Sulphur corrosion in transformer insulating oils: Its effects, detection methods, and mitigation strategies

Ab Ghani, Sharin and Zulkefli, Nur Izyan Husnina and Ahmad Khiar, Mohd Shahril and Sutan Chairul, Imran and Rahim, Nor Hidayah and Mohd Azlan, Nur Farhana (2025) Sulphur corrosion in transformer insulating oils: Its effects, detection methods, and mitigation strategies. International Journal of Advances in Applied Sciences (IJAAS), 14 (3). pp. 784-792. ISSN 2252-8814

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Abstract

Oil-immersed transformers are subjected to electrical, thermal, and mechanical stresses over time, which inevitably affect the insulating oil and paper insulation. The presence of sulphur corrosion also degrades the insulating oil and paper insulation. Sulphur corrosion in insulating oils has beena prevalent problem for many years, as it culminates in the failure of oil-immersed transformers. The longevity of oil-immersed transformers is dependent on the integrity of the insulating oil and paper insulation, which can deteriorate owing to sulphur corrosion. The occurrence and accumulation of copper sulphide (Cu2S) can result in transformer malfunctions, which is a significant issue for transformer manufacturers and operators. This paper provides a concise overview of the effects of sulphur corrosion, its detection methods, as well as its mitigation strategies. It is believed that this paper will enhance the understanding of sulphur corrosion in insulating oils, provide the best practices for sulphur corrosionmanagement, and serve as guidance on enhancing transformer reliability and performance.

Item Type:	Article
Uncontrolled Keywords:	Additives, Antioxidants, Elemental sulphur, Metal passivators, Sulphur corrosion, Transformer insulating oil
Divisions:	Faculty Of Electrical Technology And Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	23 Feb 2026 04:33
Last Modified:	23 Feb 2026 04:33
URI:	http://eprints.utem.edu.my/id/eprint/29550
Statistic Details:	View Download Statistic

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