TWELVE YEAR VCI INDOOR STORAGE PROTECTION TEST.
ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIV
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The protective ability of Volatile Corrosion Inhibitor VCI materials is related to both the chemical type and amount of inhibitor present. Since these materials are volatile they can be lost from unsealed packages during storage. To investigate the effects of inhibitor loss, steel specimens were wrapped with fresh and aged VCI paper and placed in indoor storage for 12 years. At test conclusion 1 the steel specimens were examined for corrosion, 2 the VCI papers were analyzed for inhibitor content and physical properties and 3 the steel specimens were evaluated for corrosion resistance after removal from the package. Test results indicated one VCI material had provided excellent protection for 12 years. Two other papers had provided nominal protection for this period. No trace of VCI chemical was found on any of the papers. Two VCI papers met burst and tear strength requirements of MIL-P-3420 specification after test. The steel pecimens removed from the test packages corroded more rapidly in high humidity tests than did similar specimens not previously exposed to VCI. It was concluded that thorough sealing is not required for all VCI packages under indoor storage conditions when no liquid water is produced by condensation inside the package. VCI preserved items should be used or represerved immediately after removal from a package. Author
- Containers and Packaging