What is graphite flake anticorrosive coating, and what kind of paint is generally brushed on chimney

According to the performance of the product, the product ** also has a number of differences. Founded in December 1998 and located in Shanghai, Shanghai Xili Carbon is committed to the production and research and development of graphite products, in line with the business philosophy of "quality first, integrity-based", adhering to the scientific concept of development, always focusing on providing customers with high-tech content of various high-quality graphite products.

Flakes refer to thin sheets of a certain particle size and thickness after physical or chemical treatment of metals and certain inorganic compounds. The flake anticorrosive coating is a high-build heavy anticorrosive coating composed of various metal or non-metal flake aggregates and various high-performance corrosion-resistant resins and corresponding additives.

Because the flake coating is a multi-layer sheet structure, it can form a parallel superimposed staggered thick film, which produces a special "labyrinth" effect, which not only divides the coating into many small spaces and reduces the shrinkage stress and expansion coefficient of the coating, but also forces the medium to penetrate in a roundabout way, thereby delaying the diffusion of the corrosive medium and the way and time to invade the matrix, so it has excellent permeation resistance, impact resistance, wear resistance and corrosion resistance, and prolongs the service life of the coating. In recent years, flake coatings have attracted more and more attention from the industry at home and abroad, and have become a rapidly developing and widely used heavy anticorrosive coating.

The earliest and most widely used glass flake anticorrosive coating was developed in flake coatings. Glass flakes are chemical glass with good acid resistance (also known as C glass or medium alkali glass), which is melted, blown, quenched, broken and screened at a high temperature of more than 1000.

As follows: flake graphite is a natural crystalline graphite, which is similar to fish phosphorus, belongs to the hexagonal crystal system, has a layered structure, and has good high temperature resistance, electrical conductivity, thermal conductivity, lubrication, plasticity and acid and alkali resistance.

Uses: Flake graphite is widely used in high-grade refractories and coatings in the metallurgical industry. Such as magnesia carbon bricks, crucibles, etc.

Stabilizer for pyrotechnic materials in military industry, desulfurization booster in smelting industry, pencil lead in light industry, carbon brush in electrical industry, electrode in battery industry, catalyst in fertilizer industry, etc. After deep processing, flake graphite can be used to produce graphite emulsion, which is used for lubricants, release agents, wire drawing agents, conductive coatings, etc. It can also produce expanded graphite, which is used as a raw material for flexible graphite products, such as flexible graphite seals and flexible graphite composite material products.

Specifications: Classified according to the high and low carbon content.

For example, c%" is high-purity graphite; 94% "c%< 99% is high-carbon graphite; 80% "C%< 94% is medium carbon graphite; 50% "c%< 80% is low-carbon graphite. Flake graphite is widely used in refractory materials in the metallurgical industry, pencil leads in light industry, electrodes in battery technology, lubricating and sealing materials in the chemical industry, etc. As a functional filler for coatings, it is mainly used for anticorrosive coatings, fire retardant coatings and conductive coatings.

Categorized by granularity.

When the particle size is less than W38 micronized graphite.

The flake graphite standard is GB T 3518-2008

In fact, the best solution is to use ZS-1042 and ZS-1041 composite brushing, so that the anti-seepage, thermal shock and impact resistance is better, the wear resistance time is also long, and the overall thickness is best to reach more than 600um, which can be used for more than 10 years. Both of these belong to graphite flake coatings, inorganic silicon modified resin film-forming, Beijing Zhisheng Weihua products, please consult Ai Gong for details.

Graphite flake anticorrosive coatings are divided into types and types, of which the type focuses on flexibility and thin coatability, and the representative product is ZS-1041, and the type focuses on high hardness and thick coating, and the representative product is ZS-1042. Some working conditions can choose one according to the specific situation, and some working conditions need to be used in combination with type.

Graphite flake coating (graphite flake cement) is an upgraded product of the second generation of flake anti-corrosion technology after glass flake coating (cement), graphite flake coating coating will gradually replace glass flake coating in the next five years, and become the mainstream material for flue gas circulation emission and desulfurization conditions, especially in the power plant chimney flue, desulfurization tower will be widely used, Huaneng, Huadian, Datang, Guodian, China Power Investment and other major power plants and some local power plants have begun to use new projects and renovation projects.

Different types of anticorrosive coatings mainly contain different ingredients, and the new anticorrosive coating material is a solid lubricant made of PTFE (polytetrafluoroethylene). For example, the anti-corrosion coating material sprayed by Eubo has excellent chemical stability and corrosion resistance, can resist most chemical corrosion, and is widely used in various working conditions that require resistance to acid, alkali and organic solvents. In the ASTM B-177 salt spray test, it lasts up to 2500 hours while the red embroidery area is less than 15%.

In addition, it can be used in different colors to indicate different specific applications, such as blue, red, green, silver and black, etc., for easy management and future maintenance.

Because graphite is chemically --- carbon, the following are some of the most important properties of carbon materials:

1.Excellent heat resistance, no softening, no melting, low vapor pressure;

2.Graphitic carbon materials have a high thermal conductivity and can be widely selected from carbon to graphite;

3.The coefficient of thermal expansion is small;

4.Good conductivity and a wide range of selectable conductivity from carbonaceous to graphitic;

5.Light weight and easy to process;

6.The intensity increases with increasing temperature;

7.Stable in size and mechanical properties at high temperatures;

8.Low modulus of elasticity;

9.Good thermal shock resistance;

10.A wide range of carbon materials can be produced from porous to impermeable;

11.It is self-lubricating and does not burn when sliding friction;

12.Easy to machine (graphitic);

13.Good chemical corrosion resistance, and excellent ablation and abrasion resistance;

14.Difficult to wet and does not stick to most molten metals and slag;

15.No oxide layer due to corrosion;

16.High purity, little contamination of other materials.

