Steel structure anti-corrosion paint spraying coating is a kind of oil-containing or oil-free colloidal solution. When it is applied on the surface of steel structure members, it can form a coating film to prevent the steel structure members from being rusted.
(1) If the number of coating passes and coating thickness are not required by the design, the total dry film thickness of steel structure coating shall be 125 indoor according to the provisions of code for acceptance of construction quality of steel structure engineering (GB 50205-2001) μ m. 150 for outdoor μ m. The allowable deviation is - 25 μ m。 Generally, it should be coated for 4-5 times, and the allowable deviation of the dry film thickness of each layer is 1.5 μ m
(2) Measurement method of film thickness.
1) Observation and inspection: uniform application, complete coating and good adhesion.
2) Instrument measurement: when the dry coating film measuring instrument is used for inspection, it is required to select three measuring points with a distance of 50mm in the measured area to measure the dry coating film thickness, and then take the weighted average value of the coating film thickness (the error is - 25 μ m) As the thickness thereof.
