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Corrosion by Mind Map: Corrosion
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Galvanic Corrosion

Ananode and cathode


anode passes elctrons to cathode

anode corrodes

Dry Corrosion

Occurs through chemical reactions of metals or alloys with gase, at high temperatures

For example: furnaces boiler rooms or furnaces

Uniform Attack

If a metal is placed in an electrolyte, some parts will become anotic while other become cothodic

The locations of the cathode and anode will continually change, resulting in uniform corrosion.

Steel will form a uniform layer of rust under certain circumstances

Concentration cells

Occurs when there is a difference in concentration of the electrolyte

This makes part of the material an anode and another part a cathode

A good example of this is water trapped inside a car door. over time the water will seperate; with the high oxegen water at the top and low oxegen at the bottom. This casues the low oxegen

Stress Cells

Stress cells are the result in high stress in parts of a metal object

These areas of high stress become enodic, while the lower stress areas are cathodic

The stressed area will corrode quickly