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Corrosion Fundamentals

Protective Coatings

Protective coatings are the most commonly used method of corrosion control. They are the subject of several sections of this web site.

Protective coatings can be metallic, such as the galvanized steel shown below, or they can be applied as a liquid "paint." Most of the research and testing of protective coatings at the Kennedy Space Center is related to paint-like protective coatings.

Galvanized and Weathering Steel

Air Conditioner Showing Rust Stains

Aluminum Airplan Wing
(Courtesy of

Filiform corrosion occurs underneath protective coatings. The air conditioner on the left is starting to show rust stains due to problems with protective coating. The same types of problems are starting to appear on the aluminum airplane wing shown on the right.

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