Prevention of Rusting

Preventing Rusting

Save the iron objects from being rusted

Open Ended

why rusting speeds up if there is more humidity in air?

Open Ended

why iron nail is not being rusted when we pass electric current through it?

what do you mean by electroplating?

Open Ended

How will you explain Galvanization?

Open Ended

Sacrificial protection of rusting means we have sacrifice a cheapest metal to save an expensive metal. can you give an example of this kind of protection?

Open Ended

How will you protect the iron objects at your home?

give some examples starting from kitchen, living room, toys and bicycle, motor bike and car

Multiple Choice

Galvanizing is a process of:

• Applying a Zinc coating to bare steel

• Washing the body with the phosphate coating

• dipping a body in E-COAT

• Chemically etching primer to steel

Multiple Select

Which of the following is / are examples of sacrificial protection against rusting?

• Iron object coated with tin

• Underground iron pipes connected to magnesium bars

• Iron railings coated with paint

Multiple Choice

Which of the following is / are examples of sacrificial protection against rusting?

(1) Iron object coated with tin

(2) Underground iron pipes connected to magnesium bars

(3) Iron railings coated with paint

• (1) only

• (2) only

• (1) and (3) only

• (2) and (3) only

Multiple Choice

What is the chemical nature of rust?

• iron (II) oxide

• hydrated iron (II) oxide

• iron (III) oxide

• hydrated iron(III) oxide

Multiple Choice

Is this an example of corrosion?

• Yes

• No

Multiple Choice

Iron rust in the presence of:

• Vacuum
• Moisture
• Oxygen
• Moisture and Oxygen

Multiple Choice

Which of the following is NOT a harmful effect of corrosion?

• Bad appearance

• Maintenance cost

• Clean product

• Plant shutdown

Multiple Choice

What is an ore?

• A combination of carbon and iron

• A combination of metal and other elements

• A combination of elements and oxide

• A combination of metal and carbon

Multiple Choice

What is corrosion?

• The release of oxygen

• Breakdown of a metal