Preparation device of intercrystalline corrosion sample of inner cladding layer of metallurgical composite pipe

The utility model discloses a preparation device of an intercrystalline corrosion sample of an inner cladding layer of a metallurgical composite pipe. The preparation device comprises a container, a cover board, an air source, a pressure regulating control device, a heating device and a power supply for providing electrical energy, wherein the cover board is hermetically connected with an opening at the upper part of the container, the air source is connected with the inlet of the pressure regulating control device by a pipeline, the outlet of the pressure regulating control device is communicated with the interior of the container, the heating device comprises a controller and a heating wire, the controller is fixed outside the container, the heating wire is positioned in the container, and the power supply is connected with the heating wire by a controller. According to the preparation device, metal in a fusion zone of the inner cladding layer is not required to be thinned, the preparation speed is high, and the prepared intercrystalline corrosion sample of the inner cladding layer of the metallurgical composite pipe can achieve accurate and reliable result when applied to intercrystalline corrosion.