導軌作為設備關鍵部件，長期暴露在潮濕、多塵或有腐蝕性介質的環境中，易因銹蝕影響運行。選擇合適的抗腐蝕材料，能延長其使用壽命，適配不同環境需求。

　　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.

　　金屬材料抗腐蝕性能通過合金優化或表面處理實現。304 不銹鋼含鉻 18%、鎳 8%，表面形成氧化鉻薄膜，適合潮濕環境，但抗氯離子能力有限。316 不銹鋼添加鉬元素，抗氯離子腐蝕性能大幅提升，適合海邊、化工車間等強腐蝕環境，壽命是 304 的 2-3 倍，成本較高。鍍鋅鋼在碳鋼表面鍍鋅，鋅層作犧牲陽極保護基體，熱浸鍍鋅層厚 80-100 微米，抗腐蝕優于電鍍鋅，適合戶外卷簾門等設備，性價比高。

　　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.

　　非金屬材料化學穩定性強，適合強腐蝕環境但強度較低。工程塑料中，聚四氟乙烯耐酸堿，摩擦系數低，適合精密導軌，需與金屬骨架復合；聚氯乙烯成本低、耐水性好，適合輕型卷簾門等場景，長期使用易受紫外線影響老化。復合材料結合塑料耐腐蝕性與纖維高強度，玻璃纖維增強聚丙烯導軌抗沖擊、重量輕，適合化工車間；玻璃纖維增強環氧樹脂導軌強度和耐溫性更高，可在 120℃以下環境使用。

　　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 ℃.

　　表面處理技術能低成本提升金屬導軌抗腐蝕性。磷化處理形成磷酸鹽薄膜，增強涂層附著力，常作噴涂、電泳預處理。電泳涂裝形成均勻漆膜，耐水和耐鹽霧性好，適合戶外導軌，顏色可定制，邊角覆蓋率高。達克羅涂層耐鹽霧性能達 500 小時以上，無氫脆風險，適合潮濕工業環境，顏色單一為銀灰色。

　　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.

　　復合結構材料兼顧強度與抗腐蝕性。金屬 - 塑料復合導軌以金屬為基體，表面復合工程塑料，適合重型卷簾門等有承重和防腐蝕需求的場景，塑料層結合強度需達 10MPa 以上。金屬 - 陶瓷復合導軌通過熱噴涂形成陶瓷涂層，硬度高、耐腐蝕性強，適合高溫、強腐蝕環境，陶瓷涂層脆性大，安裝需預留伸縮縫防開裂。

　　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.

　　選擇導軌抗腐蝕材料要考慮環境、力學性能和成本。潮濕無強腐蝕環境可選鍍鋅鋼或 304 不銹鋼；強腐蝕環境優先 316 不銹鋼或工程塑料；精密設備導軌可選聚四氟乙烯復合材料；高溫環境考慮陶瓷涂層或耐高溫合金。合理選擇能延長壽命，減少維護成本，保障設備穩定運行。

　　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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