What should be noted before using VCI paper? Which chemical elements does it react with?

Before using VCI paper, it is necessary to first check whether its packaging and storage conditions meet the requirements, ensuring that the paper has not been affected by adverse environments such as moisture, high temperature or direct sunlight, to avoid a decrease in the activity of the VCI agent. Secondly, it is necessary to confirm the production date and validity period of the VCI paper to ensure that it is used within the validity period. In addition, the VCI paper should be in full contact with the metal surface to achieve the best VCI effect. The rust inhibitors contained in VCI paper may react with some chemical elements, especially for metals such as iron, copper and aluminum. By coming into contact with the metal surface, the rust inhibitors form a protective film, effectively blocking moisture and oxygen in the air and preventing metal oxidation and corrosion. However, VCI paper may not be suitable for certain sensitive metals, such as active metals or alloys. Special attention should be paid to its compatibility with specific metals or chemicals when using it