Aging mechanism and anti-aging measures of electromagnetic protective absorbing coatings

Brief introduction

Electromagnetic protective absorbing coatings play a crucial role in protecting electronic devices from electromagnetic interference and improving the stealth performance of military equipment due to their unique electromagnetic wave absorption and attenuation characteristics. However, with the passage of time, coatings will gradually experience aging under the combined effects of complex environmental factors such as sunlight radiation, temperature changes, humidity, and air pollution, such as color fading, coating cracking, peeling, etc., which will seriously affect their electromagnetic protection performance. Therefore, forElectromagnetic protection absorbing coatingIt is of great significance to conduct in-depth research on the aging mechanism of coatings and take effective measures to delay their aging process, in order to ensure the long-term performance stability of coatings.

2、 Aging mechanism of electromagnetic protective absorbing coating

2.1 Sunlight Radiation

The ultraviolet rays in sunlight are one of the main external factors causing the aging of electromagnetic protective absorbing coatings. Ultraviolet radiation has high energy and can break chemical bonds in coatings, causing changes in the molecular structure of pigments and leading to aging phenomena such as color fading and resin decomposition. In addition, ultraviolet radiation can promote the generation of free radicals in coatings, accelerate oxidation reactions, and further exacerbate the aging process of coatings.

2.2 Temperature changes

The impact of temperature fluctuations on electromagnetic protective absorbing coatings cannot be ignored. In high temperature environments, the resin components in coatings are prone to thermal decomposition reactions, leading to structural damage to the coating; In low-temperature environments, the movement of molecular chains in coatings slows down, making the coating brittle and hard, and prone to cracking. Long term temperature fluctuations can cause stress concentration inside the coating, leading to aging phenomena such as cracking and peeling of the coating.

2.3 Influence of humidity

Humidity is relatedElectromagnetic protection absorbing coatingAging also has significant impacts. In high humidity environments, coatings are prone to water absorption and expansion, resulting in uneven stress distribution inside the coating, which can lead to problems such as coating foaming and peeling. In addition, moisture can react chemically with certain components in the coating, leading to a decrease in coating performance.

2.4 Atmospheric Pollution

Pollutants in the atmosphere, such as sulfur dioxide and nitrogen oxides, can react chemically with the components in electromagnetic protective absorbing coatings, causing corrosion, discoloration, and other phenomena on the surface of the coatings. These pollutants will also adhere to the surface of the coating, forming a layer of dirt that is difficult to remove, further affecting the electromagnetic protection performance of the coating.

3、 Measures to delay the aging of electromagnetic protection absorbing coatings

In response to the above aging mechanism, we can take the following measures to delay the aging process of electromagnetic protective absorbing coatings:

3.1 Selection of high-performance materials

Choosing resins, pigments, and fillers with high weather resistance and stability is the key to delaying the aging of coatings. Advanced Institute (Shenzhen) Technology Co., LtdYanbo brand electromagnetic protection absorbing coatingBy adopting advanced material formulas and preparation processes, the long-term stability of the coating in complex environments is ensured. Among them, the selected resin has excellent UV resistance, high and low temperature resistance, and can effectively resist external environmental erosion; Pigments and fillers are specially treated to have high stability and durability.

3.2 Adding additives

Adding appropriate additives such as UV absorbers, antioxidants, light stabilizers, etc. to coatings can significantly improve their aging resistance. These additives can absorb ultraviolet energy, prevent oxidation reactions, stabilize free radicals in coatings, and thus delay the aging process of coatings. Meanwhile, the selection and use of additives should take into account their compatibility with other components in the coating to ensure that the overall performance of the coating is not affected.

3.3 Optimize construction technology

The optimization of construction technology is equally important for improving the aging resistance of coatings. Before applying the coating, strict surface treatment such as rust removal, oil removal, phosphating, etc. should be carried out on the coated object to ensure that the coating can firmly adhere to the substrate. At the same time, the temperature, humidity, and ventilation conditions of the construction environment should be controlled to avoid adverse environmental effects on the coating process. In addition, the thickness and uniformity of the coating are also important factors affecting the aging resistance of the coating. Therefore, the parameters during the coating process should be strictly controlled to ensure the quality of the coating.

3.4 Regular maintenance and inspection

Regularly forElectromagnetic protection absorbing coatingConducting maintenance checks is an effective means of extending its service life. By checking the appearance, color, adhesion and other indicators of the coating, aging problems can be detected and dealt with in a timely manner. For coatings with slight aging, measures such as touch up painting and cleaning can be taken for repair; For severely aged coatings, new coatings should be replaced in a timely manner to ensure their electromagnetic protection performance.

3.5 Adopting a multi-layer coating system

Adopting a multi-layer coating system is one of the effective ways to improve the aging resistance of electromagnetic protection absorbing coatings. By combining primer, intermediate coat, and topcoat, the advantages of different coatings can be fully utilized to improve the overall protective performance and aging resistance. Primer is mainly responsible for the adhesion and anti-corrosion effect with the substrate; Intermediate paint plays a role in enhancing coating thickness, improving coating toughness and weather resistance; The topcoat is responsible for providing good electromagnetic protection performance and aesthetic effect. The rational design of multi-layer coating systems can significantly improve the overall performance and service life of coatings.

4、 Conclusion

The aging of electromagnetic protective absorbing coatings is a complex and variable process, influenced by various external environmental factors. By delving into the aging mechanism of coatings and taking effective measures to delay their aging process, we can ensure that coatings maintain stable performance over long-term use.Advanced Institute (Shenzhen) Technology Co., LtdThe research platinum brand electromagnetic protection absorbing coating has a wide range of application prospects in military and civilian fields due to its excellent performance and aging resistance. In the future, with the continuous advancement of technology and innovation of materials, we believe that electromagnetic protective absorbing coatings will usher in broader development space and richer application scenarios.
The above data is for reference only, and specific performance may vary due to production processes and product specifications.