Class 2 (2nd Engineer) MEKG 📅 Aug 2024

Exam Question

(a) Explain electrochemical reactions and the difference between oxidation and reduction electrochemical reactions with examples. Which reactions occur at the anode and cathode? (8)

(b) Explain galvanic corrosion and discuss the different procedures to prevent it. (8)

Reference Answer

### Part (a): Electrochemical Reactions
#### Definition of Electrochemical Reactions
Electrochemical reactions are chemical processes that involve the transfer of electrons between substances, resulting in the generation or consumption of electrical energy. In the marine environment, these reactions are the fundamental mechanism behind corrosion, battery operation, and cathodic protection systems. An electrochemical cell consists of an anode, a cathode, an electrolyte, and an external metallic path for electron flow.
#### Oxidation Reaction

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