Several Misunderstandings In The Anti-corrosion Coating Of Teflon Spraying

1. Focus on anti-corrosion coatings, scorn the surface treatment:

Pre-treatment of the surface of the substrate before anti-corrosion coating of metal or non-metal materials is a very important part of anti-corrosion coating. If the surface is improperly treated, it will directly affect the adhesion of the coating to the substrate, and the coating. Quality and protection of the substrate, coating life, coating appearance, etc., analysis shows that the quality of the surface treatment is the main factor affecting the quality of the coating.

2. Pay attention to the selection of materials, contempt for anti-corrosion support:

Due to the different properties of anti-corrosion coatings, different choices should be made under different environmental media, characteristics of coated materials, construction conditions and anti-corrosion design years. Therefore, it is not possible to simply evaluate the “good” and “bad” of anti-corrosion coatings. Use it as a system to choose anti-corrosion coatings, that is, compatibility.

3. Pay attention to the unit price of materials and despise the comprehensive cost:

Some users often only pay attention to the unit price of materials, do not calculate the comprehensive cost, choose low-cost anti-corrosion coatings produced by small factories, poor quality, low solid content, low coating area, and low total cost. Such phenomena are extremely common.

4. Focus on short-term investment and despise long-term expenses:

When the anti-corrosion coating system is selected, technical and economic comparison should be carried out, different anti-corrosion life settings should be adopted for different projects, and the system with too short life should be avoided. These systems seem to have small initial investment, but the maintenance cost is high, due to The complexity of maintenance, many projects in the cost of subsequent maintenance is even higher than the initial investment.

Elements in the painting process

1. The surface of the object to be coated is unclean. When the oil removal process before the coating is unclean, the oil is left on the surface of the object with rough or pinholes. After the phosphating, the oil remains in the object. On the top, the formed coating is prone to shrinkage and has been treated to be clean and complete.

2. The surface of the object to be coated is not flat, and the surface of the object to be coated such as cast iron, aluminum and hot-rolled steel plate is not flat, and there are pores. During the coating process, the melt flow of the paint is normal, and the air in the air hole is swollen by heat. The film that is solidifying is bulged, and the shrinkage hole is formed if the film cannot be leveled.

Treatment method: preheating and coating the coated object to prevent the air from swelling and rupturing the coating film; participating in the defoaming agent in the coating, which can reduce the surface tension of the coating during the melt leveling process, so that The air in the pores of the coating escapes in time and the coating film heals quickly.

3. The surface of the coated object after the external treatment is left with water, and the coated material with residual moisture is condensed when the water is evaporated after baking. Therefore, it is necessary to adjust the water after washing. The drying temperature and timing allow the air in the pores of the object to be escaping in time and the coating film to heal quickly.

4. When replacing the type of paint, the equipment is not completely cleaned, forming new and old paints that are turbid and disturbing each other, which tends to cause shrinkage of the coating. Therefore, when replacing the type of paint, the spray gun, the powder supply tank, the powder feeding pipe, and the powder are sprayed. Clean the room and other equipment.