Study of Corrosion Performance and Mechanisms of P91, 304SS and IN625 Alloys in Molten Nitrate Salts Used for Thermal Energy Storage System

The corrosion performance of P91, 304SS and IN625 alloys was evaluated in simulated Solar Salt at 565 °C for up to 15 days. Results revealed that IN625 exhibited the best corrosion resistance with the evolution of thin and compact dual-structured oxide scales. 304SS experienced a great corrosion rat...

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Veröffentlicht in:	Metals (Basel ) 2023-04, Vol.13 (4), p.806
Hauptverfasser:	Li, Ning, Tariq, Naeem ul Haq, Han, Botao, He, Rui, Wang, Jiqiang, Cui, Xinyu, Xiong, Tianying
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Alternative energy sources Carbon concentrated solar power Corrosion corrosion mechanism Corrosion mechanisms Corrosion rate Corrosion resistance Corrosion tests Discount coupons Energy storage Force and energy Heat Heat storage molten nitrate salt Nickel base alloys Nitrates performance evolution Renewable resources Scale (corrosion) Specialty metals industry Stainless steel Steel Superalloys Temperature Thermal energy thermal energy storage
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Zusammenfassung:	The corrosion performance of P91, 304SS and IN625 alloys was evaluated in simulated Solar Salt at 565 °C for up to 15 days. Results revealed that IN625 exhibited the best corrosion resistance with the evolution of thin and compact dual-structured oxide scales. 304SS experienced a great corrosion rate at the initial stage, but showed protective behavior in the later period. A linear mass gain rate was observed for P91, which may result in breakaway corrosion during prolonged immersion time. Finally, the underlying corrosion mechanisms were revealed, providing important guidelines for selecting applicable materials for corrosion mitigation in thermal energy storage (TES) system.
ISSN:	2075-4701 2075-4701
DOI:	10.3390/met13040806