Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Electrochemical Analysis on Flow-Accelerated Corrosion Behavior of SA106 Gr.C Steel in Alkaline Solution

  • Kim, Jun Hwan (Department of Nuclear Engineering, Korea Advanced institute of Science and Technology) ;
  • Kim, In Sup (Department of Nuclear Engineering, Korea Advanced institute of Science and Technology) ;
  • Chung, Han Sub (Korea Electric Power Research institute)
  • Published : 2003.02.01
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Abstract

Flow-Accelerated Corrosion behavior concerning both activation and mass transfer process of SA106 Gr.C steel was studied using rotating cylinder electrode in room temperature alkaline solution by DC and AC electrochemical techniques. Passive film was tanned from pH 9.8 by step oxidation of ferrous product into hydroxyl compound. Corrosion potential shifted slightly upward with rotating velocity through the diffusion of cathodic species. Corrosion current density increased with rotating velocity in pH 6.98, while it soon saturated from 1000 rpm at above pH 9.8. On the other hand the limiting current increased with rotating speed regardless of pH values. It seems that activation process, which represents formation of passive film on the bare metal surface, controls the entire corrosion kinetics

Keywords

Acknowledgement

Supported by : Korea Electric Power Research Institute

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