Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Adsorption behaviour of film-forming amine on pre-oxidized carbon steel surface

  • Genxian, Lin (Suzhou Nuclear Power Research Institute Co., Ltd.) ;
  • Yun, Sun (Suzhou Nuclear Power Research Institute Co., Ltd.) ;
  • Canshuai, Liu (Suzhou Nuclear Power Research Institute Co., Ltd.) ;
  • Jun, Fang (Suzhou Nuclear Power Research Institute Co., Ltd.) ;
  • Lijun, Song (Suzhou Nuclear Power Research Institute Co., Ltd.) ;
  • Bin, Liu (Suzhou Nuclear Power Research Institute Co., Ltd.)
  • Received : 2021.08.22
  • Accepted : 2021.10.18
  • Published : 2022.04.25
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Abstract

The maintenance of condenser main pipe is the key to achieve film-forming amine maintenance effectiveness. In this work, oxygen content, pH and temperature of the solution were controlled to simulate the condition of condenser main pipe, and magnetite coated carbon steel sample was prepared by pre-oxidization. CAM was used to characterize the hydrophobicity of film formed samples. Hydrophobic film was formed on pre-oxidized carbon steel samples when octadecylamine concentration reaches 20 mg/kg. SEM, EDS, EIS, and PD were used to characterize the influence of octadecylamine concentration on maintenance effectiveness. It was found that the maintenance effectiveness was enhanced and the corrosion rate was suppressed with the increase of octadecylamine concentration. FIB and TEM were used to detect the adsorbed octadecylamine film thickness founding that octadecylamine adsorbed onto the surface of pre-oxidized carbon steel by multi-layer adsorption mechanism.

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References

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