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Water/Sewage Treatment Chain: What Should Be Noted From Material Selection to Surface Treatment?

2024-05-21 17:30:38

Water/Sewage Treatment Chain: What Should Be Noted From Material Selection to Surface Treatment?




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In water and sewage treatment applications, selecting the right materials and surface treatments for conveyor chains is crucial due to the harsh and corrosive environments. Here are the key considerations from material selection to surface treatment:

Material Selection

  1. Corrosion Resistance:

    • Stainless Steel: Commonly used due to its excellent corrosion resistance properties, especially grades like 304 and 316 stainless steel. 316 stainless steel is particularly resistant to chlorides and acidic environments.

    • Plastic/Polymer Chains: Suitable for certain applications where metal corrosion is a significant concern. They can be used in less demanding load conditions.

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      Stainless Steel Sewage Treatment Chain

  2. Durability and Strength:

    • High-Tensile Steel: For applications requiring higher strength, high-tensile steel can be used but it must be coated or treated to resist corrosion.

    • Nickel-Plated Chains: Provide enhanced durability and some level of corrosion resistance compared to untreated steel.

  3. Wear Resistance:

    • Hardened Steel: For parts of the chain that experience significant wear, hardened steel can be used to extend service life.

Surface Treatment

  1. Coatings:

    • Zinc Plating: Offers moderate corrosion resistance, suitable for less aggressive environments.

    • Nickel Plating: Provides better corrosion resistance and is suitable for more demanding conditions.

    • Epoxy Coatings: Provide a strong barrier against corrosion and can be applied in multiple layers for enhanced protection.

  2. Galvanization:

    • Hot-Dip Galvanizing: Provides a thick, durable layer of zinc that offers good corrosion protection. Suitable for outdoor applications or where the chain may be submerged intermittently.

  3. Passivation:

    • Stainless Steel Passivation: Enhances the natural corrosion resistance of stainless steel by removing free iron from the surface and promoting the formation of a protective oxide layer.

Design Considerations

  1. Self-Lubricating Chains:

    • Use chains with built-in lubrication (e.g., sintered bushings with impregnated lubricants) to reduce maintenance needs and ensure smooth operation.

  2. Sealed Joints:

    • Chains with sealed joints or bushings can prevent contaminants from entering the joints, reducing wear and corrosion.

  3. Drainage and Cleaning:

    • Ensure the design allows for adequate drainage and easy cleaning to prevent the buildup of sludge and other corrosive materials.

Environmental Considerations

  1. Chemical Exposure:

    • Assess the types of chemicals present in the water/sewage treatment environment, including chlorine, hydrogen sulfide, and other acids or bases, and select materials accordingly.

  2. Temperature and UV Exposure:

    • Consider the operating temperatures and exposure to UV light if the chains are used in outdoor applications. Certain coatings and materials are better suited for high temperatures or UV exposure.

  3. Biological Factors:

    • Be aware of biological growth like algae and bacteria that can cause bio-corrosion. Material choices like stainless steel can help mitigate these issues.

Maintenance and Inspection

  1. Regular Cleaning:

    • Regularly clean the chains to remove buildup of sludge, debris, and biofilms that can accelerate corrosion and wear.

  2. Lubrication:

    • Use appropriate, non-reactive lubricants to maintain chain performance. For water/sewage environments, ensure the lubricant is resistant to washout.

  3. Inspection:

    • Perform routine inspections to identify early signs of wear, corrosion, or other issues. Replace or treat chains as needed to prevent unexpected failures.

Implementation Tips

  • Consult Material Specialists: Work with material engineers or suppliers to select the best material and treatment combination for your specific conditions.

  • Field Testing: Conduct field tests with selected materials and coatings in the actual operating environment to validate performance.

  • Documentation: Keep detailed records of the materials used, treatments applied, and maintenance performed to track performance and make informed decisions for future replacements.

By considering these factors in material selection and surface treatment, you can significantly enhance the longevity and performance of conveyor chains in water and sewage treatment applications.




GIDI CHAIN LIMITED supply lots of roller chain, conveyor chain, Leaf Chain, welded chain, forged chain, Palm Oil Mill Chain, Hoisting Chain,Mine and Metallurgy Chain, etc. totaling over 3000 varieties. and 90% of chains are exported to worldwide, Which mainly export to Southeast Asia, European, North America, South America. Chains are welcomed by customers with the excellent quality. Our company owns more than 100 sets of advanced and professional manufacturing equipment, Perfect and rigorous QC system is implemented in every process from material purchasing to finished products packaging. Also, we have passed the ISO9001: 2015 Quality Management System Certification.


More Detail : www.gidi-chain.com