Question

suggest any two method to prevent corrosion

Answer 1

hey user here is your answer
As far as basic methods, there are a few. Priming and painting is probably the most common method of preventing rust, and using a primer with rust inhibiting ingredients that forms a tough, waterproof coating is a good way to protect it.
Plating, whether electroplating the steel or dipping it in a corrosion resistant metal like zinc is another method of preventing rust. Zinc coating can be applied by electroplating, or the metal can be dipped into a tank of molten zinc, which creates a barrier so that oxygen cannot react with the steel.

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Answer 2

hey!
the answer is,
*Paint the metal surface.
*Apply protective lubricant to moving metal parts.