Galvanization Or Painting Steel Frame Bridge Portable Prefab Steel Bridges 10-60 Meters Span Length

Steel Frame Bridge For Sale/steel Portable Bridge For Sale

Zinc-rich primer coatings work to prevent corrosion in steel bridges through a combination of mechanisms that provide both physical and electrochemical protection:

1. **Cathodic Protection**
Zinc-rich primers contain a high concentration of zinc particles (typically 60-90%), which act as sacrificial anodes. Zinc is more electrochemically active than iron, so it corrodes preferentially when exposed to moisture and air. This sacrificial corrosion of zinc forms a protective layer of zinc oxide, which prevents the underlying steel from corroding.

2. **Barrier Protection**
The epoxy resin in zinc-rich primers forms a tight, impermeable barrier over the steel surface. This barrier physically blocks water, oxygen, and other corrosive elements from reaching the steel, significantly reducing the risk of rust and corrosion.

3. **Passivation of Steel Surface**
The zinc oxide layer formed during the corrosion of zinc can create a passive film on the steel surface. This film further inhibits the progress of rust formation by reducing the rate of iron dissolution.

4. **Reduced Oxygen Availability**
The combination of the tightly bonded epoxy layer and the zinc oxide formation limits the availability of oxygen at the metal surface. Since oxygen is a key component in the corrosion process, reducing its availability helps to slow down or prevent rusting.

5. **Chemical Protection**
The epoxy resin component in zinc-rich primers provides additional chemical resistance, protecting the steel from reactions with other corrosive chemicals.

Conclusion
Zinc-rich primer coatings protect steel bridges from corrosion through a dual mechanism of cathodic protection and barrier protection. The high zinc content ensures that the coating acts as a sacrificial anode, while the epoxy resin creates a durable barrier against environmental factors. This combination extends the lifespan of steel structures, reduces maintenance needs, and enhances overall durability.

Specifications:

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Advantage

Possessing the features of simple structure,
convenient transport, speedy erection
easy disassembling,
heavy loading capacity,
great stability and long fatigue life
being capable of an alternative span, loading capacity

Introduction to Jiangsu Zhonghai Bridge Equipment Co., Ltd.
Jiangsu Zhonghai Bridge Equipment Co., Ltd., established in 2010, is a high-tech enterprise specializing in the research, development, manufacturing, and sales of bridge equipment. With a registered capital of 55 million yuan, the company boasts a modern production base and advanced manufacturing facilities, achieving an annual output exceeding 60,000 tons. Its products are widely used in major bridge projects and transportation infrastructure construction both domestically and internationally.
The company consistently prioritizes technological innovation, supported by a skilled R&D team and long-term collaborations with renowned universities and research institutions. By continuously adopting and assimilating international advanced technologies, the company has achieved remarkable results in the fields of bridge steel structures, bridge construction equipment, and bridge inspection equipment. Multiple products have obtained national patent certifications and have been awarded provincial and municipal science and technology progress prizes.
In terms of production management, the company strictly adheres to the ISO9001 quality management system to ensure stable and reliable product quality. With exquisite craftsmanship and a rigorous approach, the company’s products have earned an excellent reputation in the market, serving clients across the country and exporting to regions such as Southeast Asia, the Middle East, and Africa.
Jiangsu Zhonghai Bridge Equipment Co., Ltd. adheres to the business philosophy of “Quality First, Service Excellence,” committed to providing high-quality products and comprehensive services to its clients. Looking ahead, the company will continue to increase investment in R&D, enhance its core competitiveness, and contribute to the development of China’s bridge construction industry, striving to become a global leader in the bridge equipment sector.