Question

It is the process in which iron metals are slowly eaten away by the action of air and moisture present in the air is called ________.

What is it? ​

Answer 1

Answer:

rusting

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Answer 2

$\qquad$☀️It is the process in which iron metals are slowly eaten away by the action of air and moisture present in the air is called $\sf\underline{\red{ \leadsto Corrosion}}$

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$\qquad$❏ Corrosion of iron is a continuous process in which air and water eat up whole iron. It is also named rusting.

$\qquad$❏ Air (presence of oxygen) and Water (presence of moisture) are necessary for the corrosion.

$\qquad$❏ Equation of corrosion in iron:

$\sf\pink{{4Fe +3O_2 + 2xH_2O \longrightarrow 2Fe_2O_3xH_2O}}$

$\qquad$❏ Following methods of reducing corrosion of iron:

• By applying paint
• Electroplating
• By applying greasing and oil
• Galvanization
• Using corrosion Inhibitor
• Alloying
• By tin plating and chromium plating.

$\qquad$❏ Examples:

• The blackish coating on Silver.
• The green coating on copper.
• The reddish-brown coating on iron.

$\qquad$❏ Effects of corrosion:

• Corrosion causes damage to the car, bridges, ships, and all the objects made of metals.

• It weakens the metals objects.

• It is a wasteful process. Tons of metals get wasted in the country.

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