Patent ID: 11939681
Assignee: SOUTHWEST PETROLEUM UNIVERSITY
Field: Surface technology, coating (Chemistry)
Classification: CPC C  Y | IPC C

Claim 2:
3. The plant composite corrosion inhibitor for the oil field according to claim 1, wherein preparation steps of the second plant ingredient specifically comprise: washing, disinfecting, drying and crushing fresh luffa leaves, guava leaves and eclipta according to a mass ratio of 5:8:9, adding anhydrous ethanol according to a liquid-material ratio of 13 mL/g, soaking the mixture for 36 hours, carrying out normal temperature ultrasonic treatment on the soaked mixture by an ultrasonic cleaner for 30 minutes, then removing an insoluble substance by depressurized suction filtration, and concentrating the solution to ⅓ volume through rotary evaporation at 80° C. by a rotary evaporator to obtain the second plant ingredient.