Corrosion Behaviors of Nitride Coatings on Titanium Alloy in NaCl-Induced Hot Corrosion

Zhang, Mingming; Feng, Yipeng; Wang, Yahui; Niu, Yanhui; Li, Xin; Li, Yongfeng; Su, Jianxiu; Zhu, Shenglong; Wang, Fuhui

doi:10.1007/s40195-021-01264-8

Cited by 12 publications

(3 citation statements)

References 46 publications

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“…Furthermore, as human activities are increasingly expanding to coastal areas, the hot-end components in these regions face a more serious corrosive environment. The presence of NaCl particles in humid air can easily deposit on the surface of these components, accelerating the process of hot corrosion [4][5][6]. In order to mitigate or prevent hot corrosion, the preparation of protective coatings on the surface of materials is a highly economical and universally applicable method [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability and Hot Corrosion Performance of the AlCoCrFeNi2.1 High-Entropy Alloy Coating by Laser Cladding

Zhang,

Ji,

Yang

2023

Materials

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Both crack-free AlCoCrFeNi2.1 eutectic high-entropy alloy (EHEA) and Y and Hf co-doping AlCoCrFeNi2.1 EHEA (YHf-EHEA) coatings were prepared by laser cladding. The solidification microstructure, thermal stability, and hot corrosion performance of the coatings at 900 °C under 75% Na2SO4 + 25% NaCl molten salts were investigated. The experimental results showed that the structure of the as-deposited coatings consisted of FCC and BCC/B2 phases. After heat treatment, an Al-rich L12 phase was precipitated in the FCC phase of all coatings. The grain sizes of the EHEA and YHf-EHEA coatings after heat treatment at 900 °C for 10 h increased by 27.5% and 15.7%, respectively, compared to the as-deposited coatings. Meanwhile, after hot corrosion, the spallation areas of the YHf-EHEA and EHEA coatings accounted for 14.98% and 5.67% of the total surface area, respectively. In this study, the Y and Hf co-doping did not change the microstructure morphology and phase structure of the coatings but did improve the thermal stability and resistance of the hot corrosion oxide scale spallation, providing a certain amount of data and theoretical support for the application of EHEA coatings as high-temperature protective coatings.

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Section: Introductionmentioning

confidence: 99%

Thermal Stability and Hot Corrosion Performance of the AlCoCrFeNi2.1 High-Entropy Alloy Coating by Laser Cladding

Zhang,

Ji,

Yang

2023

Materials

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“…According to previous research, the application of protective surface coatings is a preferred way to enhance corrosion resistance [20]. Naveen Kumar et al [21] found that 86WC-10Co-4Cr-coated AISI316 stainless steel exhibited a much lower weight increase (1.1880 mg/cm 2 ) than untreated specimens (2.6857 mg/cm 2 ) in 88Fe 2 (SO 4 ) 3 -12%Na 2 SO 4 corrosive environment for 50 cycles at 650 • C. Du et al [22] prepared TiSiCN/Ag nanocomposite coatings on titanium alloy substrates and found that the mass gain in the titanium substrate was 2.750 mg/cm 2 , while the mass gain in the coating was 1.937 mg/cm 2 after 2 of 17 hot etching at 550 • C for 72 h. These coatings provide additional protection by preventing contaminated salt from attacking the substrate [21][22][23][24][25][26][27][28]. One promising coating technique for improving the hot corrosion resistance of titanium alloys is the preparation of aluminate coatings [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

A Study on the High-Temperature Molten Salt Corrosion Resistance of Hot-Dip Aluminum/Carburizing Composite Coating on Ti65 Titanium Alloy

Wang,

2023

Coatings

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This article presents a new method for preparing a coating on Ti65 titanium alloy using a two-step procedure comprising hot-dipped aluminum and solid carburization. The effects of the carburization on the hot-dipped aluminum coating against the presence of a NaCl deposit at 810 °C were systematically studied. In this article, the microstructure, morphology, phase composition of the coating, and corrosion products were investigated using SEM (Scanning Electron Microscopy), EDS (Energy Dispersive Spectrometer), and X-ray diffraction. The results indicated that the corrosion resistance of the hot-dip aluminum/carburizing composite coating was not significantly enhanced with the hot-dip aluminum coating. This can be attributed to the formation of TiC and Ti3AlC after carburization, which promoted the formation of loose and unprotected TiO2 in the coating during molten salt corrosion. In addition, the oxidation of the carbon atom into CO2 led to a high concentration of pores in the coating, creating channels for NaCl to penetrate the coating and accelerate the corrosion rate.

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“…The effectiveness of the protection was related to the SiO 2 layer formed during a hot corrosion test. TiN and TiAlN coatings were deposited using arc ion plating on titanium alloys to study their hot corrosion resistance when they were exposed to NaCl at 600 • C [42]. A 12 µm thick TiN coating showed poor corrosion resistance due to its porous and nonprotective oxide scale, whereas for a TiAlN coating produced in a corrosive environment, an Al 2 O 3 scale acted as a barrier retarding the inward transport of corrosive species.…”

Section: Introductionmentioning

confidence: 99%

Influence of Silicon and Chromium on the Na2SO4-Induced Hot Corrosion Behavior of Titanium Alloys

Mitoraj-Królikowska

2023

Crystals

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Titanium alloys are widely used as construction materials in the aerospace and automotive industries. They have many advantages but also have limitations related to their susceptibility to high-temperature oxidation and hot corrosion. Many efforts to increase the lifetime of components made of titanium alloys have been reported in the literature; the most promising ones involve the deposition of coatings. The present paper is focused on the development of coatings containing chromium and silicon, and their further evaluation in hot corrosion tests. It was proved that the Cr-Si coatings were more effective than Si coatings alone in protecting the titanium alloys against Na2SO4-induced hot corrosion at 800 °C. The enhanced corrosion resistance was attributed to the preferential formation of a thick and continuous SiO2 layer on the surface and—in the case of titanium aluminide alloy—the growth of an Al2O3-rich inner layer of the scale, promoted by chromium.

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Corrosion Behaviors of Nitride Coatings on Titanium Alloy in NaCl-Induced Hot Corrosion

Cited by 12 publications

References 46 publications

Thermal Stability and Hot Corrosion Performance of the AlCoCrFeNi2.1 High-Entropy Alloy Coating by Laser Cladding

Thermal Stability and Hot Corrosion Performance of the AlCoCrFeNi2.1 High-Entropy Alloy Coating by Laser Cladding

A Study on the High-Temperature Molten Salt Corrosion Resistance of Hot-Dip Aluminum/Carburizing Composite Coating on Ti65 Titanium Alloy

Influence of Silicon and Chromium on the Na2SO4-Induced Hot Corrosion Behavior of Titanium Alloys

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