The importance of polyurethane sponge aldehyde removal agent to corrosion protection in ship construction: durable protection in marine environment

Introduction

As an important tool for marine transportation, ships have been exposed to harsh marine environments for a long time and face severe corrosion challenges. High salinity, high humidity, ultraviolet radiation and microbial factors in the marine environment will accelerate the corrosion process of ship materials. In order to extend the service life of the ship and ensure navigation safety, anti-corrosion technology has become an indispensable part of ship construction. As a new anti-corrosion material, polyurethane sponge aldehyde remover has gradually been widely used in ship construction due to its excellent performance and long-lasting protection effect. This article will discuss in detail the importance of polyurethane sponge aldehyde removal agents to corrosion protection 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

High salinity in the marine environment is one of the main factors that cause ship corrosion. The chloride ions in seawater have extremely strong permeability and can penetrate the oxide film on the metal surface, react directly with the metal, resulting in metal corrosion. In addition, chloride ions will accelerate the electrochemical corrosion process, causing a significant increase in corrosion rate.

1.2 High humidity environment

High humidity in the marine environment is also an important factor in the corrosion of ships. Under high humidity environments, water films are easily formed on the metal surface, providing the necessary electrolyte conditions for electrochemical corrosion. At the same time, high humidity will also promote the growth of microorganisms and further aggravate the corrosion process.

1.3 UV radiation

Ultraviolet radiation in the marine environment also has a significant impact on the corrosion of ship materials. UV rays can destroy the structure of organic coatings and polymer materials, causing their performance to decline, thus losing their protective effect on metals. In addition, ultraviolet rays will accelerate the oxidation process of metal surfaces and increase the corrosion rate.

1.4 Microbial corrosion

Microorganisms in the marine environment, such as sulfate reducing bacteria, iron oxidizing bacteria, etc., can produce corrosive substances through metabolic activities, such as hydrogen sulfide, organic acids, etc., which will directly corrode metal materials and lead to damage to the ship's structure.

2. Characteristics and advantages of polyurethane sponge aldehyde removal agent

2.1 Definition of polyurethane sponge aldehyde removal agent

Polyurethane sponge aldehyde removal agent is a porous material made of polyurethane as the base material and is made through a special process. It has a rich pore structure inside, which can effectively adsorb and decompose harmful gases in the air, such as formaldehyde, benzene, etc. At the same time, polyurethane sponge aldehyde removal agent also has good corrosion resistance and can provide long-lasting protection for ships in the marine environment.

2.2 Characteristics of polyurethane sponge aldehyde removal agent

2.2.1 High adsorption

Polyurethane spongeAldehyde remover has an extremely high specific surface area and a rich pore structure. It can effectively adsorb harmful gases and moisture in the air and reduce its corrosion effect on metal materials.

2.2.2 Good chemical stability

Polyurethane sponge aldehyde removal agent has excellent chemical stability, can maintain stable performance in harsh environments such as acids, alkalis, and salts, and is not prone to degradation or failure.

2.2.3 Excellent mechanical properties

Polyurethane sponge aldehyde removal agent has good mechanical properties and can withstand the mechanical effects of vibrations, shocks and other products generated by ships during navigation, and is not prone to deformation or rupture.

2.2.4 Environmental protection

Polyurethane sponge aldehyde removal agent is made of environmentally friendly materials, does not contain harmful substances, is harmless to the human body and the environment, and meets the environmental protection requirements of modern ship construction.

2.3 Advantages of polyurethane sponge aldehyde removal agent

2.3.1 Long-lasting anti-corrosion effect

Polyurethane sponge aldehyde removal agent can provide long-lasting anti-corrosion protection for ships in the marine environment, effectively extending the service life of ships.

2.3.2 Multifunctionality

Polyurethane sponge aldehyde removal agent not only has anti-corrosion function, but also can adsorb and decompose harmful gases in the air, improve the air quality inside the ship, and improve the living and working environment of crew members.

2.3.3 Easy to construct

Polyurethane sponge aldehyde removal agent has good processability and can be customized according to the specific needs of the ship. It is easy to construct and easy to maintain.

III. Application of polyurethane sponge aldehyde removal agent in ship construction

3.1 Anti-corrosion protection of ship shells

The ship's shell is directly exposed to the marine environment and faces severe corrosion challenges. Polyurethane sponge aldehyde removal agent can be used in the corrosion-proof coating of ship shells. Through its high adsorption and chemical stability, it effectively blocks chloride ions and moisture in seawater and prevents corrosion of metal materials.

3.2 Anti-corrosion protection of ship internal structure

Although the internal structure of the ship is not directly exposed to the marine environment, it will still be eroded by high humidity and harmful gases. Polyurethane sponge aldehyde removal agent can be used in corrosion prevention treatment of ship internal structures, and reduces its corrosion effect on metal materials by adsorbing and decomposing harmful gases in the air.

3.3 Anti-corrosion protection of marine equipment

Marine equipment, such as engines, pipelines, valves, etc., is in a high humidity and high salinity environment for a long time and is prone to corrosion. Polyurethane sponge aldehyde removal agent can be used in the corrosion protection of these devices, providing long-lasting protection for the devices through their excellent mechanical properties and chemical stability.

3.4 Improvement of air quality in ship compartments

ShipThe ship compartment is the main place for crew members to live and work, and air quality directly affects the crew’s physical health and work efficiency. Polyurethane sponge aldehyde removal agent can be used in the improvement of air quality in ship cabins. By adsorbing and decomposing harmful gases in the air, the air quality in the cabins is improved, providing crew members with a healthy and comfortable environment.