Because of its stable chemical properties, it is not easy to react chemically like other substances, so it is corrosion-resistant.

Classified according to the high and low carbon content.

For example, c% is high-attack pure graphite.

94% "c%< 99% is high-carbon graphite; 80% "C%< 94% is medium carbon graphite; 50% "c%< 80% is low-carbon graphite.

Categorized by granularity.

When the particle size is less than W38 micronized graphite.

Standard flake graphite standard GB T 3518-2008

Flake graphite bai:

Graphite crystals

scaly; This is formed by the deterioration of DAO under the pressure of high intensity, and there are large scales and fine scales. This type of graphite ore is characterized by a low grade, generally between 2 3%, or 10 25%. It is one of the most floatable ores in nature, and high-grade graphite concentrate can be obtained after multiple grinding and selection.

Graphite is a carbonaceous crystalline mineral, and its crystalline lattice is a hexagonal layered structure. The distance between each mesh layer is human, and the spacing of carbon atoms in the same mesh layer is 1 42a. It belongs to the hexagonal crystal system with complete layered cleavage.

The cleavage plane is dominated by molecular bonds, and the attraction to molecules is weak, so its natural floatability is very good.

Laixi City, Shandong Province is one of the important graphite producing areas in China, with proven reserves of 10,000 tons of graphite and reserves of 10,000 tons.

Graphite soft, blackish-gray; It has a greasy feeling and can contaminate the paper. The hardness is 1 2, and its hardness can increase to 3 5 with the increase of impurities in the vertical direction. The specific gravity is 1 9 2 3.

Under the condition of oxygen isolation, its melting point is above 3000, and it is one of the most temperature-resistant minerals.

There is no pure graphite in nature, which often contains impurities such as Si02, A1203, Fe0, CaO, P2O5, Cu0, etc. These impurities often occur in the form of minerals such as quartz, pyrite, carbonate, etc. In addition, there are gaseous parts such as water, asphalt, CO2, H2, CH4, N2, etc.

Therefore, in the analysis of graphite, in addition to the fixed carbon content, the volatile matter and ash content must also be determined.

The process characteristics of graphite are mainly determined by its crystalline form. Graphite minerals with different crystalline forms have different industrial values and uses. Industrially, natural graphite is divided into three categories according to different crystalline forms.

Answer: Graphite is an allotropic form of carbon, which is gray-black, opaque solid, chemically stable, corrosion-resistant, and not easy to react with acids, alkalis and other agents. It is burned in oxygen to produce carbon dioxide, which can be oxidized by strong oxidants such as concentrated nitric acid, potassium permanganate, etc. It can be used as an anti-wear agent, lubricant, high-purity graphite is used as a neutron moderator in atomic reactors, and can also be used to manufacture crucibles, electrodes, brushes, dry batteries, graphite fibers, heat exchangers, coolers, electric arc furnaces, arc lamps, pencil refills, etc.

Like carbon, the chemical composition is C

But the molecular structure is lamellar.

Rosso not?

Allotropes of carbon are not to be studied!

Cow people, one dares to ask and one dares to answer.

China is a big country of natural graphite resources, with reserves, output and exports ranking first in the world, but due to the lack of manufacturing technology and technology development capabilities, it is still dominated by raw material production and processing of low value-added flake graphite, while the flexible graphite industry of the United States, Japan, Germany and France is in the leading position in the world. In 1963, the United States was the first to successfully develop and successfully carried out practical working conditions experiments on atomic valves, which attracted the attention of all countries in the world, and has been widely used in industrial production in the 70s. Flexible graphite is an ideal sealing material, commonly known as "sealing king", with good mechanical, physical and chemical properties.

According to the different crystalline forms, natural graphite can be divided into three categories: cryptocrystalline graphite, dense crystalline graphite and flake graphite, among which, flake graphite has superior floatability, lubricity and plasticity than other types of graphite, so it has the greatest industrial value. Expanded graphite is made from natural graphite flakes.

Natural graphite is treated with a strong oxidizing mixed acid to form a so-called interlayer compound - graphite oxide. Graphite oxide is heated and decomposes to release carbon dioxide and other gases, if it is an instantaneous high temperature, it rapidly decomposes and expands (its expansion degree can be 100 300 times that of the original), forming a loose, soft and flexible substance, that is, expanded graphite, which is called flexible graphite after pressure molding. It not only retains the characteristics of graphite, but also overcomes the shortcomings of natural graphite that it is brittle and brittle, and has poor impact resistance.

After the expansion of graphite loose, porous and curly, similar to a caterpillar, called a worm, its surface area is large, the surface energy is high, the adsorption capacity is strong, no binder is required, only mechanical processing can make the worms adsorb each other, chimeric and combined, and processed into various shapes of seals, which is the self-viscosity of expanded graphite. The larger the expansion factor, the better its self-adhesiveness and the higher the quality of the pressed seal.

Graphite is composed of the element carbon.

Answer: CS graphite modified cement-based composite insulation board is called carbon silicon board, and it will also be called CS board. Carbon-silicon board is made of ordinary Portland cement, high-quality mineral powder, adding carbon fiber, silicone, inorganic foaming agent and other additives, using advanced production equipment and foaming technology through special technology to make inorganic fireproof and thermal insulation board.

Hope it helps, dear.