1. Pickling method (applicable to the base surface with more oil stain): Clean the oil stain on the surface of the steel structure with metal rust remover, then rinse with water and brush with brush. This method can remove more oil stains.

2. Mechanical method: the sanding machine, the slag, the dust, the oil and other substances remaining on the surface of the steel structure are removed by a grinding machine, so that the coating can be firmly attached to the surface of the workpiece before painting. It is necessary to clean the surface of the workpiece. Otherwise, it will not only affect the bonding strength and corrosion resistance of the coating with the base metal, but also cause the base metal to continue to corrode even under the protection of the coating, causing the coating to peel off and affect the steel. Mechanical properties and service life of the structure. Therefore, the surface treatment before the construction of the steel structure is an important guarantee and measure for obtaining a good quality protective layer and prolonging the service life of the steel structure.

FRP anti-corrosion operation conditions

1. When the humidity is too large, add a dehumidifier. When the temperature is too low, the temperature rise measures should be adopted.

2. Before the construction of FRP, the quality of the previous process should be checked strictly according to the design requirements, and the construction record should be completed.

3. The surface of the concrete base layer is required to be firm, dense and flat, and there is no unqualified phenomenon such as cracking of the shell.

4. The raw materials are transported to the working place by means of pipelines, and the construction site is prepared with a fixed capacity batching appliance.