Hot Corrosion Behavior of Ce-Modified NiAl Coating by Cl-Containing Na2SO4 at 1050 °C

Wang, Hongyu; Wang, Han; Kan, Peng; Zhao, Qian; Zhang, Xiang; Ding, Yang

doi:10.1007/s11085-018-9856-3

Cited by 4 publications

(2 citation statements)

References 36 publications

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“…According to Equations ( 1) and (2) [32], a eutectic reaction occurs between Na 2 SO 4 and NaCl. According to Equation (3), Cl 2 combines with Al to generate gaseous AlCl 3 [33,34]. Following that, according to Equation (4) [35], a component of AlCl During the entire hot-salt corrosion test, the oxidation and degradation reactions occur simultaneously, but the upward diffusion rate of Fe is relatively slow at the beginning, as shown in Figure 7(A2).…”

Section: Resultsmentioning

confidence: 97%

“…According to Equations ( 1) and ( 2) [32], a eutectic reaction occurs between Na2SO4 and NaCl. According to Equation (3), Cl2 combines with Al to generate gaseous AlCl3 [33,34]. Following that, according to Equation (4) [35], a component of AlCl3 combines with O2 to generate Al2O3, but another fraction of AlCl3 inevitably overflows, resulting in weight loss and a porous surface (see Figure 7a (A1)).…”

Section: Resultsmentioning

confidence: 99%

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Understanding the Role of a Cr Transition Layer in the Hot-Salt Corrosion Behavior of an AlSi Alloy Coating

Liu

Chen

et al. 2022

Coatings

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The effect of a chromium (Cr) transition layer on the hot-salt corrosion behavior of an AlSi alloy coating was studied. Hot-salt corrosion experiments were performed at 650 °C and corrosion kinetic curves were plotted. The weight gain of the AlSi-coated samples increased to 0.89 mg/cm2 at 100 h and then decreased steadily to 0.77 mg/cm2 at 200 h. The weight of the AlSi-coated samples with the addition of a Cr transition layer increased immediately to 0.79 mg/cm2 at 20 h and then gradually increased to 0.85 mg/cm2 at 200 h. This Cr diffusion promoted the preferential creation of an Al2O3 layer, which effectively hindered the upward diffusion of Fe and also resulted in the production of a Cr2O3-SiO2 layer, which impeded the multi-scale salt mixture’s penetration. The Cr diffusion also caused a notable seal-healing effect, which healed the micro-pores. These oxidation and degradation reactions were considerably repressed by the high barrier properties of these oxide layers and the dense surface, resulting in the increased hot-salt corrosion resistance of the AlSi alloy coating. The current findings provide a feasible strategy for the design of a diffusion barrier layer of a thermal protective coating on martensitic stainless steel.

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Section: Resultsmentioning

confidence: 97%

“…According to Equations ( 1) and ( 2) [32], a eutectic reaction occurs between Na2SO4 and NaCl. According to Equation (3), Cl2 combines with Al to generate gaseous AlCl3 [33,34]. Following that, according to Equation (4) [35], a component of AlCl3 combines with O2 to generate Al2O3, but another fraction of AlCl3 inevitably overflows, resulting in weight loss and a porous surface (see Figure 7a (A1)).…”

Section: Resultsmentioning

confidence: 99%

Understanding the Role of a Cr Transition Layer in the Hot-Salt Corrosion Behavior of an AlSi Alloy Coating

Liu

Chen

et al. 2022

Coatings

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Improvements in Hot Corrosion Behavior of CO2 Laser-Welded Fe-Based A-286 Alloy in an Aggressive Salt Environment by High-Velocity Oxy-Fuel Coating

Arivarasu¹

2022

J. of Materi Eng and Perform

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Synergistic effect of Pt and Hf on the early-stage oxidation behaviour of NiAl coating at 1000 °C

Yang

Ren

Deng

et al. 2022

Corrosion Communications

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Hot Corrosion Behavior of Ce-Modified NiAl Coating by Cl-Containing Na2SO4 at 1050 °C

Cited by 4 publications

References 36 publications

Understanding the Role of a Cr Transition Layer in the Hot-Salt Corrosion Behavior of an AlSi Alloy Coating

Understanding the Role of a Cr Transition Layer in the Hot-Salt Corrosion Behavior of an AlSi Alloy Coating

Improvements in Hot Corrosion Behavior of CO2 Laser-Welded Fe-Based A-286 Alloy in an Aggressive Salt Environment by High-Velocity Oxy-Fuel Coating

Synergistic effect of Pt and Hf on the early-stage oxidation behaviour of NiAl coating at 1000 °C

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