Corrosion
| Formula / Notation | Fe → Fe²⁺ + 2e⁻; O₂ + 2H₂O + 4e⁻ → 4OH⁻ |
|---|---|
| Also Known As | Rusting (iron), oxidative degradation, electrochemical corrosion, galvanic corrosion |
What is Corrosion?
Corrosion is the gradual destruction of a material (usually a metal) by chemical reaction with its environment, particularly oxidation by oxygen and moisture. The most familiar example is rusting of iron. Electrochemically, corrosion involves oxidation of the metal (anode) and reduction of oxygen or hydrogen ions (cathode). Prevention methods include galvanising, painting, and cathodic protection.
Formula & Notation
Other Names / Synonyms: Rusting (iron), oxidative degradation, electrochemical corrosion, galvanic corrosion
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Corrosion is the gradual destruction of a material (usually a metal) by chemical reaction with its environment, particularly oxidation by oxygen and moisture. The most familiar example is rusting of iron. Electrochemically, corrosion involves oxidation of the metal (anode) and reduction of oxygen or hydrogen ions (cathode). Prevention methods include galvanising, painting, and cathodic protection.
Understanding corrosion is essential for infrastructure maintenance, materials selection in chemical engineering, marine technology, and medical implant design. Corrosion science drives development of stainless steels, protective coatings, inhibitors, and cathodic protection systems.
Corroded structural components can fail catastrophically. Corrosion byproducts (metal oxides, salts) may be toxic. Corrosion inhibitors (chromates, nitrites) are often toxic or carcinogenic. Assess environmental impact of corrosion inhibitor use, particularly in water systems.
The formula or notation for Corrosion is: Fe → Fe²⁺ + 2e⁻; O₂ + 2H₂O + 4e⁻ → 4OH⁻