Many friends know that a lot of paint will be used in the decoration. So what do you know about this red Dan antirust paint ? What are the chemical composition of Red Dan antirust paint, and what is the role of Red Dan antirust paint? What are the advantages and benefits of this red Dan anti-rust paint, and how the red Dan anti-rust paint is used for construction. Our Xiaobian will introduce these related red Dan anti-rust paint knowledge to friends.
First, the introduction of the principle of ingredients
1, Hongdan anti-rust paint as a traditional anti-rust primer, his excellent performance can not be ignored. What's more important is that it is cheap, and it is a good example of "good quality and low price."
2. The average person thinks that lead soap formed by fatty acids and lead in oil is the cause of the corrosion resistance of red dan paint, because lead soap exists as a corrosion inhibitor; but there are also different people who believe that red lacquer is because of cathode and anode. Corrosion of the corrosion reaction produces protection.
3. The iron matrix is ​​formed because of the formation of a low solubility Pb ​​compound and a cathodic reaction; and its anodic reaction is because the soluble Fe forms an insoluble Fe compound and is polarized by deposition of the Pb oxide together with the hydroxide.
Second, Hongdan anti-rust paint advantages
1. Red Dan anti-rust paint is a kind of paint mixed with red Dan and dry oil. It has good permeability and wettability, and the paint film is soft and strong, but it is slow to dry.
2. In addition, due to the fact that red and red are more important, it is easy to precipitate, and it will become thicker when stored for a long time, and the brushing property is also poor.
3, Hong Dan anti-rust paint surface treatment: the performance of the coating is usually proportional to the degree of surface treatment.
4, steel sandblasting Sa2 level, freezing point or below the freezing point will cause the surface to freeze, thus affecting the adhesion of the paint film.
5, the temperature of the paint itself should be higher than 15 degrees to ensure normal construction performance.
Third, red Dan antirust paint color
1. The color of red dan paint is generally orange red. Nowadays, due to the deepening of people's attention to lead poisoning, in order to achieve the national requirements for environmental protection, now Hongdan anti-rust paint is gradually replaced by other balanced anti-rust primer.
2. However, for example, railway steel bridges, industrial pipelines and important mechanical equipment are generally permanent and important steel structures. Therefore, China is still widely used in such fields as Hongdan anti-rust primer, which still remains in certain fields. There is no substitute for existence.
3. It is worth noting that there are two types of red rust paints, one is red phenolic rust paint, and the other is red dan tar rust paint. However, the red dan content of these two types of red dan paint is higher than or equal to 65% in the non-volatile content.
Fourth, Hong Dan anti-rust paint construction steps
1. It can be sprayed with air or with a brush.
2, the substrate should be cleaned before use, no dust, rust and stains to start using.
3. Adjust the viscosity by using X-6 alkyd diluent.
4, when spraying the topcoat, if the gloss is too bright, after the surface of the previous paint is dried or polished with 120 mesh sandpaper, and then construction.
5. When choosing a paint spray gun, the distance from the steel surface is 20 cm. The diameter of the spray gun should be adjusted well, and the spray should be uniform. Select the brush, add the alkyd thinner to the alkyd antirust paint and mix evenly. Choose a good quality paint. Brush, brush soft and moderate, when applied to the surface of the object, the force should be even.
6. After the first spraying, the spraying time is about 30 minutes to spray the second time. Spraying two paints can increase the thickness of the paint film and improve the anti-rust effect.
What are the chemical composition of Hongdan anti-rust paint, what kind of role, our friends have already understood, what is the advantage of this red Dan anti-rust paint, including the construction process of Hongdan anti-rust paint, Our friends will have the decoration information they want to know in the future, so you can pay attention to our decoration home network.
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