Corrosion prevention properties of cable pastes (red lead paste, calcium plumbate paste and aluminium phosphate paste) are investigated. Moisture permeability of the pastes is two-hundredth of that with no paste. The effects of these pastes on galvanized wire are compared by salt spray test and immersion test contacting with degradation paste. Aluminium phosphate paste has good corrosion control, but red lead paste and calcium plumbate paste are not good with metal lead in the corrosion product. Inhibitor of paste-components affects corrosion prevention ability, and those with neutral property and without electrical positive metal such as lead are better.
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