Question

What is corrosion?.................. ​

Answer 1

corrosion is a oxidative reaction.

Corrosion is a natural process that converts a refined metal to a more chemically-stable form, such as its oxide, hydroxide, or sulfide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment.

Answer 2

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The surface of some metals, such as iron, is corroded when they are exposed to moist air for a long period of time. This phenomenal is called as corrosion.

Silver articles become black after sometime when exposed to air. This is because it reacts with Sulphur in the air to form a coating of silver sulphide.

Copper reacts with moist carbon dioxide in the air and slowly loses its Shiny brown surface and gains a green coat. This green substance is basic copper carbonate.

Iron when exposed to moist air for a long time acquires a coating of a brown flaky substance called rust.

PREVENTIONS :-

• Painting
• Oiling
• Greasing
• Galvanizing
• Chrome plating
• Anodising or making alloys

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