Exploring the differences and application scenarios of electrogalvanizing technology in the two places | Attached with the latest developments in the green transformation of the industry

1. Electrogalvanizing technology: "invisible protective clothing" for industrial parts

Electrogalvanizing is a key technology that forms a zinc coating on the metal surface through an electrolytic process to prevent corrosion of the substrate. It is widely used in automobiles, home appliances, construction and other fields. As the core cluster of the electrogalvanizing industry in the Yangtze River Delta, Ningbo electrogalvanizing features high-end equipment manufacturing, while Cixi electrogalvanizing focuses on small hardware and home appliance accessories. The two places complement each other to form a complete industrial chain.

Technology comparison

Dimension Ningbo electrogalvanizing Cixi electrogalvanizing

Technology focus Thick coating, high corrosion resistance (≥20μm) Precision coating (5-15μm), appearance finish

Application areas Port machinery, aerospace components Sockets, hinges and other home appliance hardware

Innovation direction Nanocomposite coating technology Promotion of cyanide-free zinc plating process

II. Environmental transformation: from "high pollution" to "green electroplating"

Wastewater treatment revolution

A Ningbo company adopts "membrane separation + evaporation crystallization" technology to achieve 90% reuse of electroplating wastewater; some factories in Cixi introduce photovoltaic power generation, reducing carbon dioxide emissions by more than 2,000 tons per year.

Policy driven

Zhejiang Province's new regulations in 2025 require that 100% of electrogalvanizing companies be equipped with online monitoring systems, and the two places have taken the lead in completing the transformation (Cixi electrogalvanizing company case).

3. Industrial Chain Collaboration: The "Tale of Two Cities" of Ningbo and Cixi

Ningbo: Relying on the port advantage, it provides heavy anti-corrosion coatings for large equipment and serves companies such as Sany Heavy Industry;

Cixi: Relying on the home appliance industry cluster, it supplies 30% of the world's socket galvanized parts annually (Ningbo electrogalvanizing cooperation project);

Technology sharing: The two places jointly build an "electrogalvanizing R&D center" to jointly tackle the problem of import substitution of high-end galvanized materials.

4. Popular Science Q&A: Electrogalvanizing VS Hot-dip Galvanizing

Q: Why are Cixi electrogalvanized parts more suitable for small hardware?

A: The electrogalvanized layer is uniform and thin (can be accurate to 5μm), which does not affect the assembly of precision parts, while the hot-dip galvanized layer is thicker (usually more than 80μm), which is suitable for large parts such as steel structures.

Conclusion

With the upgrading of green manufacturing and intelligentization, the electrogalvanizing industry in Ningbo and Cixi is transforming from traditional processing to "technology output". In the future, the two places may become important setters of global electrogalvanizing technology standards.