On-line heating-blackening-coating anti-corrosion device

The utility model relates to an on-line heating-blackening-coating anti-corrosion device which comprises a liquid storage box body, a bracket, a precooling device, a two-level sprinkling soaking system and a sealed auxiliary coating system, wherein the bracket is fixed above the liquid storage box body through connecting bars at two ends of the top of the liquid storage box body; the liquid storage box body is divided into a precooling area, a two-level sprinkling soaking area and a sealed auxiliary coating area in the direction of workpiece operation by larger separating walls I and II; and all the devices are correspondingly mounted in the areas in the liquid storage box body. The anti-corrosion device realizes on-line coating production of high-strength twisted steel, is good in workpiece anti-corrosion effect, can meet anti-corrosion requirements of different levels, and can perform workpiece self-repairing. The anti-corrosion device has the characteristics of low technology cost, shortened production per