The three methods of preventing rusting of iron are coating, and method.

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Concept- The three methods of preventing rusting of iron are coating, galvanization and electrochemical methods. All iron items, including structures, bridges, ships, and other machinery, suffer severe damage from rusting. Therefore, it is crucial to keep iron from rusting. In addition to saving money, it aids in avoiding accidents like bridge collapses or the breakdown of a crucial component due to rust.
This can be done by the following various methods:
Coatings: To stop corrosion, a variety of coatings can be put to the exposed metal's surface, such as iron in the case of rusting. Paints, wax tapes, and varnish are common instances of coatings that stop corrosion.
Galvanization: This is the process of coating iron metal with a protective layer of zinc. Due to its higher position in the reactivity series than iron, zinc is more reactive than iron (recall the reactivity series of metals). It is a widely used technique for protecting iron from rusting.
The electrochemical approach, also known as cathodic protection, involves converting iron into a cathode for a galvanic cell. An electrode made of a more reactive metal, such as magnesium, is attached to iron.
Hence, the answer is Galvanization and Electrochemical methods.

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