Question

what are the various necessary conditions for rusting name various method used to prevent rusting

Answer 1

(i) exposed metal  surface

(ii) the metal surface must come in contact with air or oxygen.

(iii) the air must contain moisture.

various methods to prevent rusting:

- by coating the surface of metals with an appropriate material so that its surface does not come in contact with air. various methods are:

A) NON-METALLIC COATING:

i by painting with enamel paints eg, iron , doors, windows ,tc

ii by enameling eg cooker stoves, refrigerators

iii by coating with red lead oxide paint or tar eg lower parts of ships or boats

iv by oils and greases eg parts of vehicles

B) METALLIC COATING:

i by galvanisation eg roof sheds, buckets

ii by tin plating eg oil, meat

iii by coating with nickel or chromium by electrolysis eg bicycles handles , rims

iv by forming alloys eg utensils, surgical instruments

HOPE ITS HELPFUL

Answer 2

• Paint it. Paint the bare metal with any durable acrylic paint.

• Avoid contact with water or moisture.

• Use of oil and grease significantly reduces the chances of developing rust in iron.

• Coating of zinc.