The phenomenon of transformer failure caused by oil-sulphur corrosion of oil₋paper insulation system has always been concerned by scholars. Irgamet 39 is the most used metal passivator for inhibiting sulphur corrosion. However, Irgamet 39 causes abnormal dissolved gas in oil during the process of exerting anti-corrosion effect. Herein, the gas production mechanism of Irgamet 39 and its long-term corrosion resistance were investigated. Compared with other metal passivators, the Irgamet 39 produces more dissolved gases in oil, especially H₂, CO and CO₂. The main sources of free radicals in the gas production process are from the branched chains of the Irgamet 39 structure (−CH₂N(C₈H₁₇)₂ and −CH₃). Furthermore, the ageing products of insulating paper and oil promote the cleavage of the chain in the Irgamet 39 molecule, which then causes Irgamet 39 to generate more dissolved gases. Irgamet 39 exhibits excellent long-term corrosion inhibition properties,while it also leads to abnormal gases in the oil, which can affect the interpretation of the dissolved gas analysis data and thus interfere with the diagnosis. This work provides useful information for the practical application of Irgamet 39 and helps electrical workers make reasonable predictions for transformer problems.

中文翻译：

---

Irgamet 39的产气机理及其长期耐腐蚀性能

油纸绝缘系统油硫腐蚀引起变压器故障的现象一直受到学者们的关注。Irgamet 39 是最常用的抑制硫腐蚀的金属钝化剂。但Irgamet 39在发挥防腐作用的过程中会导致油中溶解气体异常。在此，研究了 Irgamet 39 的产气机理及其长期耐腐蚀性。与其他金属钝化剂相比，Irgamet 39 在油中产生更多的溶解气体，特别是H ₂、CO 和CO ₂。气体生产过程中自由基的主要来源是Irgamet 39结构的支链（-CH ₂ N(C ₈ H ₁₇ ) ₂和-CH ₃）。此外，绝缘纸和油的老化产物会促进Irgamet 39分子链的断裂，从而导致Irgamet 39产生更多的溶解气体。Irgamet 39表现出优异的长期缓蚀性能，同时它也会导致油中产生异常气体，从而影响溶解气体分析数据的解释，从而干扰诊断。这项工作为Irgamet 39的实际应用提供了有用的信息，并帮助电力工人对变压器问题做出合理的预测。