The active sulphur compounds in transformer oil would react with copper wires and produce cuprous sulphides, which then attach themselves to the surface of copper wires and insulating paper, thus reducing the electrical performance of oil–paper insulation and causing insulation failure. This article aims to make a comprehensive summary on the field of sulphur corrosion of oil–paper insulation in the mineral oil transformer, including the corrosion mechanism of sulphide on copper sheets, the deterioration mechanism of sulphide on oil–paper, the factors influencing sulphur corrosion reaction, the method of characterising the degree of sulphur corrosion, the protection technology of sulphur corrosion and the field operation measures for sulphur corrosion. Moreover, four key problems that need to be further solved were sorted out: the synergistic deterioration mechanism of sulphide and its transformation mechanism, the micro-process and forming path of sulphur corrosion reaction, the characteristic parameters and quantitative characterisation methods of sulphur corrosion degree, and the effective protection technology of sulphide corrosion. To solve these problems, efforts will be made for deeper understanding of the sulphur corrosion phenomenon and its deterioration mechanism based on theoretical background, the assessment methods and protection technology, endeavouring to put forward solid theoretical basis and feasible technical means for preventing sulphur corrosion insulation failure.

变压器油中的活性硫化合物会与铜线反应并生成硫化亚铜，然后将其附着在铜线和绝缘纸的表面，从而降低油纸绝缘的电气性能并导致绝缘故障。本文旨在对矿物油变压器油纸绝缘体的硫腐蚀领域进行全面综述，包括铜片上硫化物的腐蚀机理，油纸上硫化物的劣化机理，影响硫腐蚀的因素。反应，表征硫腐蚀程度的方法，硫腐蚀的防护技术以及硫腐蚀的现场操作措施。此外，还提出了四个需要进一步解决的关键问题：硫化物的协同劣化机理及其转化机理，硫腐蚀反应的微观过程和形成途径，硫腐蚀程度的特征参数和定量表征方法以及硫化物腐蚀的有效防护技术。为解决这些问题，将在理论背景，评估方法和防护技术的基础上，加深对硫腐蚀现象及其恶化机理的认识，为防止硫腐蚀绝缘失效提供坚实的理论基础和可行的技术手段。 。硫腐蚀程度的特征参数和定量表征方法，以及硫化物腐蚀的有效防护技术。为解决这些问题，将在理论背景，评估方法和防护技术的基础上，加深对硫腐蚀现象及其恶化机理的认识，为防止硫腐蚀绝缘失效提供坚实的理论基础和可行的技术手段。 。硫腐蚀程度的特征参数和定量表征方法，以及硫化物腐蚀的有效防护技术。为解决这些问题，将在理论背景，评估方法和防护技术的基础上，加深对硫腐蚀现象及其恶化机理的认识，为防止硫腐蚀绝缘失效提供坚实的理论基础和可行的技术手段。 。