Effects of Ni addition on corrosion behaviors of laser cladded FeSiBNi coating in 3.5% NaCl solution

Zhou, Jiali; Dejun, Kong

doi:10.1016/j.jallcom.2019.05.012

Cited by 57 publications

(15 citation statements)

References 36 publications

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“…However, from S1 to S3, the electrochemical corrosion process destroys the passivation film, and the electrolyte contacts the material surface to form pitting corrosion, resulting in the passivation area on the polarization curve is not obvious. [42] The Tafel curve extrapolation method is used to obtain the main electrochemical parameters. I corr and E corr show the corrosion kinetics and thermodynamic stability of materials, respectively.…”

Section: Corrosion Behaviormentioning

confidence: 99%

Novel Gradient Alloy Steel with Quasi‐Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior

Zhang

Zhou

et al. 2021

steel research int.

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In this article, a quasi‐continuous ratio gradient alloy steel (GAS) with a 24CrNiMo high‐strength low‐alloy steel matrix for high‐speed railway brake discs is fabricated by selective laser melting (SLM). The composition of GAS is X% 24CrNiMo + (1–X)% wear‐resistant stainless steel (WSS), in which X is 100, 65, 35, and 0. The relationship between the microstructure and the corrosion resistance is intensively studied by electron backscatter diffraction (EBSD) and potentiodynamic electrochemical equipment. With the increase in the content of WSS, the low angle grain boundaries of the GAS increases, and the microstructure refines and the texture intensity decreases. The passivation film of the external WSS strengthening layer is dense; the corresponding corrosion potential and corrosion current density are −0.109 V and 2.08 × 10−8 A cm−2, respectively. The corrosion current density is about 1% of the substrate 24CrNiMo, and the corrosion resistance of the material is significantly improved.

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Section: Corrosion Behaviormentioning

confidence: 99%

Novel Gradient Alloy Steel with Quasi‐Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior

Zhang

Zhou

et al. 2021

steel research int.

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show abstract

“…[20] It mainly includes electroplating, [21] electroless plating, [22] embedding infiltration, [23] low-pressure plasma spraying, [24] high-velocity thermal spraying, [25] magnetron sputtering, [26] mechanical alloying (MA), [27] chemical vapor deposition, [28] physical vapor deposition, [29] and laser cladding. [30] Among them, the preparation of coating by MA is high efficiency and low energy consumption. [31] MA is a process in which different powders are repeatedly extruded and deformed by high-energy ball milling and then alloyed by microforging, fracture, cold welding, and interatomic diffusion.…”

Section: Introductionmentioning

confidence: 99%

High‐temperature corrosion of mechanically alloyed Cr–AlSi12 composite coatings on Ti–6Al–4V alloy substrate

Jiang

Feng

Shen

2022

Materials & Corrosion

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In the present work, the Cr-AlSi12 composite coatings were successfully synthesized on the Ti-6Al-4V alloy substrate by using the mechanical alloying method. The effects of raw Cr particle size, milling duration, and annealing treatment on the preparation of the coatings were investigated. The asprepared coatings consisted of the inner coating layer with coarse Cr particles and the outer coating layer with refined and highly homogenized structure. The annealing treatment could promote element diffusion and alloying; it was favorable to the densification and oxidation resistance of the coatings. There is a highly densified alloyed layer in the outer coating. The annealed coating showed excellent friction and wear resistance. After the oxidation process, the annealed coating showed the best high-temperature oxidation resistance. The oxidized annealed coating exhibited four layers, which included the thin Al 2 O 3 oxide film, the homogenized alloyed layer, the composite layer consisted of Al 2 O 3 and coarse Cr particles surrounded by alloyed layer, and the Al 3 Ti diffusion layer. This was favorable to the improvement of high-temperature oxidation resistance. The oxidation process of the annealed coating was elaborated.

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“…However, the wear and corrosion resistance of Febased alloy cladding layers are limited, which cannot meet the performance requirements of some application fields [4][5][6]. Therefore, researchers have considered to add alloying elements into Fe-based alloy to improve the properties of the coatings [7][8][9][10][11][12][13]. For example, Gao et al [10] studied the effect of Ti content on the microstructure and hardness of laser cladding Fe-based coating.…”

Section: Introductionmentioning

confidence: 99%

“…However, when the Ti content in the coating reached 4 wt%, the dilution rate of the coating increased and coarse grain precipitates formed in the coating, so the hardness decreased. The effect of Ni on the corrosion behavior of FeSiBNi cladding layer in 3.5% NaCl solution was studied by Zhou et al [11]. They found that with the increase of Ni content, the amorphous content of the coating increased, together with the corrosion potential and the charge transfer resistance of the coating.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, wear and electrochemical behaviors of laser cladding Fe-based coatings with various molybdenum contents

Li¹,

Wang²,

Zhang³

et al. 2022

Mater. Res. Express

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Fe-based alloy coatings with different Mo contents were fabricated on 45 steel substrates by laser cladding. X-ray diffractometer (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) were used to analyze the phase composition and microstructural evolution of the coatings. The effects of Mo addition on the wear and electrochemical behaviors of the coatings were analyzed by ball-on-disc wear tester and electrochemical workstation. The results showed that the addition of Mo could help refine grains and promote the transition of dendrites to equiaxed grains. With the increase of Mo content, the hard phases changed from Fe2B to Mo2FeB2. Mo and Cr tend to aggregate in the intercrystalline regions in the form of hard phases. When the Mo content was 4.8 wt.%, the hardness increased by 3.6 times compared with that of the substrate. The wear resistance of the coatings increased with the Mo addition. Mo played the role of fine grain strengthening and solid solution strengthening, which was beneficial for the improvement of the hardness and wear resistance. Polarization curves and electrochemical impedance spectroscopy test results revealed that the addition of Mo could improve the corrosion resistance of Fe-based coating.

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Effects of Ni addition on corrosion behaviors of laser cladded FeSiBNi coating in 3.5% NaCl solution

Cited by 57 publications

References 36 publications

Novel Gradient Alloy Steel with Quasi‐Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior

Novel Gradient Alloy Steel with Quasi‐Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior

High‐temperature corrosion of mechanically alloyed Cr–AlSi12 composite coatings on Ti–6Al–4V alloy substrate

Microstructure, wear and electrochemical behaviors of laser cladding Fe-based coatings with various molybdenum contents

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