Corrosion of carbon steel with NaCl coating in an atmosphere produced by burning emulsified diesel oil

The high-temperature corrosion of boiler material (SB450) in a combustion furnace at 750 and 850 °C was studied using carbon steel with 2 mg cm−2 NaCl coating. The atmosphere in this furnace was produced by burning ASTM 2D diesel oil or an emulsion thereof with 10% water. The experimental results indicate that both the higher temperature and the water vapor in the atmosphere promoted metal loss. The metal loss of SB450 in the atmosphere that contained water vapor, resulting from the burning of emulsified oil, was larger than that obtained by burning just the diesel oil. Moreover, water vapor contributed to higher SO2 concentrations in the gas produced. Therefore, SB450 suffers sulfidation more seriously in an atmosphere that contains water vapor than in one obtained by burning diesel oil; it thus deteriorates more rapidly.