Anti-oxidation performance analysis of graphite crucibles. Analysis of anti-oxidation performance of graphite crucibles. Graphite crucibles have high temperature resistance, small thermal expansion coefficient, and certain anti-strain properties against thermal shock. They have strong corrosion resistance to acid and alkaline solutions and are excellent. Chemical corrosion resistance, so in the metallurgy, foundry, machinery, chemical and other industrial sectors, is widely used in the smelting of alloy tool steel and the smelting of non-ferrous metals and their alloys, and has a good technical and economic effects. Brass Floor Drain,4 Inch Brass Floor Drain,Shower Brass Drain,Anti Odor Floor Drain Brass Kaiping City Jinqiang Hardware Products Co.,Ltd , https://www.jmpowerdrain.com
Graphite crucible is mainly processed by graphite, which is an allotrope of carbon. The periphery of each carbon atom is connected with three other carbon atoms (multiple hexagons arranged in a honeycomb shape) for covalent The bonds combine to form a covalent molecule. Most of the graphite crucibles are carbon, and some of them are air, so that the graphite crucible is prone to oxidation, relaxation, and shedding at high temperatures.
Graphite material synthesis materials at high temperature include graphite electrode, graphite mold and graphite crucible. The graphite in these three materials is prone to oxidative combustion reaction at high temperature, resulting in increased porosity and structure of the surface carbon layer of the material. Loose, affecting the service life. Taking the conventional baking of ladle as an example, the carbon-containing (graphite) refractory material generally has a decarburized loose layer of 15 mm or more after baking, and the decarburized layer is quickly eroded after being filled with steel. At this time, most of the graphite crucibles use ZS-1021 high temperature sealing coating. This coating is high in temperature resistance. It is made of Zhisheng Weihua special high temperature solution, and the temperature can reach 1800 °C. It can be used for a long time to resist the flame grilling. The coating material is nanometer scales. The structure has good compactness and effectively prevents oxygen from diffusing at high temperature, and the hardness can reach 7-8H, and the hardness is higher than the hardness of the metal. Zhisheng Weihua ZS-1021 high temperature sealing coating paint is applied to form a dense coating on graphite crucible. It has strong anti-rust, anti-corrosion, high temperature and oxidation resistance, anti-tarnishing effect and wear resistance. The high temperature resistant sealing coating is applied to the kiln, graphite, metal, etc. to prevent the oxidation rate from reaching 80% at high temperature, and the energy saving utilization rate of the graphite crucible material can reach more than 95%.
In the graphite crucible which is inductively heated at a very high temperature, the graphite electrode used in the high-temperature oxidation environment may undergo partial sublimation oxidation due to the high-temperature arc, which may cause continuous consumption of the graphite crucible, and even breakage and breakage. The graphite crucible loss rate will reach 40-60%. ZS High Temperature Sealing Coatings, which has been researched and produced by Zhisheng Weihua for many years, is mainly used for anti-oxidation protection of graphite electrodes, graphite crucibles and graphite parts under high temperature environment, delaying oxidation speed, increasing material strength and improving service life. Effectively lower the probability of breakage, breakage, and shedding of the graphite electrode.
After the graphite crucible is impregnated and coated by the anti-oxidation coating, the high-temperature ZS-1011 graphite transition coating liquid can penetrate into the pores of the graphite crucible, evacuate the air remaining in the graphite crucible, and form a layer on the surface of the graphite crucible and the graphite crucible. Antioxidant protective film. It is this protective film that can effectively isolate the air from direct contact with the graphite crucible and undergo oxidation reaction. The graphite crucible impregnated with the Zhishengweihua anti-oxidation coating will not crack and fall off in the high temperature, so that the graphite can be effectively retarded. Oxidation of niobium extends the service life of graphite crucibles.
Graphite antimony anti-oxidation coating, water-based inorganic environmental protection coating, no volatile matter produced at high temperature and normal temperature. ZS-1021 Weihua high temperature sealing coating itself is resistant to acid and alkali, and does not react with quenching medium. It can effectively protect the chemical reaction of graphite crucible at high temperature, and can effectively prevent the high temperature oxidation rate of graphite crucible to over 95%.
Source: Hebei Dacheng County Jindayu Factory
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Analysis of Antioxidant Performance of Graphite Crucible