Definition: A galvanized screw is a transmission component coated with a zinc layer (electroplated zinc or hot-dip zinc) on the surface of the screw. It is mainly used to convert rotational motion into linear motion and has anti-corrosion ability.

• Base material: Usually carbon steel (such as 45# steel, 40Cr) or stainless steel, with a zinc layer covering the surface after galvanizing.
• Thread type: Commonly trapezoidal thread (Tr type) or ball screw; the latter is mostly used in high-precision scenarios.
• Galvanizing process: Divided into electroplated zinc (thin and uniform coating) and hot-dip zinc (thick coating, strong corrosion resistance).

• Sacrificial anode protection: The zinc layer preferentially oxidizes, delaying the corrosion of the substrate steel.
• Physical barrier: A dense zinc layer isolates water vapor, oxygen, and substrate from contact.

• Corrosion resistance: Suitable for humid, salt spray, acidic and alkaline environments (such as ships and chemical equipment).
• Economy: The cost of galvanizing is lower than that of stainless steel lead screws, and the lifespan is significantly extended.
• Low maintenance: The self-healing properties of the zinc layer reduce the need for frequent maintenance.
• Adaptability: Can be matched with various transmission systems, such as stepper motors and servo motors.

• Outdoor machinery: Construction machinery, agricultural equipment (exposed to rainwater and soil environments).
• Ship and ocean engineering: Deck lifting mechanism, valve control (resistant to salt spray corrosion).
• Chemical equipment: Reaction kettle transmission system, pipeline regulating device (acid and alkali resistant medium).
• Construction industry: Automatic doors and windows, lifting platforms (low-cost rust prevention requirements).
• Food processing: Meets hygiene standards (requires smooth surface and no risk of rust).