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Corrosion By Jonno and Alex by Mind Map: Corrosion By Jonno and
Alex
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Corrosion By Jonno and Alex

Dry Corrosion

No Water

High Temperature

Wet Corrosion

Uniform "attack" Corrosion

Exposed To Air

Uniform Rust Over Whole Surface

New node

Concentration Cell

Water Trapped

Difference in oxygen levels create anode and cathode

Stress Cell

When hard worked or stressed metal

Stressed area becomes anotic (anode)

Rust appears in unstressed areas

Galvanic Corrosion

Present Over 2 Dissimilar Metals

one more reactive then the other

Cathode

Reduction

(gain)

Anode

Oxidation

(loss)