Hot corrosion phenomena of Nb-Ti-Si based alloy and its silicide coating induced by different corrosive environments at 900 °C

Qiao, Yanqiang; Kong, Jianping; Guo, Xiping

doi:10.1016/j.ceramint.2018.01.238

Cited by 31 publications

(5 citation statements)

References 66 publications

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“…The p O2 at the oxide scale/substrate interface decreased after internal oxidation of Al leading to the enhancement of the sulphur activity. As a result, the most stable sulphide compound, TiS, formed in the substrate [20]. TiS formation continues with the continuation of sulphur transfer from NiO and Cr 2 O 3 layers to the substrate surface downwardly until the conditions for CrS phase formation was provided [39,45].…”

Section: Resultsmentioning

confidence: 99%

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The evaluation of oxide scale formation during hot corrosion of Rene-80 superalloy under thermal shock at different dwell times

Rabieifar

Afshar

Najafi

et al. 2021

Corrosion Engineering, Science and Technology

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In this study, the oxide scale formation on the Rene-80 superalloy after hot corrosion under thermal shock has been investigated. The X-ray diffraction (XRD) and field-emission scanning electron microscope (FE-SEM) were used for the phase identification and evaluation of oxide scale, respectively. The hot corrosion test under thermal shock was performed by depositing Na 2 SO 4 salt at the beginning of each cycle on the surface of the specimens. The results showed that hot corrosion occurred intermittently with the basic fluxing mechanism of the oxide scale and reprecipitation of discontinuous and porous oxides. The growth rate of the Cr 2 O 3 layer increased with decreasing the dwell time per cycle and the dissolution of titanium. Decreasing the dwell time in each hot corrosion cycle increased the growth rate of the Cr 2 O 3 layer, the chromium depletion from the substrate/oxide scale interface, the internal oxidation of aluminium, and the internal sulfidation of chromium.

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Section: Resultsmentioning

confidence: 99%

“…During combustion, sulphur in the fuel converts to SO 2 and SO 3 gases. With the reaction between NaCl vapour and SO 2 /SO 3 gases, Na 2 SO 4 produces [19,20]. Na 2 SO 4 has the basic component of Na 2 O and the acidic component of SO 3 [20,21].…”

Section: Introductionmentioning

confidence: 99%

The evaluation of oxide scale formation during hot corrosion of Rene-80 superalloy under thermal shock at different dwell times

Rabieifar

Afshar

Najafi

et al. 2021

Corrosion Engineering, Science and Technology

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“…According to Qiao et al [38], Nb-Si-Ti alloy and its silicide covering were subjected to a heated corrosion process that was exacerbated by NaCl.…”

Section: Research Progress In Hot Corrosionmentioning

confidence: 99%

Behaviour of thermally sprayed coating for hot corrosion applications

Alam,

Kumar,

Das

2024

J. Electrochem. Sci. Eng.

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As modern air engines’ working temperatures are increasing, materials and coatings' hot corrosion resistance characteristics gain significant attention. Hot corrosion is a type of degradation at high temperatures that involves oxidizing or sulphidation of the substrate behind a layer of salt melt deposit, which either causes the development of a thick layer of sulphide scale or the penetration of sulphur via grain boundaries into the matrix to a deeper depth. It may notably change the microstructure, phase composition, and characteristics of the thermally sprayed coating. In recent years, thermally sprayed cermet coatings on steel have been more well-liked as a possible method for enhancing hot corrosion resistance. This review paper qualitatively summarizes the recent development of thermal sprayed coatings to improve hot corrosion performance.

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“…It is generally thought that the hot corrosion in the presence of NaCl salt is initiated by oxychlorination reaction, as described in Eq. (1) [22]: yM + z/2O2(g) + xNaCl = NaxMyOz + x/2Cl2(g) (M= Co, Cr, Fe, etc. )…”

Section: Fig 2 Xrd Patterns Of the Hot Corroded Cocrfenial Hea Inmentioning

confidence: 99%

Toz metalurjisi ile üretilen CoCrFeNiAl YEA'nın NaCl erimiş tuz içindeki sıcak korozyon davranışı

Garip¹

2022

Politeknik Dergisi

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Hot corrosion phenomena of Nb-Ti-Si based alloy and its silicide coating induced by different corrosive environments at 900 °C

Cited by 31 publications

References 66 publications

The evaluation of oxide scale formation during hot corrosion of Rene-80 superalloy under thermal shock at different dwell times

The evaluation of oxide scale formation during hot corrosion of Rene-80 superalloy under thermal shock at different dwell times

Behaviour of thermally sprayed coating for hot corrosion applications

Toz metalurjisi ile üretilen CoCrFeNiAl YEA'nın NaCl erimiş tuz içindeki sıcak korozyon davranışı

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