Corrosion

What is corrosion?

• The release of oxygen

• Breakdown of a metal

Iron rust in the presence of:

• Oxygen

• Vacuum

• Moisture

• Moisture and Oxygen

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

• Zinc plating

• Nickel plating

Is this an example of corrosion?

• Yes

• No

What is the chemical nature of rust?

• iron (II) oxide

• hydrated iron (II) oxide

• iron (III) oxide

• hydrated iron(III) oxide

What conditions are required for rusting?

• water only

• oxygen only

• water and oxygen

What is oxidation?

• A reaction involving oxygen

• A reaction involving non-metals

Name the two general classifications of corrosion

• Direct chemical attack and Electrochemical attack

• Fretting corrosion and Galvanic attack.

Rusting is a special term, given to the corrosion metal is... .

• Au

• Fe

• Pt

• Ag

Rusting can be prevented by

• Alloying

• Tinning

• Galvanizing

• All of above