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

IF 5.8 3区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Sion Kim, Kamal Asghar, Miguta Faustine Ngulimi, Bum Kyoung Seo, Changhyun Roh
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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.

Abstract Image

碳钢SA 106 GR.B化学去污缓蚀剂的研究
在压水堆(PHWR)运行过程中,主冷却剂系统材料SA 106 B级碳钢(GR.B)表面形成腐蚀氧化层。这些氧化层可以使用常见的化学去污剂草酸(OA)有效地去除。然而,结构材料的贱金属也可能经受腐蚀,增加去污溶液中金属离子的浓度,如铁离子。金属离子浓度的增加导致废水处理中阳离子交换树脂的使用增加,从而增加了二次废物的数量。因此,在化学净化过程中尽量减少母材的腐蚀是至关重要的。在本研究中,选择咪唑(IM)和1-丁基-3-甲基咪唑氯([BMIM]Cl)来降低碳钢在酸性环境中的腐蚀。在OA溶液的实际去污条件下,评价了它们作为缓蚀剂的效率。当OA中加入[BMIM]Cl时,碳钢的腐蚀深度从0.641µm降低到0.406µm,腐蚀速率从1.924µm/h降低到1.218µm/h,均降低了36.7%。综上所述,本研究表明[BMIM]Cl是一种很好的缓蚀剂,值得在化学净化过程中进一步评价。
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来源期刊
Carbon Letters
Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
7.30
自引率
20.00%
发文量
118
期刊介绍: Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.
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