There are three types of synthetic materials for graphite materials at high temperatures, including graphite electrodes, graphite molds and graphite crucibles. The graphite in these three materials is prone to oxidation and combustion reactions at high temperatures, causing surface glue on the material. The porosity of the carbon layer increases and the structure becomes loose, affecting the service life. Taking the conventional baking of ladles as an example, after baking, a decarburized loose layer of more than 15 mm is generally produced on the surface of carbon-containing (graphite) refractory materials. The decarburized layer is quickly eroded after the steel is filled. At this time, most graphite crucibles use ZS-1021 high-temperature resistant sealing coating. This coating has high temperature resistance. It uses Zhisheng Weihua's special high-temperature solution. The temperature resistance can reach 1800°C and can withstand open flame barbecue for a long time. The coating material is in the shape of nano fish scales. The structure has good density and can effectively prevent oxygen from diffusing at high temperatures. The hardness can reach 7-8H, which is higher than the hardness of metal. Zhishengweihua ZS-1021 high temperature resistant sealing coating is applied on the graphite crucible to form a dense coating, which has strong anti-rust, anti-corrosion, high temperature resistance, anti-oxidation, anti-discoloration, wear resistance and other properties. High-temperature-resistant sealing coatings are applied to kilns, graphite, metal, etc. to prevent oxidation at high temperatures and can reach more than 80%. The energy-saving utilization rate of graphite crucible materials can reach more than 95%.
As for graphite crucibles that are induction heated at extremely high temperatures, graphite electrodes used in high-temperature oxidation environments will undergo partial sublimation and oxidation due to high-temperature arcs, which will cause continuous consumption of the graphite crucible, and even breakage and damage. The graphite crucible loss rate will reach 40-60%. The ZS high-temperature resistant sealing coating produced by Zhisheng Weihua for many years is mainly used to protect graphite electrodes, graphite crucibles, and graphite parts from oxidation in high-temperature environments, delaying the oxidation rate, increasing material strength, and extending service life. Effectively reduces the probability of graphite electrode breakage, damage, and falling off.
After the graphite crucible is impregnated with antioxidant paint, the high-temperature ZS-1011 graphite transition coating liquid can penetrate into the pores of the graphite crucible, evacuate the remaining air in the graphite crucible, and remove the residual air in the graphite crucible pores. And an anti-oxidation protective film is formed on the surface of the graphite crucible. It is this protective film that can effectively isolate the air from direct contact with the graphite crucible and cause oxidation reactions. The graphite crucible impregnated with the Zhishengweihua antioxidant coating will not crack or fall off in the great changes in high temperature, thus effectively delaying the graphite crucible. The oxidation of the crucible extends the service life of the graphite crucible.
Technology first, graphite crucible antioxidant coating, water-based inorganic environmentally friendly coating, no volatile substances are produced at high temperature or normal temperature. The ZS-1021 Weihua high temperature resistant sealing coating itself is acid and alkali resistant and does not react with the quenching medium. It can effectively protect the graphite crucible from chemical reactions at high temperatures and prevent the graphite crucible from having an oxidation rate of more than 95% at high temperatures.