what is means by corrosion?
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Corrosion is a chemical reaction that happens on metals due to the attack of acid, water or moisture.
Skme examples are:-
- The silver articles become black after sometime when exposed to air this is because of the presence of sulphur in air which forms a coating of sulphur sulphide on the article.
- The copper reacts with moist carbon dioxide in the air and loses its ground surface by gaining a green coat which is basic copper carbonate.
- Wheniron is exposed to moist air for a long time it acquires a coating of brown substance which we normally call as rust.
Prevention of corrosion:-
- Painting
- Oiling
- Greasing
- Galvanising
- Chrome plating
- Anodising
- Making Alloys
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