Robust Superamphiphobic Coating Applied to Grease-Proof Mining Transformer Components

The iron core and heat sink in a mining transformer aresusceptibleto damage from oil spills or the harsh mine environment; the deteriorationof oil products in the underground environment and transformers producemassive amounts of harmful liquid substances, which may lead to unnecessaryeconomic losses in drilling engineering. To overcome this issue, aconvenient and economical way to protect transformer components wasdeveloped. Herein, we proposed an air spray technology at room temperaturefor the preparation of antigreasy superamphiphobic coatings, whichare suitable for bulk metallic glass transformer cores and ST13 heatsinks. The addition of polypyrrole powder effectively improves thethermal conductivity and specific heat of the coating in the rangeof 50-70 degrees C. More importantly, the fabricated coatinghas excellent repellency to liquids, such as water, ethylene glycerol,hexadecane, and rapeseed oil. Meanwhile, the coating has excellentphysical and chemical resistance and outstanding antifouling features,which provide a feasible solution for combating grease pollution andcorrosion in the mine environment. Taking multifaceted stability intoconsideration, this work contributes to enhancing the applicationof superamphiphobic coatings in the fields of protecting transformercomponents in the harsh environment or during transformer operationfaults.

Automated summary

In order to protect the iron core and heat sink of a mining transformer from damage caused by oil spills or the harsh mine environment, an air spray technology at room temperature was proposed to prepare antigreasy superamphiphobic coatings. These coatings have excellent repellency to liquids, physical and chemical resistance, and outstanding antifouling features, providing a feasible solution for protecting transformer components in the harsh environment.