Abstract: To investigate the corrosion protection effect of TW-7(A) coating on 1Cr16Co5Ni2MoWVNbN high-pressure compressor blades in the marine atmospheric environment, this study conducted accelerated corrosion tests simulating the shipboard parking environment and room-temperature vibration fatigue tests before and after corrosion on two types of test pieces: 1Cr16Co5Ni2MoWVNbN bare blades (hereinafter referred to as 1Cr16Co bare blades) and 1Cr16Co5Ni2MoWVNbN + TW-7(A) coated blades (hereinafter referred to as 1Cr16Co+TW-7(A) coated blades). The results show that after the accelerated corrosion test simulating the shipboard parking environment, obvious corrosion phenomena occurred on the surface and tenon position of the 1Cr16Co bare blades, showing weak corrosion resistance in the marine environment, while the matrix of the 1Cr16Co+TW-7(A) coated blades did not corrode, only slight corrosion damage occurred on the coating. The fatigue strength limit of the 1Cr16Co+TW-7(A) coated blades before corrosion reached 754.3 MPa, which was 11.5% higher than that of the 1Cr16Co bare blades; the fatigue strength limit of the coated blades was 715.8 MPa after corrosion, which was 5.1% lower than that before corrosion, but still met the design requirement (not less than 480 MPa). The TW-7(A) coating effectively protected the blade matrix through its own corrosion consumption during the corrosion process, and had excellent corrosion protection performance, which could provide reliable corrosion protection for the service of 1Cr16Co5Ni2MoWVNbN high-pressure compressor blades in the marine atmospheric environment.