Abstract: Explosive cladded 304 L/plain carbon steel plates have been popular for engineering applications due to its good corrosion resistance. Here, a kind of 304 L/plain carbon steel plate is prepared by explosive welding. The intergranular corrosion, pitting corrosion and crevice corrosion behavior of the explosive cladding plates are investigated by using potentiodynamic techniques, circular polarization and potentiostatic method, combined with optical microscope and scanning electron microscope. The results show that the explosive cladding process can cause the precipitation of some second phases in the grain boundary of 304 L stainless steel, which leads to the decrease of its local corrosion resistance.