In industrial applications such as mold processing, mold heating tubes often need to work in high-temperature environments for a long time. To ensure the oxidation resistance of its material, it is necessary to start from multiple aspects such as material selection, surface treatment, and environmental control during use.
Firstly, material selection is crucial. High quality heating tube materials themselves have good antioxidant properties. For example, selecting stainless steel materials, especially those containing alloying elements such as chromium (Cr) and nickel (Ni). Chromium element can form a dense chromium oxide (Cr ₂ O3) protective film on the surface of the heating tube. This film can prevent oxygen from further reacting with the metal substrate inside the heating tube, just like putting a layer of "protective clothing" on the heating tube. Nickel element helps to improve the high-temperature strength and corrosion resistance of materials, enhancing the stability of heating tubes in high-temperature oxidation environments.
Secondly, surface treatment technology can also effectively enhance antioxidant properties. Common methods include ceramic coating treatment. Apply a layer of ceramic coating on the surface of the heating tube, which has good high temperature resistance and oxidation resistance. Ceramic coating can fill the tiny pores on the surface of the heating tube, further preventing the invasion of oxygen. At the same time, it can withstand thermal shock at high temperatures and will not peel off due to drastic temperature changes.
Furthermore, the reasonable control of the usage environment cannot be ignored. In the working environment of the mold heating tube, try to minimize contact with oxidizing gases. For example, gas purification devices can be equipped in heating systems to filter out harmful gases in the air, such as sulfur dioxide (SO ₂), hydrogen sulfide (H ₂ S), etc. These gases will accelerate the oxidation process of the heating tube at high temperatures. Additionally, it is important to keep the environment around the heating tube dry. The presence of moisture can undergo chemical reactions with metals at high temperatures, generating oxides such as rust, which reduces the service life of heating tubes.
Finally, regular maintenance and testing are crucial for ensuring antioxidant properties. During the use of the mold heating tube, regularly check its surface condition to see if there is any peeling or discoloration of the oxide skin. If problems are found, take timely measures such as repairing the surface or replacing damaged parts. At the same time, according to the working time and temperature parameters of the heating tube, arrange the maintenance cycle reasonably to ensure that it is always in a good antioxidant state. Through these comprehensive measures, the oxidation resistance of the mold heating tube can be effectively ensured during long-term operation in high temperature environments.
