Interaction between silty sand and temperature towards corrosion behavior of carbon steel in CO2 environment

Abstract

The interaction between silty sand and temperature towards corrosion of carbon steel in CO2 environment is investigated. The effect of silty sand is more complicated, while the effect of temperature is more remarkable. High temperature causes a more protective corrosion products layer. Silty sand physically adsorbs on the surface and embeds in the porous Fe3C layer at 40 ℃ to slightly reduce corrosion. At 80 ℃, silty sand delays FeCO3 precipitation and significantly increases the porosity of corrosion products layer, thus promoting corrosion. At 120 ℃, silty sand increases the porosity and hinders the formation of Fe3O4 to accelerate corrosion.