Corrosion simulation of carbon steels in atmospheric environment

Atmospheric corrosion simulation of carbon steels has been performed in order to clarify the atmospheric corrosion mechanism of carbon steel. The corrosion simulation was conducted in a chamber by controlling the environmental factors such as temperature, relative humidity and temperature of carbon steels. When the corrosion simulation was conducted using only the data of temperature and relative humidity, although the carbon steel in the corrosion simulation showed almost the same corrosion behavior as that in outdoor environment, the corroded area of the former was smaller than that of the latter. In order to simulate dew condensation, the temperature of carbon steel was controlled by a cooling-system. As a result of the corrosion simulation, both the corrosion behavior and the corroded area were almost the same as those in outdoor environment. It was concluded that the initial atmospheric corrosion of carbon steel in the shielded environment could be simulated in the chamber by controlling the temperature, the relative humidity and the temperature of materials.