Try this product... Corrosion Block.one year I forgot and it corroded locked
Lear Chemical Research Corporation
Lear Chemical Research developing and compounding anti corrosion lubricants and greases, ACF-50, Corrosion Block, Corrosion Block Grease, Rust Block, effectively solving corrosion related problems in the Automotive, Aviation, Industrial, Marine, Motorcycle and Recreational industries.
www.learchem.com