The importance of polyurethane sponge deodorant to corrosion protection in ship construction: durable protection in marine environment

Introduction

As an important tool for marine transportation and operations, ships have been exposed to harsh marine environments for a long time and face severe corrosion challenges. Factors such as high salinity, high humidity, strong ultraviolet radiation and microbial erosion in the marine environment will accelerate the corrosion process of ship materials. Therefore, how to effectively prevent ship corrosion and extend its service life has become a key issue in ship construction and maintenance. As a new anti-corrosion material, polyurethane sponge deodorant plays an increasingly important role in ship construction with its unique performance and advantages. This article will discuss in detail the importance of polyurethane sponge deodorant to corrosion in ship construction, especially the lasting protection effect of marine environments.

1. The impact of marine environment on ship corrosion

1.1 High salinity environment

The salt content in the marine environment is extremely high, especially the chloride ions in seawater are very corrosive. Chloride ions can penetrate the oxide film on the metal surface and react directly with the metal, resulting in rapid corrosion of the metal. When a ship is immersed in seawater for a long time, its metal structure will inevitably be eroded by chloride ions, thereby accelerating the corrosion process.

1.2 High humidity environment

The humidity in the marine environment is extremely high, especially in tropical and subtropical waters, where the humidity remains above 80% year-on-year. The high humidity environment provides sufficient moisture for metal corrosion, making it easy for the metal surface to form an electrolyte film, accelerating the occurrence of electrochemical corrosion. In addition, high humidity environments can easily lead to condensation on the metal surface, further aggravating corrosion.

1.3 Strong UV radiation

The intensity of ultraviolet radiation in the marine environment is much higher than that in the land environment, especially in the waters near the equator. Ultraviolet radiation can destroy the molecular structure of organic materials, causing the material to age and embrittle, thereby reducing its corrosion resistance. The coatings and sealing materials on the surface of the ship are prone to aging under strong ultraviolet radiation, losing their protective effect, and thus accelerating metal corrosion.

1.4 Microbial erosion

There are a large number of microorganisms in the marine environment, such as bacteria, fungi and algae. These microorganisms are able to form biofilms on the surface of ships, secrete acidic substances, and corrode metal surfaces. In addition, microorganisms can also decompose organic materials, destroy the anti-corrosion coating of ships, and further aggravate corrosion.

2. Characteristics and advantages of polyurethane sponge deodorant

2.1 Basic characteristics of polyurethane sponge deodorant

Polyurethane sponge deodorant is a porous material based on polyurethane, with the following basic characteristics:

• High porosity: The porosity of polyurethane sponge deodorant is as high as more than 90%, which can effectively absorbStoring the deodorant to extend its action time.
• Good elasticity: Polyurethane sponge deodorant has good elasticity and can adapt to irregular shapes on the surface of the ship to ensure even distribution of the deodorant.
• Chemical corrosion resistance: Polyurethane sponge deodorant has good chemical corrosion resistance and can work stably in a high salinity and high humidity marine environment for a long time.
• Ultraviolet radiation resistance: Polyurethane sponge deodorant has good UV radiation resistance and can maintain stable physical and chemical properties under strong UV environments.

2.2 Anti-corrosion advantages of polyurethane sponge deodorant

Polyurethane sponge deodorant has the following advantages in ship corrosion prevention:

• Long-effect protection: Polyurethane sponge deodorant can continuously release the deodorant, form a stable protective film, and effectively prevent metal corrosion.
• Evening distribution: The porous structure of polyurethane sponge deodorant can ensure that the deodorant is evenly distributed on the surface of the ship and avoid local corrosion.
• Strong adaptability: Polyurethane sponge deodorant can adapt to irregular shapes on the surface of the ship and ensure anti-corrosion effect.
• Environmental and Safety: Polyurethane sponge deodorant is made of environmentally friendly materials, which is harmless to the human body and the environment, and meets the environmental protection requirements of ship construction.

III. Application of polyurethane sponge deodorant in ship construction

3.1 Anti-corrosion of ship shells

The ship's shell is a key part of ship's corrosion protection. It is exposed to the marine environment for a long time and is susceptible to high salinity, high humidity and strong ultraviolet radiation. Polyurethane sponge deodorant can be evenly distributed on the surface of the ship's shell, forming a stable protective film, effectively preventing metal corrosion. In addition, polyurethane sponge deodorant can also adsorb and store deodorant, extending its action time and ensuring the long-term anti-corrosion effect of the ship's shell.

