First, prepare before painting

1, before painting should check all the paint varieties, models, specifications are in line with the provisions of the construction technical conditions. Quality unqualified or deteriorated paint can not be used.

2, before painting the basic composition and performance of the paint and the construction method to understand, according to the paint their own construction requirements to determine the appropriate coating tool.

3, due to the proportion of various components in the paint, the general paint after storage, there will be a different degree of precipitation. Therefore, the paint must be stirred until it is completely uniform before painting. If you find patent leather or particles, you should use 80 ~ 120 mesh screen filter.

4, workshop primer, epoxy asphalt anti-rust paint, 841 epoxy polyamide food container wall paint, 846 epoxy asphalt thick slurry anti-rust paint and polyurethane finish are A, B two components of the two cans Installed paint. Before use must be mixed according to the provisions of the weight ratio, if the mixing ratio is wrong, will affect the drying performance and anti-rust performance.

Epoxy asphalt thick paste and polyurethane paint is cross-linked curing type, A, B two parts after mixing to be used for 30 minutes before use, at 20 ℃ for 12-20 hours after the gradual gelation until it can not be used The Therefore, the coating area should be calculated using the final mixing.

5, the general paint at the factory has been adjusted to the appropriate viscosity of the construction, is not necessary to dilute the treatment. But the temperature is too high or too low conditions, you can also add the right amount of thinner to achieve the desired coating viscosity, but the amount of diluent should generally not exceed the weight of the paint itself 5%.

Second, the coating precautions

1, brushing

Painted with paint brush, brush the direction of the first should be left and right after the left and right to paint, paint brush dipped paint can not be too much to prevent dripping. When the coating is heavily protected, the paint brush distance can not be pulled too much to prevent the film from being thin. In case of rough surface, edge, bay angle and protruding and other parts should pay special attention to the best pre-coated with a.

2, roller coating

When painted with a roller, the paint on the drum should be evenly distributed. Painting speed to keep a certain, not too fast. Avoid excessive pressure roller. For welding, cutting and other protruding parts, especially careful handling, it is best to pre-coated.

3, high pressure airless spray

This is the fastest coating method, and can get a very thick paint. Therefore, in order to achieve the provisions of the film thickness, it is best to use airless spray construction methods. In the actual coating should be used first up and down around, or first left and right after the vertical and horizontal spray method. The use of airless spray requires a higher skill, the gun and the painted surface should be maintained at a horizontal distance, the operation to prevent the gun to do long distance or arc waving.

4, the film thickness control

Each of the film thicknesses listed in this note refers to the film thickness of airless high pressure spray

In order to make the anti-corrosion coating to its best performance, adequate film thickness is extremely important. Therefore, it must be strictly difficult to fix the thickness of the paint film.

The thickness of each film obtained by painting with a paint brush or roller is at least twice as high as that of a high-pressure airless sprayed coating to achieve the specified thickness.

Construction should be used according to the amount of coating, often using the film thickness measurement of wet film thickness to control the thickness of the dry film and ensure uniform coating thickness.

Determine the density and distribution of the thickness measurement points according to the size of the object to be coated, and then measure the dry film thickness. If the thickness of the film does not meet the requirements, it must be filled.

5, different types of paint intervals are different, in the construction should be based on each of the paint to be the construction. Especially to look at the emphasis on the epoxy asphalt thick slurry antirust paint, yellow lacquer finish, the coating interval can not exceed the longest interval in the description, or will affect the film between the film and the Efforts to cause the film peeling off.