Effect of Cr Content on Corrosion Resistance of Ni–xCr–Mo Laser-Cladding Coatings under H2S-Induced High-Temperature Corrosion Atmosphere

Liu, Congcong; Liu, Zongde; Wang, Xinyu; Zheng, Chao

doi:10.3390/ma15051885

Cited by 8 publications

(6 citation statements)

References 34 publications

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“…As a result of the potential difference between the FeMo 2 B 2 phase and the surrounding phases, it may have an accelerating effect on dissolution. Similarly, it has been reported in the literature that the low molybdenum-containing phase in the region adjacent to the high molybdenum-containing phase in the eutectic structure will have corroded preferentially and caused intergranular corrosion [70]. It was also clearly seen in the SEM images.…”

Section: Corrosion Behaviorsupporting

confidence: 84%

Effect of the Molybdenum Content on Wear and Corrosion Behavior of Fe-B-Based Surface-Alloyed Layer

Kocaman

2023

Coatings

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In this study, Fe-Mo-B-based hardfacing electrodes containing different amounts of Mo were coated on an AISI 1020 steel substrate using the electric arc welding method. The findings show that molybdenum is highly effective on the microstructure and minor changes in the coating composition affect the phases and morphological properties. In the hardness tests, an increase of 73% was achieved in the Fe14Mo2B4-based hardfacing coating, compared to the base material, and a 30% increase was achieved, compared to the Fe16B4-based coating. The highest hardness value was measured as 56.4 HRC and the highest phase hardness was measured as 3228 HV in the FeMo2B4 phase. The lowest wear rate was measured in the Fe14Mo2B4-based coating. The wear rate of the Fe14Mo2B4-based coating was 8.1 times lower than that of the substrate material and 4.7 times lower than that of the Fe16B4-based coating. According to corrosion test results, the highest corrosion resistance was obtained in the Fe16B4-based coating. The current density value of the Fe16B4-based coating was measured to be 13.6 times lower than that of the substrate material.

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Section: Corrosion Behaviorsupporting

confidence: 84%

Effect of the Molybdenum Content on Wear and Corrosion Behavior of Fe-B-Based Surface-Alloyed Layer

Kocaman

2023

Coatings

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“…In addition to the basic Ni element, there is also a certain amount of Cr, B, Si and other elements in the Ni-based self-fluxing alloy powder. Cr is a solid solution element that can produce lattice distortion with Ni in a limited solid solution, reducing the layer misalignment energy and atomic diffusion ability, forming a stable solid solution, and resulting in solid solution strengthening and improving the hardness, corrosion resistance and wear resistance of the coatings [9][10][11][12]. At the same time, the presence of Cr is conducive to the formation of dispersed fine carbide in the coating, B and Si can purify the molten pool environment and improve the quality of the coatings.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and properties of plasma cladding Ni-based alloy coated on 40Cr Surface

Xun,

Liu,

Pan

et al. 2023

Surf. Topogr.: Metrol. Prop.

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Three Ni-based alloys (Ni60, Ni65, Ni60W) were selected to be coated on the surface of 40Cr and 20 steel. The microstructure, phase composition and elemental distribution of the coatings were characterised respectively to discuss the effects of different substrates, cladding materials, and preparing processes. The corrosion and thermal fatigue behaviour of the coatings were investigated. The results show that the coatings prepared by plasma cladding have a dense microstructure with few defects and a white bright band of a certain thickness was formed between the coating and the substrate. The white bright band between the coating prepared by flame spraying and the substrate was not obvious. The main phase compositions of the coatings are Cr23C6, Cr7C3, Ni2.9Cr0.7Fe0.36 and FeNi3 phases, with the W2C phase also present in the Ni60W coating. The heat-affected zone (HAZ) of the coating is influenced by the coating preparing processes, substrate material and process state of substrates: the size of the HAZ of the plasma cladded coating is smaller than that of the flame sprayed coating, the HAZ of the 40Cr substrate is smaller than that of the 20 steel, and the HAZ of the tempered 40Cr substrate is smaller than that of the annealed 40Cr substrate. The Ni-based alloy coating can effectively improve the surface hardness of the substrate. The Ni65 alloy powder is the most effective (HV0.5992), followed by the Ni60W alloy powder (HV0.5798) and finally the Ni60 alloy powder (HV0.5712). The Ni65 alloy coating has the relatively best thermal fatigue properties, followed by the Ni60W alloy coating and the Ni60 alloy coating is the relatively worst. At the same time, the corrosion resistance of different Ni-based alloy coatings is consistent with the thermal fatigue properties of the coatings.

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“…Typical Ni-Cr-Mo alloys are Hastelloy series alloys and Chromet series alloys without W (Liu et al, 2022). This kind of alloy has a high resistance to chloride and acid corrosion.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Pore Structure of Ni-Cr-Mo-Cu First Order Gradient Porous Materials

Kuang,

Li,

Liu

et al. 2023

Smart Manufacturing and Material Processing (SMMP)

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The support of Ni-Cr-Mo-Cu porous material was prepared by the activation reaction sintering method using Ni, Cr, Mo and Cu element powders as raw materials, and then by brushing the element powders with different particle sizes on the surface of the support, after vacuum sintering, Ni-Cr-Mo-Cu gradient pore size porous material was obtained. Phase composition, morphology, element distribution and pore structure parameters were tested by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Electronic Differential System (EDS), pore size tester and other test methods were used to characterize. The results show that the Ni-Cr-Mo-Cu gradient porous material membrane layer is relatively complete and the elements are evenly distributed. The maximum pore size of the matrix is 13.3 μm, and permeability is 96.3 m3·m-2·h-1·KPa-1. When the D50 of the brushed powder is 20 μm, the maximum pore size of the first order gradient pore size porous material is 10.4 μm, the permeability is 83.7 m3·m-2·h-1·KPa-1. Compared with the matrix material, the permeability of the first order gradient porous material decreased by 13.1%, and the filtration accuracy was improved on the basis of retaining high permeability.

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Effect of Cr Content on Corrosion Resistance of Ni–xCr–Mo Laser-Cladding Coatings under H2S-Induced High-Temperature Corrosion Atmosphere

Cited by 8 publications

References 34 publications

Effect of the Molybdenum Content on Wear and Corrosion Behavior of Fe-B-Based Surface-Alloyed Layer

Effect of the Molybdenum Content on Wear and Corrosion Behavior of Fe-B-Based Surface-Alloyed Layer

Microstructure and properties of plasma cladding Ni-based alloy coated on 40Cr Surface

Preparation and Pore Structure of Ni-Cr-Mo-Cu First Order Gradient Porous Materials

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