Corrosion Resistance of Tetrafluoroethylene-Propylene Rubber in H₂S/CO₂ Acidic Environment

High temperature and high pressure immersion corrosion test was employed to age tetrafluoroethylene-propylene rubber (TFEP) in acidic environment containing H₂S and CO₂. And the effects of temperature, content of H₂S and CO₂, and environmental pressure on the corrosion resistance of TFEP were investigated. The results show that the most important effect factor was the temperature of corrosive environment, while the content of H₂S, CO₂ and environmental pressure had little effects on the material properties. The mechanical properties decreased with the increase of temperature, and the strength retention rate was greater than 69%. The TFEP had good corrosion resistance to H₂S and CO₂, which was equal to that of perflouroelastomer rubber in the acidic environment of 150℃, 1.0 MPa partial pressure of H₂S, 1.5 MPa partial pressure of CO₂, and the sealing capacity of the packer made of TFEP reached 50 MPa.