본문 바로가기
  • Home

Exploring corrosion inhibitor of carbon steel SA 106 GR.B for chemical decontamination treatment

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(4), pp.1659~1666
  • DOI : 10.1007/s42823-025-00881-y
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : October 20, 2024
  • Accepted : February 7, 2025
  • Published : December 11, 2025

Asghar Kamal 1 Asghar Kamal 2 Ngulimi Miguta Faustine 1 Seo Bum Kyoung 1 Roh Changhyun 1

1한국원자력연구원
2

Accredited

ABSTRACT

During the operation of Pressurized Heavy Water Reactor (PHWR), corrosion oxide layers are formed on the surface of carbon steel SA 106 Grade B (GR.B), primary coolant system material. These oxide layers can be effectively removed using the common chemical decontaminant, oxalic acid (OA). However, the base metal of the structural material may also undergo corrosion, increasing the concentration of metal ions, such as ferrous ions, in the decontamination solution. The increased concentration of metal ions leads to an increased use of cation exchange resins in wastewater treatment, thereby increasing the amount of secondary wastes. Therefore, minimizing the corrosion of the base metal during chemical decontamination is crucial. In this study, imidazole (IM) and 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) were selected for their effectiveness in reducing carbon steel corrosion in acidic environments. Their efficiency as corrosion inhibitors was evaluated under actual decontamination conditions in OA solution. When [BMIM]Cl was added to OA, the corrosion depth of carbon steel decreased from 0.641 µm to 0.406 µm, and the corrosion rate decreased from 1.924 µm/h to 1.218 µm/h, both representing a reduction of 36.7%. In conclusion, this study suggests that [BMIM]Cl is a good candidate as a corrosion inhibitor to be further evaluated under chemical decontamination process.

Citation status

* References for papers published after 2024 are currently being built.