Effects of Different Surface Native Pre-Oxides on the Hot Corrosion Properties of Nickel-Based Single Crystal Superalloys

Chen, Zehao; Li, Shusuo; Wu, Mengmeng; Pei, Yanling; Gong, Shengkai; Zhang, Heng

doi:10.3390/ma13245774

Cited by 6 publications

(3 citation statements)

References 52 publications

(62 reference statements)

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“…As the reaction proceeds, the initially formed sulfides undergo decomposition. The generated S 2− can form new sulfides along the grain boundaries or diffuse into the grain interior as a solid solution [36,37]. Both Mn and Cr elements tend to diffuse into the oxide layer, which results in the formation of a region at the oxide layer/metal interface that is enriched in Fe elements and has reduced Mn and Cr content.…”

Section: Cross-sectional Morphology and Phase Analysis Of Coating Aft...mentioning

confidence: 99%

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Insight into the Hot Corrosion Behavior of FeMnCrSi/TiC Coatings at 900 °C

Tang,

Li,

Huang

et al. 2024

Metals

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This study explores the deposition of an Fe-MnCrSi/TiC coating on 45 steel surfaces using high-velocity arc spraying technology, examining the microstructure and hot corrosion behavior of the resultant layer. The microstructure of the FeMnCrSi/TiC coating primarily consists of an α-Fe (BCC) solid solution, composed of Fe, Mn, Cr, Si, C, and other elements, with a minor presence of β-Fe (FCC) solid-solution phase and unmelted TiC particles. Following 100 h of cyclic 900 °C hot corrosion, Mn on the coating surface preferentially oxidizes, forming a manganese-rich oxide layer. This process reduces the oxygen partial pressure (O2) within the coating, prompting the formation of a dense Cr2O3 layer on the inner side of the oxide layer. Concurrently, the rapid diffusion of Mn and Cr elements triggers the generation of Mn- and Cr-deficient regions at the metal/oxide layer interface, inducing the transformation of the coated metal primary matrix from an FCC + BCC dual phase to an α-Fe (BCC) single phase. After the reaction, the hot corrosion weight gain of the coating reached 12.43 mg/cm2, approximately one-fourteenth of the weight gain of the 45 steel substrates. This weight gain adheres to the parabolic law, suggesting that the FeMnCrSi/TiC coating exhibits excellent corrosion resistance under the given conditions.

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Section: Cross-sectional Morphology and Phase Analysis Of Coating Aft...mentioning

confidence: 99%

mentioning

confidence: 99%

Insight into the Hot Corrosion Behavior of FeMnCrSi/TiC Coatings at 900 °C

Tang,

Li,

Huang

et al. 2024

Metals

View full text Add to dashboard Cite

show abstract

“…The nickel-based alloys are also in the scope of collected papers. Nickel-based superalloy was investigated under pre-oxidation conditions to verify the influence of the scale formed during the hot corrosion phenomena [ 3 ]. The study [ 4 ] focuses on the corrosion behavior of nickel superalloy coated with Cr 3 C 2 -25NiCr powder through APS and HVOF at 950 °C in environments of air oxidation and molten salt.…”

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confidence: 99%