The rusting iron is

Correct option is B

The correct answer is:(b) Oxidation corrosion

• Rusting of iron is primarily an oxidation process where iron reacts with oxygen in the presence of moisture.

• It involves the oxidation of iron to iron oxide (rust), which is a hydrated form of iron oxide.

• Although moisture (water) accelerates rusting, the fundamental chemical process is oxidation.

• Therefore, rusting is a type of oxidation corrosion.

• Rusting is caused by oxidation of iron in the presence of oxygen.

• Water acts as a medium facilitating the oxidation process.

• Rust (iron oxide) is porous and flaky, exposing more iron to oxidation.

• Oxidation corrosion can occur even in the absence of water but at a much slower rate.

• Other forms of corrosion involve different chemical agents (e.g., acids, salts).

• Protective coatings like paint and galvanization prevent oxidation.

• Liquid metal corrosion (Option a): Corrosion involving interaction between solid and liquid metals, not applicable to rusting.

• Corrosion by other gases (Option c): Involves gases like sulfur dioxide, not the main cause of rusting.

• Wet corrosion (Option d): Rusting involves moisture, but the fundamental cause is oxidation.