Corrosion Prevention

What is corrosion?

• The release of oxygen
• Breakdown of a metal

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

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

• Bad appearance
• Maintenance cost
• Clean product
• Plant shutdown

Iron rust in the presence of:

• Vacuum
• Moisture
• Oxygen
• Moisture and Oxygen

Is this an example of corrosion?

• Yes
• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the chemical nature of rust?

• iron (II) oxide

• hydrated iron (II) oxide

• iron (III) oxide

• hydrated iron(III) oxide

To protect iron against corrosion, the most durable metal plating on it, is:

• Zinc plating
• Nickel plating

Which diagram shows the most favourable conditions for rust to appear on the nail?

• A

• B

• C

• D

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-2

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

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