Question

what do you understand by corroison? write any two methods of reduce corroison of iron?
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Answer 1

Answer:

Corrosion can be defined as the process through which refined metals are converted into more stable compounds such as metal oxides, metal sulfides, or metal hydroxides. The rusting of iron involves the formation of iron oxides via the action of atmospheric moisture and oxygen.

examples:-.

Cathodic Protection. The most common example of cathodic protection is the coating of iron alloy steel with zinc, a process known as galvanizing. ...

Anodic Protection.

Answer 2

$\huge\bf{Answer :}$

${\bigstar}$Corrosion: 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 corrosion.

• Corrosion of iron is a continuous process in which air and water eat up whole iron.

• It is also named rusting.

• Air (presence of oxygen) and Water (presence of moisture) are necessary for the corrosion.

${\bigstar}$ Equation of corrosion in iron:

• $\bf{4Fe +3O_2 + 2xH_2O \longrightarrow 2Fe_2O_3xH_2O}$

${\bigstar}$ 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.

${\bigstar}$ Example:

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

${\bigstar}$ 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.