Consider the following statements regarding electrochemical corrosion:
- The presence of moisture or electrolyte can accelerate the corrosion process.
- The purer the metal, the greater the chance of corrosion.
- Galvanic corrosion can occur when two dissimilar metals are in contact with each other.
Which of the above statements are correct?
Correct answer: C
Explanation
Moisture or an electrolyte speeds up corrosion by completing the electrochemical circuit, so statement 1 is correct, and galvanic corrosion does occur when two dissimilar metals touch, so statement 3 is correct. Statement 2 is wrong because a purer metal resists corrosion better, while impurities set up local cells that worsen it.