Jiangsu Zhonghai Bridge Equipment Co.,LTD
| Payment Terms | L/C,D/P,T/T |
| Supply Ability | 60000ton/year |
| Delivery Time | 8-10 work days |
| Packaging Details | Naked |
| Dimensions | Standard or Customized |
| Qualification | ISO or Similar |
| Span Length | 10-60 meters |
| Corrosion Prevention | Galvanization Or Painting |
| Grade | Q345 |
| Material | Steel |
| Structure Type | CB100 Steel Bridge |
| Net Width | double lane 7.35m |
| Brand Name | Zhonghai Bailey Bridge |
| Model Number | CB200/CB321 |
| Certification | IS09001, CE |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,D/P,T/T | Supply Ability | 60000ton/year |
| Delivery Time | 8-10 work days | Packaging Details | Naked |
| Dimensions | Standard or Customized | Qualification | ISO or Similar |
| Span Length | 10-60 meters | Corrosion Prevention | Galvanization Or Painting |
| Grade | Q345 | Material | Steel |
| Structure Type | CB100 Steel Bridge | Net Width | double lane 7.35m |
| Brand Name | Zhonghai Bailey Bridge | Model Number | CB200/CB321 |
| Certification | IS09001, CE | Place of Origin | China |
| High Light | painting steel frame bridge ，galvanization steel frame bridge ，galvanization prefab steel bridges | ||
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:
| CB321(100) Truss Press Limited Table | |||||||||
| No. | Lnternal Force | Structure Form | |||||||
| Not Reinforced Model | Reinforced Model | ||||||||
| SS | DS | TS | DDR | SSR | DSR | TSR | DDR | ||
| 321(100) | Standard Truss Moment(kN.m) | 788.2 | 1576.4 | 2246.4 | 3265.4 | 1687.5 | 3375 | 4809.4 | 6750 |
| 321(100) | Standard Truss Shear (kN) | 245.2 | 490.5 | 698.9 | 490.5 | 245.2 | 490.5 | 698.9 | 490.5 |
| 321 (100) Table of geometric characteristics of truss bridge(Half bridge) | |||||||||
| Type No. | Geometric Characteristics | Structure Form | |||||||
| Not Reinforced Model | Reinforced Model | ||||||||
| SS | DS | TS | DDR | SSR | DSR | TSR | DDR | ||
| 321(100) | Section properties(cm3) | 3578.5 | 7157.1 | 10735.6 | 14817.9 | 7699.1 | 15398.3 | 23097.4 | 30641.7 |
| 321(100) | Moment of inertia(cm4) | 250497.2 | 500994.4 | 751491.6 | 2148588.8 | 577434.4 | 1154868.8 | 1732303.2 | 4596255.2 |
| CB200 Truss Press Limited Table | |||||||||
| NO. | Internal Force | Structure Form | |||||||
| Not Reinforced Model | Reinforced Model | ||||||||
| SS | DS | TS | QS | SSR | DSR | TSR | QSR | ||
| 200 | Standard Truss Moment(kN.m) | 1034.3 | 2027.2 | 2978.8 | 3930.3 | 2165.4 | 4244.2 | 6236.4 | 8228.6 |
| 200 | Standard Truss Shear (kN) | 222.1 | 435.3 | 639.6 | 843.9 | 222.1 | 435.3 | 639.6 | 843.9 |
| 201 | High Bending Truss Moment(kN.m) | 1593.2 | 3122.8 | 4585.5 | 6054.3 | 3335.8 | 6538.2 | 9607.1 | 12676.1 |
| 202 | High Bending Truss Shear(kN) | 348 | 696 | 1044 | 1392 | 348 | 696 | 1044 | 1392 |
| 203 | Shear Force of Super High Shear Truss(kN) | 509.8 | 999.2 | 1468.2 | 1937.2 | 509.8 | 999.2 | 1468.2 | 1937.2 |
| CB200 Table of Geometric Characteristics of Truss Bridge(Half Bridge) | ||||
| Structure | Geometric Characteristics | |||
| Geometric Characteristics | Chord Area(cm2) | Section Properties(cm3) | Moment of Inertia(cm4) | |
| ss | SS | 25.48 | 5437 | 580174 |
| SSR | 50.96 | 10875 | 1160348 | |
| DS | DS | 50.96 | 10875 | 1160348 |
| DSR1 | 76.44 | 16312 | 1740522 | |
| DSR2 | 101.92 | 21750 | 2320696 | |
| TS | TS | 76.44 | 16312 | 1740522 |
| TSR2 | 127.4 | 27185 | 2900870 | |
| TSR3 | 152.88 | 32625 | 3481044 | |
| QS | QS | 101.92 | 21750 | 2320696 |
| QSR3 | 178.36 | 38059 | 4061218 | |
| QSR4 | 203.84 | 43500 | 4641392 | |
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
Company Details
Business Type:
Manufacturer
Year Established:
2014
Total Annual:
20753202.90-27670940.00
Employee Number:
100~150
Ecer Certification：
Verified Supplier
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 ... 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 ...
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