Experiment device for research on corrosion behavior of metal substrate beneath peeling coating

The invention discloses an experiment device for research on the corrosion behavior of a metal substrate beneath a peeling coating. The experiment device comprises an epoxy resin plate, an organic glass plate, a plurality of work electrode, at least one auxiliary anode, a plurality of reference electrodes, a plurality of needle tubes, a plurality of lead wires, a plurality of bolts, a steel pipe, gaskets, a voltmeter, a constant potential rectifier, an electrochemical tester, and a stray current source. In the provided equipment, the organic glass plate and epoxy resin plate are used to simulate the medium environment beneath a peeling coating, wherein a gap exists between the organic glass plate and the epoxy resin plate, and the gap thickness can be controlled by adjusting the number of gaskets; multiple work electrodes are arranged on the damaged parts and different positions beneath the peeling coating to simulate the metal substrates on the damage parts and positions beneath the peeling coating. Only one experiment device can carry out many indoor experiments on the corrosion behavior of metal substrate under factors of stray currents, gap thickness, and cathode protection potential, and the like.