Question

Normally iron rusts in the presence of air and water. Then why
the water pipes used at homes are made of iron. How is iron
treated to save the pipes from rusting?
Enlist any two ways
1.
2.


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Answer 1

Answer:

the two methods are:-

1.galvanisation

2.painting/greecing

Answer 2

Answer:

(1)While playing in your building compound, you might have come across an iron barbed wire which has turned red. You might have also seen some old metallic object at home. You would realise that these objects have turned reddish, unlike their original metallic colour. This is what we call rusting of iron.

(2)Sacrificial Coatings

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. Anodic protection involves coating the iron alloy steel with a less active metal, such as tin. ...

Passivation.

Explanation:

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