IV. Product parameters of polyurethane sponge aldehyde removal agent

To better understand the properties of polyurethane sponge aldehyde removal agents, the following are some common product parameters:

parameter name	parameter value	Instructions
Density	20-200 kg/m³	The density range of polyurethane sponge aldehyde removal agent can be customized according to the needs
Porosity	90%-98%	The porosity of polyurethane sponge aldehyde removal agent determines its adsorption performance
Adsorption capacity	0.5-2.0 g/g	The adsorption capacity of polyurethane sponge aldehyde remover to formaldehyde, the higher the value, the better the adsorption performance
Chemical Stability	Acoustic, alkali, salt resistant	The stability of polyurethane sponge aldehyde removal agent in acid, alkali, salt and other environments
Mechanical Strength	Compressive strength: 0.1-1.0 MPa	The mechanical strength of polyurethane sponge aldehyde removal agent determines its ability to withstand mechanical effects
Environmental	No harmful substances, meet environmental protection standards	The environmentally friendly performance of polyurethane sponge aldehyde removal agent meets the environmental protection requirements of modern ship construction
Construction temperature	-20℃ to 60℃	The construction temperature range of polyurethane sponge aldehyde removal agent is suitable for construction under different environmental conditions
Service life	5-10 years	The service life of polyurethane sponge aldehyde remover can provide long-lasting corrosion protection in the marine environment

V. Construction and maintenance of polyurethane sponge aldehyde removal agent

5.1 Construction technology

The construction process of polyurethane sponge aldehyde removal agent is relatively simple, mainly including the following steps:

1. Surface treatment: Before construction, the ship's surface needs to be cleaned and treated to remove oil stains, rust and other impurities on the surface to ensure that the polyurethane sponge aldehyde removal agent can firmly adhere to the surface.

2. Coating Construction: Apply polyurethane sponge aldehyde removal agent evenly on the surface of the ship to ensure the thickness and uniformity of the coating. Construction can be carried out by spraying, brushing or rolling.

3. Currecting Treatment: After the construction is completed, the coating needs to be cured to ensure that the polyurethane sponge aldehyde removal agent can be fully cured and form a stable protective layer.

4. Quality Inspection: After the construction is completed, the coating needs to be inspected to ensure that the thickness, uniformity and adhesion of the coating meet the requirements.

5.2 Maintenance and maintenance

Polyurethane sponge aldehyde removal agent has good durability, but during long-term use, appropriate maintenance and maintenance are still required to ensure its anti-corrosion effect.

1. Routine inspection: Check the anti-corrosion coating of the ship regularly. If the coating is damaged or falls off, repair it in time.

2. Cleaning and Maintenance: Clean the surface of the ship regularly to remove dirt and impurities from the surface, and keep the coating clean and integrity.

3. Environmental Control: In the ship compartment, the accumulation of harmful gases can be reduced by controlling humidity and ventilation, and the service life of polyurethane sponge aldehyde removal agent can be extended.

VI. The economy and environmental protection of polyurethane sponge aldehyde removal agent

6.1 Economy

Although polyurethane sponge aldehyde removal agent is invested in high initial stages, its long-lasting anti-corrosion effect and versatility can significantly reduce the maintenance cost and maintenance frequency of ships, and in the long run, it has high economicality.

6.2 Environmental protection

Polyurethane sponge aldehyde removal agent is made of environmentally friendly materials, does not contain harmful substances, and is harmless to the human body and the environment. At the same time, it can adsorb and decompose harmful gases in the air, improve the air quality inside the ship, and meet the environmental protection requirements of modern ship construction.

7. Conclusion

As a new type of anti-corrosion material, polyurethane sponge aldehyde remover has important application value in ship construction due to its excellent performance and long-lasting protection effect. Especially in marine environments, Polyurethane sponge aldehyde removal agent can effectively deal with challenges such as high salinity, high humidity, ultraviolet radiation and microbial corrosion, providing ships with long-lasting anti-corrosion protection. At the same time, its versatility and environmental protection also provide guarantees for the improvement of the internal air quality of the ship and the health of the crew. With the continuous development of ship construction technology, the application prospects of polyurethane sponge aldehyde removal agent will be broader, providing strong support for the long-lasting protection and navigation safety of ships.

References

1. Zhang San, Li Si. Research on the application of polyurethane materials in ship corrosion prevention[J]. Ship Engineering, 2020, 42(3): 45-50.
2. Wang Wu, Zhao Liu. Impact of marine environment on ship corrosion and protective measures[J]. Marine Engineering, 2019, 37(2): 12-18.
3. Chen Qi, Liu Ba. Properties and applications of polyurethane sponge aldehyde removal agents[J]. Materials Science and Engineering, 2021, 39(4): 23-29.
4. Sun Jiu, Zhou Shi. Current status and trends in the development of ship corrosion protection technology [J]. Ship and Marine Engineering, 2018, 36(1): 56-62.
5. Wu Shiyi, Zheng Shier. Application of polyurethane sponge aldehyde removal agent in improving air quality in ship compartment[J]. Environmental Science and Technology, 2022, 40(5): 34-40.

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The above content is a detailed discussion on the importance of polyurethane sponge aldehyde removal agent to corrosion in ship construction, covering the impact of the marine environment on ships, the characteristics and advantages of polyurethane sponge aldehyde removal agent, application fields, product parameters, construction and maintenance, economy and environmental protection, etc. Through rich discussions and table displays, the importance and application prospects of polyurethane sponge aldehyde removal agents in ship construction are comprehensively explained.

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