1. Before the coating construction, the free edge of the rod should be reversed on both sides, and the radius of the reversed arc should not be less than 2.0mm.
Inspection method: observation inspection.
2. The cleanliness and roughness of the rod surface before painting should meet the design requirements. Inspection method: surface cleanliness shall be inspected by comparison of graphs, and surface roughness shall be inspected by roughness comparison sample or roughness measuring instrument.
3. Variety of coatings. The construction environment and coating thickness of each coating should meet the design requirements and the specifications of the coating products used.
Inspection method: check the construction environment with a temperature and humidity meter or shaker, dew point meter, etc. Check the dry film thickness of the coating with a magnetic Thickness Gauge. Take the steel beam member as the - - measurement unit, and take 10 m as the - - measurement unit on the surface of the extra-large member. For each measurement unit, at least three reference surfaces should be selected, and each reference surface should be measured at five points, whichever is the best. Arithmetic mean.
(Arbitrarily select three 10 m' rods below 100 m' for measurement, and measure the first 100 m2 of rods over 100 m' according to the above method, and for each of the remaining 100 m2, randomly select a 10 m Measure.) The thickness of a single test point shall not be less than 80% of the specified thickness.
4. The adhesion of the entire coating to the substrate and the interlayer adhesion shall be tested by the cross-cut method according to the provisions of test results shall not be lower than level 1; or the pull-off test shall be carried out according to the provisions of CB/T5210. The result should not be lower than 3 MPa.
Inorganic zinc-rich anti-rust and anti-slip coating. The adhesion is tested by the pull-off method, and the test result should not be lower than 4 MPa.
The adhesion of the epoxy zinc-rich primer coating to the substrate is tested by the pull-off method, and the test result should not be lower than s MPa.
The adhesion test of the aluminum coating to the substrate shall be cross-cut inspection After the inspection, the coating in the square shall not be peeled off from the substrate; when the pull-off method is used for inspection, it shall not be lower than 5.9MPa .
5. The color of the rod paint film should meet the requirements of the Color Chart specified by the owner, and the surface of the coating material coating should be smooth and uniform without obvious color difference. Defects such as peeling, blistering, cracks, pores, and leaks are not allowed. Slight orange peel, sagging, brush marks and a small amount ; the surface of the metal coating should be uniform and consistent, and no Defects such as peeling, bubbling, large molten droplets, loose particles, cracks, and falling blocks.
Inspection method: observation inspection.
6. After the painting is completed, the identification of the rod. Numbering should be clear and complete.
Inspection method: observation inspection.
