导轨作为设备关键部件，长期暴露在潮湿、多尘或有腐蚀性介质的环境中，易因锈蚀影响运行。选择合适的抗腐蚀材料，能延长其使用寿命，适配不同环境需求。

　　As a key component of equipment, the guide rail is exposed to damp, dusty, or corrosive media for a long time, which can easily affect its operation due to corrosion. Choosing appropriate corrosion-resistant materials can extend their service life and adapt to different environmental requirements.

　　金属材料抗腐蚀性能通过合金优化或表面处理实现。304 不锈钢含铬 18%、镍 8%，表面形成氧化铬薄膜，适合潮湿环境，但抗氯离子能力有限。316 不锈钢添加钼元素，抗氯离子腐蚀性能大幅提升，适合海边、化工车间等强腐蚀环境，寿命是 304 的 2-3 倍，成本较高。镀锌钢在碳钢表面镀锌，锌层作牺牲阳极保护基体，热浸镀锌层厚 80-100 微米，抗腐蚀优于电镀锌，适合户外卷帘门等设备，性价比高。

　　The corrosion resistance of metal materials is achieved through alloy optimization or surface treatment. 304 stainless steel contains 18% chromium and 8% nickel, forming a chromium oxide film on the surface, suitable for humid environments, but has limited resistance to chloride ions. Adding molybdenum element to 316 stainless steel greatly improves its resistance to chloride ion corrosion, making it suitable for strong corrosive environments such as seaside and chemical workshops. Its service life is 2-3 times that of 304, and its cost is relatively high. Galvanized steel is galvanized on the surface of carbon steel, with a zinc layer serving as a sacrificial anode protection substrate. The hot-dip galvanized layer is 80-100 microns thick and has better corrosion resistance than electroplating. It is suitable for outdoor rolling shutter doors and other equipment, with high cost-effectiveness.

　　非金属材料化学稳定性强，适合强腐蚀环境但强度较低。工程塑料中，聚四氟乙烯耐酸碱，摩擦系数低，适合精密导轨，需与金属骨架复合；聚氯乙烯成本低、耐水性好，适合轻型卷帘门等场景，长期使用易受紫外线影响老化。复合材料结合塑料耐腐蚀性与纤维高强度，玻璃纤维增强聚丙烯导轨抗冲击、重量轻，适合化工车间；玻璃纤维增强环氧树脂导轨强度和耐温性更高，可在 120℃以下环境使用。

　　Non metallic materials have strong chemical stability and are suitable for highly corrosive environments but have lower strength. In engineering plastics, polytetrafluoroethylene is acid and alkali resistant, has a low friction coefficient, and is suitable for precision guide rails. It needs to be combined with a metal skeleton; Polyvinyl chloride has low cost and good water resistance, suitable for scenarios such as lightweight rolling shutter doors. Long term use is susceptible to aging caused by ultraviolet radiation. Composite materials combined with plastic corrosion resistance and fiber high strength, glass fiber reinforced polypropylene guide rails are impact resistant and lightweight, suitable for chemical workshops; Glass fiber reinforced epoxy resin guide rails have higher strength and temperature resistance, and can be used in environments below 120 ℃.

　　表面处理技术能低成本提升金属导轨抗腐蚀性。磷化处理形成磷酸盐薄膜，增强涂层附着力，常作喷涂、电泳预处理。电泳涂装形成均匀漆膜，耐水和耐盐雾性好，适合户外导轨，颜色可定制，边角覆盖率高。达克罗涂层耐盐雾性能达 500 小时以上，无氢脆风险，适合潮湿工业环境，颜色单一为银灰色。

　　Surface treatment technology can improve the corrosion resistance of metal guide rails at low cost. Phosphating treatment forms a phosphate film, enhances coating adhesion, and is commonly used for spray coating and electrophoretic pretreatment. Electrophoretic coating forms a uniform paint film, with good water and salt spray resistance, suitable for outdoor guide rails, customizable colors, and high corner coverage. Dakro coating has a salt spray resistance of over 500 hours, no risk of hydrogen embrittlement, suitable for humid industrial environments, and a single silver gray color.

　　复合结构材料兼顾强度与抗腐蚀性。金属 - 塑料复合导轨以金属为基体，表面复合工程塑料，适合重型卷帘门等有承重和防腐蚀需求的场景，塑料层结合强度需达 10MPa 以上。金属 - 陶瓷复合导轨通过热喷涂形成陶瓷涂层，硬度高、耐腐蚀性强，适合高温、强腐蚀环境，陶瓷涂层脆性大，安装需预留伸缩缝防开裂。

　　Composite structural materials balance strength and corrosion resistance. The metal plastic composite guide rail is based on metal and coated with engineering plastic on the surface, suitable for heavy-duty rolling shutter doors and other scenarios with load-bearing and anti-corrosion requirements. The bonding strength of the plastic layer needs to be above 10MPa. The metal ceramic composite guide rail is coated with ceramic through thermal spraying, which has high hardness and strong corrosion resistance, suitable for high temperature and strong corrosive environments. The ceramic coating is brittle, and expansion joints need to be reserved for installation to prevent cracking.

　　选择导轨抗腐蚀材料要考虑环境、力学性能和成本。潮湿无强腐蚀环境可选镀锌钢或 304 不锈钢；强腐蚀环境优先 316 不锈钢或工程塑料；精密设备导轨可选聚四氟乙烯复合材料；高温环境考虑陶瓷涂层或耐高温合金。合理选择能延长寿命，减少维护成本，保障设备稳定运行。

　　The selection of corrosion-resistant materials for guide rails should consider the environment, mechanical properties, and cost. In a damp and non corrosive environment, galvanized steel or 304 stainless steel can be selected; Priority should be given to 316 stainless steel or engineering plastics in highly corrosive environments; Precision equipment guide rails can be made of polytetrafluoroethylene composite materials; Consider ceramic coatings or high-temperature resistant alloys for high-temperature environments. Reasonable selection can extend the lifespan, reduce maintenance costs, and ensure stable operation of equipment.

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