What Is Anti-Corrosive Packaging?

Corrosion is a process in which metals react chemically or electrochemically with their environment. To prevent corrosion during transit, metals were previously coated with grease or oil, which was a costly and time-consuming process. Moreover, these methods required clean-up after the cargo reached its destination. However, the advent of anti-corrosive packaging has made it possible to provide long-term protection to metal products during transit or storage, thus preventing corrosion. As a result, the global anti-corrosive packaging market has experienced significant growth due to increasing demand from various industries, including manufacturing, construction, gas and oil, marine, and steel. The market is expected to continue growing at a rate of 6.20% between 2020 and 2027.

The term “anti-corrosion” pertains to safeguarding metal surfaces against corrosion in environments where the risk of corrosion is high.

By utilizing anti-corrosive packaging design, products can be shielded from corrosion and avoid the need for laborious and time-consuming procedures. Anti-corrosive packaging materials such as VCI bubble film, paper, oil, chips, and bags are utilized to prevent goods from being exposed to different climatic conditions. This helps to ensure that products remain in pristine condition during transportation or storage.

Furthermore, anti-corrosive packaging design is particularly useful in scenarios such as the export of goods over long distances, long-term storage of metal goods, and for metals that are prone to corrosion. Numerous companies, such as VCORR Packs Pvt. Ltd, offer a range of anti-corrosive packaging products, including VCI oils, stretch films, and biodegradable VCI films.

Methods used for Anti-Corrosive Packaging are :

• Volatile Corrosion Inhibitors (VCI) Papers and Films: These are papers or films that are treated with chemicals that release volatile compounds, which form a protective layer on metal surfaces to prevent corrosion. VCIs are commonly used in packaging materials to protect metal objects during shipping and storage.

• Aluminum barrier foil in combination with desiccants: This refers to a type of packaging that utilizes aluminum foil as a barrier to prevent moisture and oxygen from reaching the metal object inside. Desiccants are added to absorb any moisture that may have entered the package during manufacturing or transportation.

• Coating methods (oils or liquids): This method involves applying a protective coating, such as oil or liquid, to the surface of the metal object to prevent corrosion. The coating acts as a barrier between the metal surface and the environment, protecting the metal from corrosion. This method is commonly used for large metal structures or equipment that cannot be easily packaged.

Anti-corrosive Packaging can be used in the following cases :

• Exporting/shipping goods by sea or moisture prone environments: The sea and moisture-prone environments can expose metal objects to high levels of humidity, which can cause corrosion. Using appropriate anti-corrosive packaging techniques can help protect the goods from corrosion during transportation.

• Storing metallic goods for extended periods of time: Extended storage periods can lead to the accumulation of moisture, which can cause corrosion of metal objects. Using anti-corrosive packaging techniques can help prevent corrosion during storage.

• Manufacturing metal goods sensitive to corrosion: Some metal goods are sensitive to corrosion and require protection during manufacturing. Anti-corrosive packaging techniques can help prevent corrosion during the manufacturing process.

• Shipping any unassembled parts: Unassembled parts are more prone to corrosion as they may have exposed metal surfaces. Using anti-corrosive packaging techniques can help prevent corrosion during transportation.

• CKD shipment e.g. of cars: CKD shipment refers to the shipment of completely knocked down (CKD) parts of a product. Anti-corrosive packaging techniques are essential for CKD shipments of cars, as the metal parts can be exposed to moisture and corrosive environments during transportation.

• Temporarily laying of machines, planes: When machines or planes are laid off temporarily, they may be exposed to moisture and corrosive environments. Anti-corrosive packaging techniques can help prevent corrosion during temporary storage.

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Different Types Of Anti-Corrosive Packaging :

When selecting anti-corrosive packaging for cargo, it’s essential to consider factors such as the cargo type, mode of transportation, and duration of transit time. Although there are different types of anti-corrosive packaging available in the market, choosing the most suitable packaging solution for the cargo requires careful consideration of these parameters.

1. VCI Packaging: Volatile Corrosion Inhibitor (VCI) is a chemical substance that can be incorporated into various packaging materials. VCI slowly evaporates to create a thin protective layer on the metal surfaces of the packaged goods, shielding them from corrosion. VCI is effective in preventing humidity from reaching both accessible and inaccessible metal surfaces. Additionally, the vaporizing properties of the inhibitor ensure that every surface area is covered, effectively preventing corrosive reactions.
2. Desiccants: Desiccants are a popular corrosion prevention method utilized to safeguard packages from humidity and mold formation. These moisture-absorbing agents are capable of absorbing water vapor and remain insoluble in water. Desiccants are also chemically inert and able to retain their shape and size, making them an ideal solution for packaging protection. Common types of desiccants used include silica gel, aluminum silicate, alumina, blue gel, and clay.
3. Aluminum Barrier Foil: The primary purpose of aluminum barrier foil is to safeguard products from various elements such as corrosion, ultraviolet light, odors, acids, and alkalis. This type of packaging typically contains three to four layers of material. When used together with desiccants, the foil effectively absorbs moisture, protecting the cargo from corrosion. Additionally, the foil has a low water vapor transmission rate, requiring less desiccants to be used in packaging.