Abstract: Because of the lack of technical and safety knowledge, some enterprises used corrosive media in their industrial plants, where anticorrosive designs were not cosidered, and caused serious damages to the structures.There were different degrees of damage to the concrete and steel bars of some beams and slabs in a plant, which was appraised as a hydrochloric acid corrosion accident of concrete structure.According to the results of inspection, partial replacement of concrete and replacing reinforcement of the component were used for the corroded components;anticorrosive treatment was also used for the remaining components without damage.