How to improve the anti-corrosion performance of aluminized film lamination?

To enable the aluminized film lamination to play an anti-corrosion role, it can start from aspects such as raw material selection, process control, and post-treatment. The following are the specific measures:

Raw Material Aspect

• Select high-quality aluminized film: High-quality aluminized film has better aluminum layer adhesion, uniformity, and integrity, providing a basic guarantee for anti-corrosion. For example, choose aluminized film produced by an advanced evaporation coating process. The aluminum layer of such film is closely combined with the substrate, and the situation of aluminum layer peeling off, which may lead to corrosion, is less likely to occur.
• Select appropriate lamination materials: Choose lamination materials according to the usage environment and anti-corrosion requirements. For environments that require acid and alkali resistance, polyolefin-based lamination materials with good chemical stability can be selected, such as polypropylene (PP) or polyethylene (PE). They have good resistance to many chemical substances. For occasions with higher anti-corrosion performance requirements, special lamination materials such as fluoroplastics can also be considered. For instance, polytetrafluoroethylene (PTFE) has extremely excellent corrosion resistance.

Process Control Aspect

• Optimize the aluminizing process: Precisely control various parameters during the aluminizing process, such as vacuum degree, evaporation temperature, and coating speed. An appropriate vacuum degree can ensure that the aluminum vapor is evenly deposited on the substrate to form a dense aluminum layer. Taking the evaporation coating method as an example, generally, the vacuum degree needs to reach the level of 10⁻³ Pa to 10⁻⁴ Pa to obtain a better aluminizing effect and improve the anti-corrosion performance.
• Improve the lamination process: During the lamination process, ensure that the lamination liquid is evenly coated on the surface of the aluminized film, and control the temperature, speed, and thickness of lamination well. For example, if the lamination temperature is too high, it may cause the lamination material to age and its performance to decline. If the temperature is too low, the lamination may be uneven. Usually, the lamination temperature of PE is controlled at around 250°C-300°C, and that of PP is around 280°C-320°C to ensure the quality and anti-corrosion performance of the lamination.

Post-treatment and Application Aspect

• Surface treatment: Conduct surface treatment on the aluminized film lamination, such as coating an anti-corrosion coating or an antioxidant. Methods such as chemical vapor deposition (CVD) or physical vapor deposition (PVD) can be used to form a nanoscale protective coating on the surface of the lamination to enhance its anti-corrosion ability.
• Packaging and storage: Correct packaging and storage methods can prevent the aluminized film lamination from being corroded before use. It should be stored in a dry and ventilated environment, avoiding exposure to moisture, rain, and corrosive substances. Use moisture-proof packaging materials, such as placing desiccants inside the package, which can effectively absorb the moisture in the air and prevent the erosion of water vapor on the aluminized film lamination.
• Application environment control: Try to apply the aluminized film lamination in a suitable environment, avoiding long-term exposure to harsh environments such as high humidity, high salinity, strong acids, and strong alkalis. If it is unavoidable, additional protective measures can be taken, such as adding a protective coating or conducting anti-corrosion treatment regularly.