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A Study on Local Conditions in Amine Solutions Influencing on Corrosion of Carbon Steel

탄소강의 부식에 미치는 아민계 용액의 조건에 관한 연구

  • Received : 2011.03.21
  • Accepted : 2011.06.09
  • Published : 2011.06.30

Abstract

This research is aimed for the better understanding of corrosion behavior of carbon steel in ETA or $NH_3$ solution at high temperature. To minimize the corrosion it is important to select proper pH control agent(s), which also let it maintain basic or reductive environment inside the steel pipe. This work will provide the practical guideline which can be applied to the nuclear power plant for developing the life extension method of carbon steel. Experiments were carried out by measuring the corrosion rate using the potentiodynamic polarization curve of carbon steel in ETA and NH3 at different temperatures. The corrosion rate was estimated by using the Tafel curve measured under various test conditions: i) $NH_3$ is less than ETA as a pH agent. ii) the corrosion was reduced at high pH, and iii) the corrosion was maximum in the temperature range of $150\sim200^{\circ}C$.

Keywords

pH agent;$NH_3$;ETA;Corrosion;Carbon steel

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Acknowledgement

Supported by : 한국에너지 기술평가원(KETEP)