Class 2 (2nd Engineer) MEKG 📅 Nov 2022

Exam Question

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

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

Reference Answer

### Part (a): Electrochemical Reactions, Oxidation, and Reduction
#### 1. Electrochemical Reactions
An electrochemical reaction is a chemical process that involves the transfer of electrons from one substance to another, resulting in the generation or consumption of electrical energy. For such a reaction to occur, four fundamental components must be present, forming an electrochemical cell:
* **Anode:** The electrode where oxidation occurs. It is the more chemically active or less noble material, which corrodes or dissolves.

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