Corrosion

Question 1

What is Corrosion?

Answer 1

Corrosion is the tendency of a metal to revert to its more stable, natural state. Occurring when a metal reacts to air to form metal oxides or when it reacts with acids and alkalise to form metal salts.

Question 2

What is oxidisation?

Answer 2

It is the direct combination of a bare metal with the oxygen in the atmosphere.

Question 3

What 8 principle types of corrosion are there?

Answer 3

• Surface/Uniform Corrosion
• Fretting Corrosion
• Pitting Corrosion
• Intergranular Corrosion
• Exfoliation Corrosion
• Dissimilar metals Corrosion
• Stress Cracking
• Crevice Corrosion

Question 4

Which environments promote corrosion?

Answer 4

• Industrial Atmospheres
• Marine Atmospheres
• Tropical Climates
• Desert Areas
• Cold Climates

Question 5

What corrosion preventing coatings are there?

Answer 5

• Permanent coatings
• Supplementary Protectives
• Temporary Protectives

Question 6

What mechanical corrosion removal methods are there?

Answer 6

• Wire Brush
• Rotary Wire Brush
• Waterproof Abrasive paper
• Flap Wheels
• Nylon Flap Wheels