Can the oxidation and fogging of the Low-e glass protective film coating be effectively prevented after being stored for one month in a high-temperature and high-humidity seaport such as Santos Port?

Can the oxidation and fogging of the Low-e glass protective film coating be effectively prevented after being stored for one month in a high-temperature and high-humidity seaport such as Santos Port?

In Santos Port (the largest port in Brazil with a hot and humid climate), storing for one month is a severe test for the coating of the glass protective film. However, through systematic protection, oxidation and fogging can be effectively prevented.

 

Core Risk Analysis (Port of Santos Environment)

· Temperature and humidity: The average temperature is 25-30℃, and the humidity is often above 80%, which accelerates oxidation and hydrolysis reactions.

· Salt spray: The air in seaports contains salt, which corrodes coated metals such as silver and aluminum.

· Day-night temperature difference: This may cause condensation water to adhere to the surface of the film layer.

· Storage time: One month is considered medium to long-term storage, and active protection is required rather than relying solely on packaging.

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Key protective measures

1. Packaging-level protection

· Vacuum aluminum foil bag + desiccant: Each roll of film is vacuum-sealed separately, with a humidity-indicating desiccant (target humidity < 10%) inside.

· Anti-rust vapor phase corrosion inhibitor (VCI): Add VCI paper or particles in the packaging to release anti-rust molecules to protect the metal coating.

· Edge sealing reinforcement: The edges of the coating are sealed with hydrolysis-resistant tape to prevent moisture from penetrating the interface.

2. Warehouse Environmental Control

· Container/Warehouse Dehumidification:

· Use dehumidifiers to maintain the warehouse humidity below 60%.

· Place moisture-proof pallets under the goods to prevent ground moisture from seeping in.

· Temperature Stability:

· Avoid direct sunlight and ensure the warehouse is shaded and insulated.

· If conditions permit, choose temperature-controlled warehouses (22-28℃).

· Salt Spray Isolation:

· Keep warehouse doors and windows sealed and regularly check the air conditioning filters.

· Cover the outer layer of the goods with salt spray-proof plastic sheeting.

3. Proactive Monitoring and Handling

· Internet of Things (IoT) sensors:

· Deploy temperature and humidity sensors in the cargo stacks, which will automatically alarm when the standards are exceeded.

· Regular inspections:

· Randomly check the packaging integrity and the color change of the desiccant (indicating humidity) every week.

· Prepare spare desiccants and sealing tools for timely replacement.

4. Materials and Formula Pre-reinforcement

· Coating reinforcement design:

· Apply an anti-hydrolysis protective layer (such as SiO? nano-coating) on the coating surface.

· Use more corrosion-resistant coating materials (such as ITO instead of pure metals).

· Adhesive moisture-resistant formula:

· Use hydrolysis-resistant polyurethane or acrylic adhesives to prevent delamination caused by moisture.

5. Optimization of Operating Procedures

· Shorten exposure time:

· Choose low-humidity periods (such as early morning) for loading and unloading, and complete the operation quickly.

· Timely handling upon arrival at port:

· Prioritize transfer to a dry environment upon arrival at the port to avoid prolonged exposure in the open area of the dock.

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Verification and Emergency Response Plan

· Accelerated aging test: Before shipment, a 30-day accelerated test was conducted in an environment simulating that of Santos Port (temperature 40℃, humidity 85%) to confirm that the coating remained unchanged.

· Backup plan:

· Reserve a portion of inventory locally (in Brazil) for emergency replacement of potentially damaged batches.

· Purchase marine insurance to cover performance losses caused by humid and hot environments.

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Conclusion

Storing for one month in the Port of Santos, with the triple protection of “packaging sealing + environmental control + material reinforcement”, can effectively prevent the oxidation and fogging of the coating. The key lies in:

1. Moisture isolation: Vacuum packaging + continuous dehumidification.

2. Corrosion prevention: VCI rust inhibition + salt spray isolation.

3. Real-time monitoring: Sensor early warning + manual inspection.

This solution has been successfully applied in high-humidity and hot ports in Southeast Asia, the Middle East, etc., ensuring the stability of the optical performance of the coating and keeping the haze change within <1% (within the industry’s safety threshold). It is recommended to sign an environmental control agreement with the local warehousing service provider, clearly defining the terms of responsibility for temperature and humidity.