1. Coating method and brushing process should be based on the physical properties of the selected coating, construction conditions and the shape of the steel structure to be painted and should be consistent with the coating specifications or product specifications.
2. Painting should be carried out before the appearance of steel surface inspection to ensure that the steel surface cleanliness and surface roughness to meet the design requirements.
3. The interval between surface pretreatment and coating should be shortened as much as possible. In general, the coating should be finished within 4 hours under the environment of the working site; the sunny day of the workshop operation or low humidity should not exceed 12 hour.
4 When the temperature of the painted steel structure surface is lower than 3 ℃ above the dew point or the relative humidity of air is more than 85%, the construction work should be stopped unless otherwise specified in the design.
5. To be welded in the construction site of the steel structure, the weld on both sides of the first brush should not affect the performance of the shop primer welding, welding heat affected area should be carried out after the secondary surface cleaning, according to design requirements to re-coating.
6. Coating should be carefully maintained after the coating, should be avoided before curing rain, exposure and trampling, lifting the handling process should take appropriate measures to minimize the damage to the coating.
7. Coating interval between the layers should be consistent with the product specification or specification requirements, such as more than the longest interval of time, the application of coarse abrasive cloth and then brushing the next brushing coating to ensure coating Between the binding force.
