Definition - What does Temperature Lag mean?
Temperature lag is the time needed to have a certain amount of heat to totally disperse into the ground.
The Sun provides constant heat throughout the day, especially during peak hours. However, after sunset, time is needed to cool down. This is due to the fact that solar radiation is absorbed into the ground and releases infrared heat into the air.
This temperature lag is considered a major factor that influences atmospheric corrosion and corrosion in various industries like maritime.
Corrosionpedia explains Temperature Lag
Temperature is a major factor that affects corrosion. There is an increase in the rate of corrosion or any corrosive activity when there is a temperature increase. In fact, an increase of 50°F (10°C) can double corrosion rates.
Moreover, temperature lag involving metal objects can also produce changes in terms of ambient temperature brought on by a metal's heat capacity. When ambient temperature falls at night, a metal surface has the tendency to sustain its warmth more than the surrounding air.
The temperature inequalities caused by temperature lag can lead to condensation. Because moisture promotes corrosion, this is to be avoided. Thus, industries should maintain equilibrium in temperature, which helps prevent evaporation and condensation on metal surfaces. The temperature should be maintained 50-60°F (10-15°C) higher than the dew point to help prevent corrosion.