Initial Stage Corrosion Behavior and Mechanism of Carbon Steel Exposed to Ozone

Because of the strong oxidizing property, ozone in the atmosphere has great disruptive effects on metal materials. The initial corrosion behaviors of carbon steel in the atmosphere with ozone were studied by setting contrast test in natural air. The corrosion appearance and products of carbon steel under different corrosion conditions were investigated by SEM/EDS and Raman, and the corrosion mechanism was studied preliminarily. The results showed that, compared with the corrosion of carbon steel in natural air, ozone can accelerate the corrosion of carbon steel, and with the extension of time, ozone can aggravate the degree of corrosion. The main corrosion products generated on the surface of carbon steel were γ-FeOOH and γ-Fe2O3, then γ-FeOOH dehydrated and bormed γ-Fe2O3 and α-Fe2O3.