Variable-flow-velocity concrete corrosion test device adopting multiple erosion media

The invention discloses a variable-flow-velocity concrete corrosion test device adopting multiple erosion media. The variable-flow-velocity concrete corrosion test device comprises a frame, a medium box, a plurality of test sample tubes, a drive motor, a plunger pump and a buffer tank, wherein the frame comprises two layers; the test sample tubes are fixed on an upper-layer platform of the frame; the medium box, the drive motor, the plunger pump and the buffer tank are fixed on a lower-layer platform of the frame; the drive motor is used for driving the plunger pump which drives the erosion media in the medium box to circulate; the medium box, the plunger pump and the buffer tank are connected through a pipeline; a branch pipe is arranged on the pipeline between the plunger pump and the buffer tank to shunt surplus media back to the medium box; a plurality of water outlet ports are formed in the buffer tank, a water inlet and a water outlet are formed in each test sample tube, the water inlets are in one-to-one correspondence with the water outlet ports in the buffer tank, and the water outlets in the test sample tubes are communicated with the medium box through a pipe. According to the variable-flow-velocity concrete corrosion test device, appropriate erosion acceleration media and medium circulating speed are selected according to characteristics of a corrosion environment for development of a concrete corrosion accelerated test.