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Rust prevention measures for valves: Emphasis on both proper material selection and systematic protection. As key components in fluid control systems, valves’ operational stability has a direct impact on the safety of the system. Rust not only weakens the strength of valves, but it can also lead to seal failure, operational malfunction, and even leakage accidents. Therefore, it is crucial to take scientific anti-rust measures. To systematically prevent corrosion and ensure the long-term reliable operation of valves, efforts should be made from three aspects: material suitability, environmental isolation, and regular maintenance. I. Choose high-quality materials to prevent rust at the source; material selection is the key to rust prevention. Under normal operating conditions, stainless steel (such as 304, 316) or copper alloy valves should be preferred, as their natural oxidation resistance is far superior to that of cast iron or carbon steel. For example, in standard indoor water supply systems, stainless steel valves provide sufficient rust resistance and have low maintenance costs. For corrosive environments with high temperatures, high humidity, salt content, or chemical agents, the material standards need to be upgraded. High-performance metals such as Hastelloy and titanium alloys are used, or PTFE-lined valves are employed, with inert materials used to isolate corrosive agents thereby achieving long-term protection. For example, in the acid and alkali treatment processes of chemical plants, the use of Hastelloy valves can effectively resist chemical corrosion, ensuring the long-term stable operation of the equipment. If carbon steel valves must be used due to cost considerations or for temporary use, strict surface treatment is necessary, such as hot-dip galvanizing or chromium plating, in order to slow down the oxidation process through a dense coating and enhance corrosion resistance. II. Isolate the environment to cut off corrosion pathways; the external environment is an important factor that induces rusting. For valves installed outdoors, a rain cover should be fitted over the valve stem to prevent water from accumulating ； The exposed parts of the valve stem should be evenly coated with lithium-based grease or specialized anti-rust grease, such as the XX brand, to create an oil film barrier that prevents moisture and air from penetrating. The sealed joints should be reinforced with tape or sealant to prevent leakage of the medium from eroding the valve body. In areas where corrosive gases such as acids, alkalis, oil, and gas are present, valves should be placed in protective boxes or fitted with protective covers to minimize direct contact. Furthermore, when different metal materials (such as carbon steel and copper) are connected, insulating gaskets must be used to prevent electrochemical corrosion caused by potential differences. III. Standardized maintenance to ensure long-term operation: Rust prevention is a continuous task. A regular inspection system should be established, and dry cloths should be used to promptly remove dust, oil, and moisture from the surface of the valve body, in order to prevent impurities from absorbing moisture and accelerating corrosion. For moving parts such as valve stems and valve seats, lubricating anti-rust oil should be applied regularly to ensure operational flexibility as well as improve sealing and protection performance. Once local rust spots are detected, they must be dealt with immediately: first sand them until the original color of the metal is exposed, then apply anti-rust paint or specialized corrosion-resistant coating to prevent further rusting. At the same time, pay close attention to the condition of the seals; determine their degree of aging by checking for cracks, deformation, or loss of elasticity, and replace them promptly to prevent leakage of the medium from exacerbating corrosion. In summary, preventing rust in valves requires taking into account material, environment, and maintenance as three key factors, in order to establish a protection system throughout the entire lifecycle. Only through scientific selection, proper installation, and regular maintenance can the service life of valves be effectively extended, ensuring the safe and stable operation of the system.