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현광룡 한국마린엔지니어링학회 2023 한국마린엔지니어링학회지 Vol.47 No.2
Solution plasma processes (SPP) have recently attracted significant attention for the synthesis of heterocarbon nanomaterials (HCNs). However, to date, very few studies have reported the control of HCNs structures using SPP. Therefore, the factors affecting the structure of HCNs were investigated using a precursor with a similar molecular structure. In this study, powder X-ray diffraction and Raman spectroscopy results revealed that the nitrogen conjugation in the cyanopyrazine molecular structure could lead to facile crystalline carbon formation compared to the pyrazine precursor.
원자로 냉각재 펌프용 STS 304와 STS 415의 초음파-화학제염 공정 시 부식 손상 거동
현광룡(Koangyong Hyun),박재철(Jae-Cheul Park),한민수(Min-Su Han),김성종(Seong-Jong Kim) 한국표면공학회 2018 한국표면공학회지 Vol.51 No.4
In this study, we proposed a new ultrasonic-chemical decontamination process for decontaminating radioactive corrosion products during the maintenance of reactor coolant pump (RCP). The actual decontamination process was reproduced in the laboratory. And the corrosion characteristics of stainless steel (STS), constituting the RCP interior parts, were examined. The weight-loss measurment and polarization experiment were carried out in order to determine the corrosion characteristics of STS 304 and STS 415 by repeated decontamination processes. The STS 304 presented a little corrosion damage, which was almost indistinguishable from visual observation. The weight-loss rate of STS 304 was also significantly lower. On the other hand, STS 415 showed severe corrosion damage on its surface, greater weight-loss rate and higher corrosion current density than STS 304.