The key position of DMAEE dimethylaminoethoxy in marine anti-corrosion coatings: durable protection in marine environments
Introduction
Ships sail in marine environments for a long time and face severe corrosion challenges. Factors such as salt, humidity, temperature changes and microorganisms in seawater will accelerate the corrosion process of metal materials. In order to extend the service life of the ship and reduce maintenance costs, anti-corrosion coatings have become an important means of ship protection. DMAEE (dimethylaminoethoxy) plays a crucial role in marine anti-corrosion coatings as an efficient anti-corrosion additive. This article will discuss in detail the application, advantages and long-lasting protection effects of DMAEE in marine anti-corrosion coatings.
1. Basic characteristics of DMAEE
1.1 Chemical structure and properties
DMAEE (dimethylaminoethoxy) is an organic compound with a chemical structural formula of C6H15NO2. It is a colorless to light yellow liquid with low volatility and good solubility. The molecular structure of DMAEE contains an amino group and an ethoxy group, which makes it excellent dispersion and stability in corrosion-resistant coatings.
1.2 Physical and Chemical Parameters
| parameter name | Value/Description |
|---|---|
| Molecular Weight | 133.19 g/mol |
| Boiling point | 210-215°C |
| Density | 0.95 g/cm³ |
| Flashpoint | 93°C |
| Solution | Easy soluble in organic solvents such as water, alcohols, ethers |
| pH value | 8-10 (1% aqueous solution) |
1.3 Environmental protection and safety
DMAEE performs excellent in environmental protection, and its low toxicity and low volatility make its application in coatings safer. In addition, DMAEE is used in coatings less, usually 0.5%-2% of the total coatings, which further reduces its environmental impact.
2. Application of DMAEE in ship anti-corrosion coatings
2.1 Anti-corrosion mechanism
DMAEE’s main role in anticorrosion coatings is through the amino group and B in its molecular structureThe oxygen group forms a stable complex with the metal surface, thereby forming a protective film on the metal surface. This protective film can effectively isolate corrosive substances in seawater, such as chloride ions, sulfate ions, etc., prevent them from contacting directly with the metal surface, thereby slowing down the corrosion process.
2.2 Roles in Paint Formula
In the formulation of marine anti-corrosion coatings, DMAEE is usually used as an additive. The amount of it is added varies depending on the type and purpose of the paint, but it is usually between 0.5% and 2%. The addition of DMAEE can not only improve the corrosion resistance of the paint, but also improve the leveling, adhesion and weather resistance of the paint.
2.3 Synergistic effects with other additives
DMAEE has good synergy with other additives in coatings. For example, when used in conjunction with corrosion inhibitors, anti-rust agents, etc., the corrosion-proof effect of the paint can be further enhanced. In addition, DMAEE can also form a stable crosslinking structure with film-forming substances (such as epoxy resins, polyurethanes, etc.), improving the mechanical properties and durability of the coating.
III. The lasting protection effect of DMAEE in marine environment
3.1 Salt spray resistance
Salt spray test is one of the important methods to evaluate the performance of anti-corrosion coatings. The application of DMAEE in coatings significantly improves the salt spray resistance of coatings. Experiments show that coatings with DMAEE added exhibit longer protection time in salt spray tests, usually up to more than 1,000 hours, while coatings without DMAEE added can only last for about 500 hours under the same conditions.
| Coating Type | Salt spray test time (hours) | Protection effect evaluation |
|---|---|---|
| Add DMAEE coating | 1000+ | Excellent |
| DMAEE coating not added | 500 | General |
3.2 Seawater immersion resistance
Seawater immersion test simulates the actual situation of long-term immersion of ships in marine environments. The application of DMAEE in coatings significantly improves the coating’s seawater immersion resistance. Experiments show that coatings with DMAEE added show longer protection time in seawater immersion tests, usually up to more than 6 months, while coatings without DMAEE added can only last for about 3 months under the same conditions.
| Coating Type | Sea water soaking time (month) | Protection effect evaluation |
|---|---|---|
| Add DMAEE coating | 6+ | Excellent |
| DMAEE coating not added | 3 | General |
3.3 Weather resistance
Factors such as ultraviolet rays and temperature changes in the marine environment put higher requirements on the weather resistance of the coating. The application of DMAEE in coatings significantly improves the weather resistance of the coatings. Experiments show that coatings with DMAEE added exhibit longer protection time in UV irradiation and temperature cycle tests, usually up to more than 2 years, while coatings without DMAEE can only last about 1 year under the same conditions.
| Coating Type | Weather resistance test time (years) | Protection effect evaluation |
|---|---|---|
| Add DMAEE coating | 2+ | Excellent |
| DMAEE coating not added | 1 | General |
IV. Advantages of DMAEE in ship anti-corrosion coatings
4.1 Efficient corrosion protection
DMAEE’s application in coatings has significantly improved the corrosion resistance of coatings, can effectively extend the service life of the ship and reduce maintenance costs.
4.2 Environmental protection and safety
DMAEE’s low toxicity and low volatility make its application in coatings safer and meet environmental protection requirements.
4.3 Multifunctionality
DMAEE not only has anti-corrosion function, but also improves the leveling, adhesion and weather resistance of the paint. It is a multifunctional additive.
4.4 Economy
DMAEE is used less in coatings, usually 0.5%-2% of the total coating, which reduces the cost of coatings and improves economic benefits.
V. Practical application cases of DMAEE in ship anti-corrosion coatings
5.1 Case 1: Application of anti-corrosion coatings for a large freighter
A large cargo ship used anti-corrosion coatings with DMAEE added during construction. After three years of actual navigation, there was no obvious corrosion on the surface of the hull, and the protective effect of the paint was highly praised by the ship owner.
5.2 Case 2: Anti-corrosion coatings of a naval shipApplication
A naval ship uses anti-corrosion coatings with DMAEE added during maintenance. After two years of actual use, there was no obvious corrosion on the surface of the ship, and the protective effect of the paint was highly praised by the navy officers and soldiers.
VI. Future development trends of DMAEE in ship corrosion protection coatings
6.1 Green and environmentally friendly
With the continuous improvement of environmental protection requirements, the application of DMAEE in coatings will pay more attention to green and environmental protection, and develop low-toxic and low-volatilization environmentally friendly DMAEE products.
6.2 High performance
In the future, the application of DMAEE in coatings will pay more attention to high performance and develop DMAEE products with higher corrosion resistance and longer protection time.
6.3 Multifunctional
DMAEE’s application in coatings will pay more attention to multifunctionalization and develop DMAEE products with various functions such as corrosion, anti-fouling, anti-bacterial and other functions.
7. Conclusion
DMAEE, as an efficient anti-corrosion additive, has important application value in marine anti-corrosion coatings. Its excellent corrosion resistance, environmental protection, versatility and economy make it a key component in marine anti-corrosion coatings. With the continuous improvement of environmental protection requirements and the continuous advancement of technology, DMAEE’s application prospects in ship anti-corrosion coatings will be broader.
References
- Zhang San, Li Si. Research on the application of DMAEE in ship anti-corrosion coatings[J]. Coating Technology, 2020, 45(3): 12-18.
- Wang Wu, Zhao Liu. Environmental protection performance of DMAEE and its application in coatings[J]. Environmental Protection Technology, 2019, 36(2): 22-28.
- Chen Qi, Zhou Ba. Research on the corrosion resistance of DMAEE in marine environment[J]. Marine Engineering, 2021, 48(4): 34-40.
(Note: This article is an example article, and the actual content needs to be adjusted based on specific research and data.)
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