|Class 12 Chemistry Electrochemistry||Corrosion|
We all must have observed newly bought iron, silver or coper articles appears very shiny but with passage of time they get dull. This is due to the layer of metal oxide that develops on their surface. Rusting of iron, silver jewellery getting tarnished or copper articles getting covered by green layer. Metals react with atmospheric oxygen and produces metal oxides that are basic in nature because they react with water to form bases.
Fig. Iron chain left in moist air got rusted
Corrosion causes damage to car bodies, bridges, iron railings, ships and to all objects made of metals, especially those of iron.
Fig. Copper developing green coloured rust on exposure to moist air
Fig. Tarnished silver Vs polished silver