Atmospheric Corrosion

Atmospheric corrosion refers to the deterioration of metals due to reactions with environmental elements. Key aspects include:

• Oxygen Reaction: Oxygen in the atmosphere reacts with metals like iron to form oxides. For example, iron reacts with oxygen and moisture to form iron oxide, commonly known as rust.
• Moisture: Water, whether in the form of rain, humidity, or dew, accelerates corrosion by facilitating the electrochemical reactions that lead to metal degradation.
• Acid Rain: Acidic precipitation, resulting from sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) in the atmosphere, can significantly speed up corrosion. Acid rain lowers the pH of rainwater, enhancing its corrosive effects on metals.
• Salt: In coastal areas, saline (salt) air can promote corrosion through the formation of salt deposits on metal surfaces, which can draw moisture from the air and increase the rate of corrosion.
• Pollutants: Airborne pollutants such as sulfur dioxide and nitrogen oxides can contribute to the formation of acids and further accelerate corrosion processes.

Mitigation strategies include using corrosion-resistant materials, applying protective coatings, and regular maintenance to remove corrosive substances and prevent damage.