Corrosion fatigue test apparatus in wet hydrogen sulfide environment, and test method thereof

The invention discloses a corrosion fatigue test apparatus in wet hydrogen sulfide environment, and a test method thereof. The apparatus comprises a fatigue test machine, and also comprises a closed corrosion environment box arranged in the working section of the fatigue test machine and having a corrugated expansion joint, a circulating water system arranged outside the closed corrosion environment box and used for heating a corrosion medium in the closed corrosion environment box, and an online liquid sampling device connected with the closed corrosion environment box and used for measuring and regulating the concentration of the corrosion medium in real time; and a sample in the closed corrosion environment box is clamped by a clamp adapting to the sample, and the clamp traverses through the upper cover board and the lower baseboard of the closed corrosion environment box, and is connected with the fatigue test machine. The apparatus has a simple structure and a good sealing performance, and can be used for carrying out corrosion fatigue performance test of fatigue samples with different shapes and dimensions in the wet hydrogen sulfide environment; and the test method of the apparatus has a temperature control function, can be used for online measurement of the concentration of hydrogen sulfide in a corrosion solution, and improves the accuracy of a test result.