High-temperature oxidation and hot corrosion behavior of Er2Sn2O7 + Inconel 625 composite

Babu, Mukiri Soban; Kiruba, M.; Dharuman, N.; Sundaravignesh, S.; Sankarapandian, S.; Palled, Vijayakumar; Berchmans, L. John; Sreedhar, Gosipathala

doi:10.1016/j.ceramint.2019.05.327

Cited by 5 publications

(3 citation statements)

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“…[ 23 ] The typical peaks of the IN625 overlay samples subjected to the hot corrosion study correspond to chromium oxide (Cr 2 O 3 ), a spinel phase (NiCr 2 O 4 ) and nickel oxide (NiO). [ 43 ] Minor peaks were observed for the Fe 2 O 3 , FeVO 4 , CrVO 4 , and Ni 3 V 2 O 8 phases. Similar peaks were noticed in the previous literature.…”

Section: Resultsmentioning

confidence: 99%

“…The IN625 overlay samples contain the delicate clusters along the surface of the corroded sample, indicating the NiO phase. [ 43 ] Nickel oxide content is less in the hot corroded samples than in the hot oxidized samples.…”

Section: Resultsmentioning

confidence: 99%

“…A lesser k value indicates a higher corrosion resistance. [42][43][44][45] This means that the IN625 overlay has provided excellent resistance to corrosion at elevated conditions when deposited on the stainlesssteel substrate.…”

Section: Hot Corrosion Kineticsmentioning

confidence: 99%

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High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate

Nachimuthu,

Gosipathala,

Arasappan

et al. 2024

Materials & Corrosion

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In elevated conditions, austenitic stainless steels suffer intense damage by corrosion because of the severe oxide scale development. Giving stainless steel a corrosion‐resistant surface coating can prevent excessive damage. In this case, welding‐based overlaying is a potential method to restore the damaged parts as it has a higher productivity rate. This investigation articulates the corrosion resistance behavior of the multiple overlapped Inconel 625 (IN625) weld overlays on the AISI 316L substrate plate. The corrosion resistance at elevated temperatures was investigated with kinetic curves, further revealing the corrosion products from the sample surface. Characterization techniques like scanning electron microscopy with energy‐dispersive spectroscopy, X‐ray diffraction, and Raman spectroscopy were employed to analyze the corrosion products. Hot corrosion kinetics in the molten salt environment (Na2SO4 + V2O5) revealed that the IN625 overlay samples gained a weight of 40.15 mg/cm2, and the substrate had a weight gain of 65.42 mg/cm2. From the hot oxidation kinetics, it is evident that the mass gained by the substrate is more than twice that of the Inconel overlay sample. Furthermore, the formation of oxides and spinel phases rich in nickel (NiO, NiCr2O4) highly influenced the corrosion kinetics of the multiple overlapped IN625 overlay sample. The AISI 316L substrate sample revealed the existence of critical oxide phases such as Fe2O3 and Cr2O3, which were lesser and did not influence the corrosion resistance at 900°C. In the present investigation, the multiple overlapped IN625 weld overlay offered excellent corrosion resistance at high temperature compared to the AISI 316L.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%