Question

Mention the factors that cause rusting of iron.

Answer 1

Answer:

Water and air are the biggest factor.

Answer 2

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• Moisture: The corrosion of iron is limited to the availability of water in the environment. Exposure to rains is the most common reason for rusting.
• Acid: if the pH of the environment surrounding the metal is low, the rusting process is quickened. The rusting of iron speeds up when it is exposed to acid rains. Higher pH inhibits the corrosion of iron.
• Salt: Iron tends to rust faster in the sea, due to the presence of various salts. Saltwater contains many ions that speed up the rusting process via electrochemical reactions.
• Impurity: Pure iron tends to rust more slowly when compared to iron containing a mixture of metals.