PROBLEM
Short Brothers Limited Technical Group wanted to test the effectiveness of VpCI®-337 as a universal corrosion preventative for most metals, including aluminum. They evaluated VpCI®-337 for use on components, sheets, stacks, and coils stored in-house. They also wanted to find out if VpCI®-337 would contaminate metal parts.
APPLICATION
Short Brothers tested VpCI®-337 in four different environments: a) hot and humid, b) acid (positioned near pretreatment phosphoric and chromic acid anodizing solutions), c) ambient (room temperature), and d) cold and dry. They fogged four stacks of three 4” x 4” (10 cm x 10 cm) light gauge aluminum alloy plates with VpCI®-337 spray. Also four stacks without VpCI®-337 were placed in the environments as controls. They examined the plates periodically over three months.
CONCLUSION
VpCI®-337 provided corrosion protection despite harsh conditions. In environments a, c, and d, observations showed no deterioration due to corrosive attack in either the test stacks or control specimens. In the acid environments, the control stacks suffered severe corrosive attack. Although near pretreatment phosphoric and chromic anodizing solutions, the stack treated with Cortec® VpCI®-337 showed only some initial pitting on the top plate. In the contamination tests, each sample exceeded expectations. Pretreatment completely removed Cortec® VpCI®-337, probably during the vapor degreasing operation.
PRODUCTS
CorrVerter®
VpCI®-337
