by adjusting the hydrogenation temperature to further understand the surface structure-activity relationship, and the optimal OER performance is achieved at the oxide/metal interfaces that have suitable surface Fe/Ni ratio and an appropriate amount of oxygen vacancies. In-situ Raman characterization shows that the Ni4Fe1 alloy with well-tailored oxide/metal interface facilitates the formation of active species. Density functional theory calculations demonstrate that the ultrathin surface oxide layers are responsible for the high catalytic activity of the NiFe alloys, and that the quantity of oxygen vacancies in the surface oxides affects the adsorption energy of O* and thus to a great extent determines the catalytic activity.

Microstructure and properties at bonds of diamond grains and Ni[sbnd]Cr filler alloy by fiber laser brazing

Advanced laser technology has been used in laser brazing to bond diamond grains in metal matrix to achieve some distinctive advantages such as high protrusion heights and large gaps of diamond grains. However, laser brazing has not been widely adopted as expected to produce various diamond tools since that bonding mechanisms, microstructures and characteristics of bonded interfaces have not fully investigated. In this paper, the experimental study was performed for using fiber laser brazing to bond diamond grains on steel substrate with NiCr filler alloy. Microstructures, graphitization, and shear force at the bonded interface were especially analyzed. The experiments led to the following outcomes: (1) the interface of diamond grains and NiCr alloy was a wavy surface with an average thickness of 7 μm. (2) Two types of carbide, i.e., Cr3C2 and Cr7C3, were generated on the brazed surface; Cr3C2 was lath-shaped and generated at first, and Cr7C3 was prismatic and built upon Cr3C2. (3) The interface of diamond grains and NiCr alloy was rough and accompanied by graphitization. (4) The shearing test showed that an average force of 138 N was applied to debone single diamond grain from filler metal.

Interfacial bonding and corrosion behaviors of HVOF-sprayed Fe-based amorphous coating on 8090 Al-Li alloy

To solve corrosion problems of Al-Li alloys in marine environment, Fe-based amorphous coating was first deposited on 8090 Al-Li alloy by high velocity oxy-fuel spraying. The microstructure, interfacial bonding and corrosion behaviors of the Fe-based amorphous coating are investigated. It is found that the coating is mainly composed of amorphous splats, but a few crystalline phases can be observed in the splats or splat surfaces. Even so, the corrosion resistance of the coated 8090 alloy is 7 times higher than that of the bare 8090 alloy. Moreover, due to the partially melting and rapid cooling of substrate during metal droplet deposition, there is an amorphous transition zone at the AMC/8090 alloy interface, indicating the formation of localized metallurgical bonding. Owing to the metallurgical bonding interface and the high compactness of coating, the adhesion strength of Fe-based amorphous coating can reach 58.2 MPa. In 3.5 wt% NaCl solution, a bipolar passive film can be formed on the Fe-based amorphous coating, and its compactness decreases as the polarization potential increases. Because of the aggregation of Cr element and the uneven passive film, the crystallized splats and crystallized splat surfaces are eroded preferentially, leading to the formation of corrosion channels and the corrosion failure of coating. The present work provides a guidance for the design of corrosion-resistance coatings on Al-Li alloys.