Research on the Corrosive Factors of Q235 Steel in Simulate Ammonium Sulfate Solution of Ammonia Desulphurization

Abstract:

Corrosion behaviors of Q235 steel in simulate ammonium sulfate solution were studied. Effects of the ammonium sulfate concentration, Cl^- concentration, pH and the flow velocity on corrosion of Q235 steel in simulate ammonium sulfate solution were investigated by the weight-loss method, and the electrode processes were studied by polarization curves. The result showed that: (1) the corrosion rate of Q235 steel increased with the increase of Cl^- concentration firstly. When Cl^- concentration was 10000ppm, the corrosion rate reached the maximum value of 6.698 mm/a, and then, with the increase of Cl^- concentration, the corrosion rate decreased. (2)With pH increasing, the corrosion rate of Q235 steel decreased. (3)The corrosion rate increased with the increase of the concentration of ammonium sulfate firstly. When the concentration of ammonium sulfate was 5%, the corrosion rate reached the maximum value of 5.462 mm/a. And then the corrosion rate decreased. (4)The influence of the flow velocity on Q235 steel corrosion was remarkable, with the increase of the flow velocity, the corrosion rate increased rapidly.

• Periodical: Advanced Materials Research (Volumes 941-944)
• Pages: 165-168
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.941-944.165
• Online since: June 2014
• Authors: Lian He, Dong Sheng Chen, Fei Fei Lou, Qin Qin Ye, Wu Ji Wei, Yong Zhang Zhou*
• Keywords: Corrosion, Influence Factor, Q235 Steel, Simulate Ammonium Sulfate Solution

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