The invention was not an abrasive or fugitive dust generated by removing the paint using the paint removal device using a high frequency induction heating environment-friendly as possible to the surface treatment, drying nature after the touch dry using a portable far-infrared dryer heating and shortening the drying time is within the present invention relates to overcoating repair method of the steel structure that can be improved in quality to a uniform heating of the outside.
The present invention comprises a step 1 of removing the rust and paint peeling on the surface of the steel structure using a removal device using a high frequency induction heating; Step 2 to primer coating by applying the rust preventive and a primer to form a first surface layer; Third step of the first surface dried using a far infrared ray drying apparatus; 4 step of drying after the step 3 in a natural state; After the step 45 comprising: applying an intermediate coating to environment-friendly ceramic material; 6 comprising a second coating layer formed by said middle seal dried using a far infrared ray drying apparatus; 7 comprising the step 6 after drying in the natural state; After the step 78 comprising: coating a top coat paint friendly antifouling agents; 9 comprising a third coating layer formed by the topcoat dried using a far infrared ray drying apparatus; 9 after the step is configured to include a step 10 for drying in the natural state.