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The C5F10O gas mixture has great application prospects as a potential SF6 substitute gas. It is necessary to study the compatibility of the C5F10O gas mixture with copper and aluminum used in the electrical insulation equipment before the engineering application. In this paper, we studied the interaction of C5F10O/CO2 with copper and aluminum at various temperatures experimentally. The results show that the compatibility of copper with the C5F10O/CO2 gas mixture is obviously inferior to that of aluminum. Considering the temperature rise effect during normal operation of the equipment, it is found that the interaction between C5F10O/CO2 gas mixture and copper at 80 °C will lead to slight corrosion on the copper surface. The corrosion degree increased at the higher temperature. SEM shows that massive cubic grains will be formed on the copper surface at 150 °C–250 °C. No corrosion was observed on the aluminum surface at 150 °C ~ 250 °C, which is related to the protective effect of the oxide layer Al2O3 on the aluminum. The relevant results reveal the compatibility of the C5F10O/CO2 gas mixture with metal materials and provide an important reference for the engineering application of the C5F10O gas mixture.

Experimental Study on Compatibility of Eco-Friendly Insulating Medium C5F10O/CO2 Gas Mixture With Copper and Aluminum

Experimental Study on Compatibility of Eco-Friendly Insulating Medium C₅F₁₀O/CO₂ Gas Mixture With Copper and Aluminum