How does soil corrosion rate change with temperature?

How does soil corrosion rate change with temperature?

• A. Corrosion oscillates with temperature
• B. Temperature has no effect
• C. Corrosion decreases with temperature
• D. Corrosion increases with increase in temperature

Answer: (D)

Increasing temperature speeds up the electrochemical reactions that cause soil corrosion. The rate at which metal dissolves and the rate of the cathodic reactions both rise as temperature climbs, because reaction kinetics follow the Arrhenius principle. Warmer soil also improves ion mobility and the conductivity of the soil solution, allowing corrosive species (like oxygen and chlorides) to diffuse to the metal surface more readily and carry current more efficiently. Additionally, protective films on some metals can become less stable at higher temperatures, making corrosion easier. For these reasons, corrosion rate tends to increase with temperature. The other statements don’t align with the typical acceleration of electrochemical processes and ion transport as temperature rises.

Increasing temperature speeds up the electrochemical reactions that cause soil corrosion. The rate at which metal dissolves and the rate of the cathodic reactions both rise as temperature climbs, because reaction kinetics follow the Arrhenius principle. Warmer soil also improves ion mobility and the conductivity of the soil solution, allowing corrosive species (like oxygen and chlorides) to diffuse to the metal surface more readily and carry current more efficiently. Additionally, protective films on some metals can become less stable at higher temperatures, making corrosion easier. For these reasons, corrosion rate tends to increase with temperature. The other statements don’t align with the typical acceleration of electrochemical processes and ion transport as temperature rises.