Coating technology: key points of construction of inorganic zinc silicate primer

Core tip: inorganic zinc silicate primer is a very important coating in industrial anticorrosion, which is widely used in large projects Inorganic zinc silicate primer contains high zinc powder, which has excellent cathodic protection for steel, that is, electrochemical corrosion protection Zinc powder sacrifices anode to protect cathode and prevent iron from losing electron, so steel will not be corroded Inorganic zinc silicate primer has many characteristics The content of zinc powder is high, and the content of nonvolatile metal zinc can reach 80% High film hardness and wear resistance Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Home of coatings: inorganic zinc silicate primer is a very important coating in industrial anticorrosion, which is widely used in large projects Inorganic zinc silicate primer contains high zinc powder, which has excellent cathodic protection for steel, that is, electrochemical corrosion protection Zinc powder sacrifices anode to protect cathode and prevent iron from losing electron, so steel will not be corroded Inorganic zinc silicate primer has many characteristics, such as high content of zinc powder, non-volatile metal zinc content can reach 80%, high film hardness, wear resistance and high temperature resistance Compared with organic paint, inorganic paint has stronger heat resistance, can be used under 400 ℃ with good weather resistance, compact coating structure and strong UV resistance Although the coating characteristics are important, the following points should be paid attention to in the construction process to avoid unnecessary operation errors: 1 Zinc salt treatment due to the large zinc powder content of the paint film, the coating surface will produce zinc salt, which is a white oxide layer, which will affect the adhesion between layers when the next coating, and will cause the paint film to fall off Therefore, it must be cleaned before coating 2 The spraying thickness of inorganic zinc silicate primer has a large content of metal zinc, and the film hardness is very high, so it is easy to become brittle and crack Therefore, the film thickness should not be too thick during spraying construction Generally, it is recommended that the film thickness be 80-100 microns 3 When spraying is used for paint mixing, the paint in the barrel shall be continuously mixed to prevent the zinc powder from settling at the bottom 4 Industrial anticorrosion of sealing primer, such as bridge coating, is mostly the supporting structure of primer, sealing paint, intermediate paint and finishing paint Using sealing primer can avoid coating blistering, exhaust the air between primer layers, and get better coating quality 5 High temperature resistant inorganic zinc silicate primer shall be used in the environment below 400 ℃, for example, it shall be used in steam pipeline insulation project There are often users who use inorganic zinc silicate primer matched with organosilicon high temperature resistant finish The common problems during construction are film blistering and film non drying So what's the reason? In high temperature environment, if there is no suitable sealing paint, the porous surface of primer is easy to be blistered by high temperature resistant finish The solution is to spray a thin layer of high temperature resistant paint first, and then spray according to normal construction after drying to avoid bubbles The non drying of the silicone high temperature resistant paint is mainly determined by the characteristics of the paint itself The silicone paint needs to be baked to achieve better drying and film hardness The non baking coating just adheres to the surface Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,