Rust-Preventive Compounds,Rust-Preventive Compounds,Rust-Preventive Compounds,Rust-Preventive Compounds
RUST-PREVENTIVE COMPOUNDS are removable coatings that are used to protect the surfaces of iron, steel, coated or
galvanized products, and other alloys. Some compounds also protect nonferrous metals, such as aluminum, brass, and
copper. Coatings of these compounds should be considered temporary, because their function is to protect surfaces during
storage, handling, shipping, and fabrication. An additional application may be necessary after parts are fabricated. In
some instances, the coating may need to be removed before fabrication or assembly.
Rust-preventive compounds are a combination of basic materials, inhibitors, and specialty additives. They vary in
physical characteristics, depending on the properties required and the amount of protection needed at corrosion sites. A
corrosion cell is like a battery, which has a cathode (-), an anode (+), and an electrolyte (liquid in cells). By coating the
corrosion sites (anodes and cathodes) on a surface, rust-preventive compounds prevent contact with electrolytes, such as
oxygen and moisture-containing materials.
Constituent Materials
A rust-preventive compound can consist of only one or a combination of these four basic parts: a carrier, a film former,
polar materials, and specialty additives. For example, the rust protection offered by film formers, such as grease,
petrolatum, and low-melting-point waxes, can be enhanced by the addition of a polar material, which has an affinity for
steel and attaches to steel surfaces like a magnet.

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