3.2 Anti-corrosion inside the ship

Although the inside of the ship is not directly exposed to the marine environment, it will still be affected by high humidity and microbial erosion. Polyurethane sponge deodorant can effectively adsorb and store deodorant, preventing corrosion of the metal structure inside the ship. In addition, polyurethane sponge deodorant can also inhibit the growth of microorganisms, prevent the formation of biofilms, and further protect the internal structure of the ship.

3.3 Anti-corrosion of marine equipment

Marine equipment is a key component for the normal operation of the ship. It is exposed to the marine environment for a long time and is susceptible to corrosion. PolyurethaneThe sponge deodorant can be evenly distributed on the surface of the equipment to form a stable protective film, effectively preventing equipment corrosion. In addition, polyurethane sponge deodorant can also adsorb and store deodorant, extending its action time and ensuring the long-term anti-corrosion effect of the equipment.

IV. Performance parameters of polyurethane sponge deodorant

To better understand the performance of polyurethane sponge deodorant, the following table lists its main performance parameters:

parameter name	parameter value	Instructions
Porosity	≥90%	High porosity ensures adsorption and storage effect of deodorants
Elastic Modulus	0.5-1.5 MPa	Good elasticity ensures adaptation to irregular shapes on the surface of the ship
Chemical corrosion resistance	Excellent	Fast and stable work in high salinity and high humidity environment
Ultraviolet radiation resistance	Excellent	Maintain stable physical and chemical properties under strong UV environment
Environmental Performance	Complied with environmental protection standards	It is harmless to the human body and the environment, and meets the environmental protection requirements for ship construction

V. Construction technology of polyurethane sponge deodorant

5.1 Surface treatment

Before construction, the surface of the ship needs to be thoroughly cleaned to remove oil stains, rust and old coatings from the surface to ensure that the polyurethane sponge deodorant can firmly adhere to the surface of the ship.

5.2 Deodorant coating

The polyurethane sponge deodorant is evenly applied to the ship's surface to ensure that the deodorant can be evenly distributed on the ship's surface to form a stable protective film.

5.3 Curing treatment

After the coating is completed, curing treatment is required to ensure that the polyurethane sponge deodorant can firmly adhere to the surface of the ship and form a stable protective film.

5.4 Quality Inspection

After the construction is completed, quality inspection is required to ensure that the polyurethane sponge deodorant is coated evenly, the protective film is complete, and the corrosion resistance is good.

VI. Analysis of the economic benefits of polyurethane sponge deodorant

6.1 Extend the service life of the ship

Polyurethane sponge deodorant can effectively prevent ship corrosion and prolong ship's powerLifespan, reducing the cost of repair and replacement of ships.

6.2 Reduce maintenance costs

Polyurethane sponge deodorant can continuously release the deodorant, form a stable protective film, and reduce the frequency and cost of the ship's maintenance.

6.3 Improve ship operation efficiency

Polyurethane sponge deodorant can effectively prevent ship corrosion, ensure the normal operation of ship equipment, and improve the operational efficiency of ships.

7. Future development of polyurethane sponge deodorant

7.1 Technological Innovation

With the continuous advancement of technology, the performance of polyurethane sponge deodorant will continue to improve, and more efficient and environmentally friendly polyurethane sponge deodorant may appear in the future.

7.2 Application Area Expansion

Polyurethane sponge deodorant not only has important applications in ship construction, but may also expand to other fields in the future, such as marine engineering, petrochemical industry, etc.

7.3 Improvement of environmental protection requirements

With the continuous improvement of environmental protection requirements, the environmental performance of polyurethane sponge deodorant will be further optimized, and more environmentally friendly polyurethane sponge deodorant may appear in the future.

Conclusion

Polyurethane sponge deodorant, as a new type of anti-corrosion material, plays an increasingly important role in ship construction. Its unique performance and advantages enable it to provide long-lasting corrosion protection for ships in marine environments with high salinity, high humidity, strong UV radiation and microbial erosion. Through reasonable construction technology and quality inspection, polyurethane sponge deodorant can effectively extend the service life of the ship, reduce maintenance costs, and improve the operational efficiency of the ship. With the continuous advancement of technology and the improvement of environmental protection requirements, the application prospects of polyurethane sponge deodorants will be broader, providing more reliable anti-corrosion solutions for ship construction and marine engineering.

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