2, the performance of polyester paint: light color, transparent, full bright film, high hardness, corrosion resistance, moisture resistance, solvent resistance, wear resistance, light preservation, good color retention, and has a certain heat resistance and temperature change,

3, acrylic resin paint performance: light color, good heat resistance, fast drying, corrosion resistance, bright film, hard, good adhesion.

The surface of the wrought iron can be painted, painted or painted. Because the workpiece is too large, it is not convenient to paint and is not suitable for maintenance in the later period of installation, so painting and spray painting are the most common basic methods in paint construction. A brief description is as follows:

(1) Painting: Paint is painted on the surface of the object with a manual brush. It is characterized by saving paint, simple installation of tools, convenient application, easy to master, and strong flexibility. The disadvantages are: high labor intensity and low productivity. For the applicability of fast drying paint is poor, if the operation is not skilled, the paint film is easy to produce cracks, flow and uneven defects.

Before painting, the paint must be stirred evenly (to prevent pigment precipitation during storage), and adjusted to the appropriate viscosity, generally judged by experience: After dipping the paint with a brush, the natural flow of 30-50 drops per minute is appropriate. Brush less and more, from top to bottom, from left to right, first inside after outside, first oblique after straight, first difficult after easy, horizontal and horizontal brushing. The last brush should also pay attention to: for the vertical surface should be carried out from the top down; For horizontal surfaces, it should be carried out in the direction of light exposure.

(2) Spray painting with a special spray gun as a tool, with compressed air as the paint flow, the paint is sprayed from the spray nozzle of the spray gun into a uniform mist liquid, which is uniformly dispersed and deposited on the surface of the object. The characteristics of spray painting are: thin and uniform paint film, smooth and flat, all parts can be sprayed, no dead corners, high construction efficiency, 5-10 times higher than paint, suitable for large areas of the surface and artificial not easy to paint the dead corner deformed surface. The disadvantages are: special equipment for painting is required, the paint utilization rate is low, and pollution is serious. The quality of painting construction mainly depends on the technical proficiency of the operator, the viscosity of the paint, the working air pressure, the distance between the spray gun and the object.

The viscosity of the paint used in painting should be flexibly mastered according to the type of paint, working air pressure and ambient temperature. Generally, it should be controlled at 15-35 drops per minute; The working air pressure is 3-6kg/cm2; The distance between the spray gun and the surface of the object is generally about 250-400mm; The direction of the spray paint flow should be as vertical as possible to the surface of the object at about 10-12 meters/minute uniform speed gun is good.