Corrosion Resistant/Zinc-Plated Chain (25ZP, 35ZP, 41ZP, 50ZP)

Corrosion Resistant/Zinc-Plated Chain (25ZP, 35ZP, 41ZP, 50ZP)

I. Principle of Galvanization Process

1. Pretreatment: Removal of oil, rust, and scale from the chain surface (e.g., pickling, alkaline cleaning, grinding) to ensure a clean surface, providing a good foundation for coating adhesion.

2. Galvanization Treatment: Deposition of a zinc layer on the chain surface via electroplating or hot-dip galvanization.

3. Post-treatment: Including passivation (forming a passivation film to enhance corrosion resistance), cleaning, and drying. In some cases, oiling or sealing is added to further improve protective effects.

II. Main Types of Galvanized Chains

1. Electro-Galvanized Chains

• Process Characteristics: Zinc ions are deposited onto the chain surface via electrolysis, forming a uniform zinc coating with a relatively thin thickness (typically 5-20 microns).

• Advantages: The coating is fine, smooth, and uniform in appearance (silver-white), with minimal impact on dimensional accuracy. Suitable for scenarios requiring high 外观 and size precision.

• Limitations: The thin coating offers weaker corrosion resistance compared to hot-dip galvanization, with limited protection in long-term outdoor or high-humidity environments.

2. Hot-Dip Galvanized Chains

• Process Characteristics: Chains are immersed in molten zinc (approximately 450°C), forming a zinc-iron alloy layer and a pure zinc layer on the surface, with a thicker coating (typically 50-150 microns).

• Advantages: The coating adheres firmly to the substrate, providing strong corrosion resistance and adapting to harsh environments (e.g., outdoor, humid, dusty, or mildly corrosive scenarios).

• Limitations: The thick coating may slightly affect the chain’s fitting precision; the surface appears slightly rough with a silver-gray color and possible zinc spangles.

III. Core Performance Advantages of Galvanized Chains

1. Excellent Corrosion Resistance and Rust Resistance

2. Retains Original Mechanical Properties

3. Wide Environmental Adaptability and Scenario Compatibility

• Outdoor Scenarios: Agricultural machinery (harvesters, seeders), outdoor conveying equipment, construction machinery, etc., resisting corrosion from wind, rain, and weather.

• Humid Scenarios: Food processing (non-direct food contact conveying links), aquaculture equipment, sewage treatment equipment, etc., resisting moisture erosion.

• Mildly Corrosive Scenarios: Auxiliary chemical equipment, mining conveying systems, coastal area equipment, etc., tolerating salt spray or mild chemical corrosion.

4. Clean Appearance with Both Protection and Basic Decorativeness

5. Low Maintenance Costs and Easy Usage

IV. Applicable Scenarios and Typical Applications

• Agricultural Machinery: Tractor transmission chains, harvester conveying chains, adapting to humid farmland and soil environments.

• Logistics and Conveying: Warehouse shelf conveyor chains, sorter chains, especially in humid warehouses or outdoor transfer stations.

• Outdoor Facilities: Sunshade awning drive chains, gate opening/closing chains, billboard rotation chains, resisting outdoor climate erosion.

• Light Industry Equipment: Laundry equipment drive chains, packaging machinery conveying chains, adapting to humid or moisture-rich environments.

• Mining and Construction: Small mining conveyor chains, auxiliary chains for construction elevators, resisting dust and moisture.

V. Usage and Maintenance Notes

1. Avoid Severe Impact or Overloading: Although the galvanized layer is durable, severe impact may cause coating peeling, affecting protection. Always adhere to the chain’s rated load requirements.

2. Regular Lubrication: The galvanized layer is not self-lubricating. Regularly apply suitable lubricants (e.g., mineral oil, grease) to reduce wear on chain joints; lubricants also help isolate moisture.

3. Avoid Long-Term Contact with Strong Corrosives: Galvanized chains are only suitable for mildly corrosive environments. For contact with strong acids, alkalis, or high-concentration salt spray, choose higher-grade anti-corrosion treatments (e.g., stainless steel chains or plastic-coated chains).

4. Store in Dry Environments: For long-term storage, avoid damp, dark environments. Apply anti-rust oil or wrap in moisture-proof paper to prevent localized coating rusting.

5. Regularly Inspect Coating Integrity: If coating damage or peeling is found during use, repair promptly (e.g., apply anti-rust paint) to prevent rapid rusting of exposed substrates