Analysis of Antioxidant Performance of Graphite Crucible

**Anti-Oxidation Performance Analysis of Graphite Crucibles** Graphite crucibles are widely used in industrial applications such as metallurgy, foundry, machinery, and chemical industries due to their excellent thermal resistance, low thermal expansion coefficient, and strong resistance to thermal shock. They also exhibit remarkable corrosion resistance against both acidic and alkaline solutions, making them ideal for the smelting of alloy tool steel and non-ferrous metals and their alloys. This makes them not only technically effective but also economically beneficial. Graphite crucibles are primarily made from graphite, an allotrope of carbon. Each carbon atom is bonded covalently with three other atoms, forming a hexagonal lattice structure. However, despite their high thermal stability, graphite crucibles can be prone to oxidation at high temperatures, especially when exposed to air. This leads to structural weakening, loosening, and eventual shedding of the material over time. At high temperatures, materials like graphite electrodes, molds, and crucibles undergo oxidative combustion, increasing porosity and reducing the structural integrity of the surface layer. For example, during the conventional baking process of a ladle, a decarburized and loose layer of 15 mm or more often forms on carbon-containing refractory materials. Once filled with molten metal, this layer becomes highly susceptible to erosion. To combat these issues, **ZS-1021 High-Temperature Sealing Coating**, developed by Zhisheng Weihua, is commonly applied. This coating can withstand temperatures up to 1800°C and is composed of a special high-temperature solution. It has a nano-scale structure that provides excellent density, effectively preventing oxygen diffusion at high temperatures. With a hardness of 7–8H, it surpasses many metals in strength. The coating offers anti-rust, anti-corrosion, high-temperature resistance, and wear resistance, significantly extending the service life of graphite crucibles. In high-temperature environments where inductive heating occurs, graphite crucibles may experience sublimation and oxidation due to intense heat and arcs. This can lead to significant material loss, reaching up to 40–60% in some cases. ZS-1021 coating helps reduce oxidation rates by over 80%, enhancing energy efficiency and utilization of graphite materials by more than 95%. Additionally, **ZS-1011 Graphite Transition Coating Liquid** is used to impregnate and coat the crucible. This liquid penetrates into the pores, removes residual air, and forms a protective antioxidant film on the surface. This barrier prevents direct contact between the graphite and oxygen, thereby reducing oxidation and improving durability under extreme conditions. The **graphite antimony anti-oxidation coating** is a water-based, environmentally friendly inorganic coating that does not release volatile substances at either high or normal temperatures. It is resistant to acid and alkali, does not react with quenching media, and effectively protects the chemical stability of graphite crucibles at high temperatures. It can prevent oxidation rates from exceeding 95%. For more information about graphite crucibles and their anti-oxidation solutions, visit the official website of **Hebei Dacheng County Jindayu Factory**. Source: Hebei Dacheng County Jindayu Factory Http://news.chinawj.com.cn Analysis of Antioxidant Performance of Graphite Crucible Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn Analysis of Antioxidant Performance of Graphite Crucible

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