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나트륨-물 반응에 의한 전열관 표면에서의 부식과 반응특성에 대한 연구
정경채 ( Kyung Chai Jeong ),정지영 ( Ji Yong Jeong ),김병호 ( Byung Ho Kim ),김태준 ( Tae Joon Kim ),최종현 ( Jong Hyeun Choi ),김의식 ( Eui Sik Kim ) 한국공업화학회 2003 공업화학 Vol.14 No.1
본 연구에서는 증기발생기 전열관 재질로 예상되는 페라이트 강을 사용해서, 액체 나트륨 분위기에서 미량 물누출 실험을 수행하여, 시편의 누출 부위와 표적표면에서 발생되는 재질의 부식현상. 나트륨-물 반응에 의한 온도 상승현상 등에 대한 특성을 관찰하였다. 실험결과, 시편의 누출구멍 주변은 나트륨부위에서 나트륨-물 반응에 의해 발생되는 부식 및 침식에 의한 wastage 현상에 의해 손상을 입어 누출 구멍의 직경이 확대되었으며, 누출 부위에서의 손상은 초기 누출구멍 크기인 150㎛에서 200㎛정도로 확대되었고, 표적표면에 나타난 손상부위의 크기는 약 1000㎛ 정도로 분석되었다. 또한, 표적표면에서의 온도는 나트륨-물 반응에 의해 형성되는 반응열에 의해 약 70-80℃ 정도 상승하였으며, 손상부위 표명을 EPMA 및 EDX로 분석한 결과, 나트륨 산화물과 전열관의 모지 금속을 구성하는 Fe이나 Cr 등의 원소와 반응하여 (NaOH+Na_2O)ㆍFe_xO_y나 (NaCrO_2+Na_2Cro_4) 같은 형태의 복합산화물을 형성하는 것으로 판명되었다. In this study we observed and analyzed the corrosion phenomena in a leak site and he effect of temperature at the target surface of heat transfer tube material by sodium-water reaction through water leakage in liquid sodium atmosphere. Surrounding of the leak hole of the specimen was damaged by the wastage phenomena due to corrosion and erosion of material, and the hole size, by damage of leak site, was extended from 150㎛to about 200㎛. Also, the damaged size appeared in the target surface was observed to be about 1000㎛ diameter. The temperature of target surface increased about 70~80℃ by the heat of sodium-water reaction even with a small leakage of 15mL water. From the results of EPMA and EDX analysis, damaged areas are found to be covered with complex compounds such as (NaOH+Na_2O)·Fe_xO_y or (NaCrO_2+Na_2CrO_4) mixed up with the sodium oxides by sodium-water reaction and the Fe or Cr element by matrix of tube material.
정경채,황갑성,이동규,김의식 ( Kyung Chai Jeong,Kap Sung Hwang,Dong Kyu Lee,Eui Sik Kim ) 충북대학교 산업과학기술연구소 1996 산업과학기술연구 논문집 Vol.10 No.2
Abstract_Roman This study was investigated on the re-use feasibility of the waste ammonium carbonate solution produced in a commercial AUC (Ammonium Uranyl Carbonate) conversion plant. As powder characteristics, mean particle size of AUC powder was decre
정경채,정지영,김병호,김태준,최종현,김의식 한국공업화학회 2002 응용화학 Vol.6 No.2
In this study are observed and analyzed the corrosion phenomena in leak site and the effect on temperature at the target surface of heat transfer tube material by sodium-water reaction through small water leakage in liquid sodium atmosphere. Surrounding of leak hole of the specimen was damaged by the wastage phenomena due to corrosion and erosion of material, and the damage at the leak site was extended from 150㎛ to about 200㎛. Also, the size appeared in the target surface observed to about 1000㎛ diameter. The temperature of target surface increased about 70~80℃ by heat of sodium-water reaction in spite of the small leakage in 15㎖ of water. Also, from the results of EPMA and EDX analyses, damaged area are covered with complex compounds such as (NaOH+Na_2O) · Fe_xO_y or (NaCrO_2+Na_2CrO_4) which mixed up with the sodium oxides formed by sodium-water reaction and the Fe or Cr element composed of matrix in target material.
액체소듐속에서 소듐-물반응에 의한 재질의 Wastage현상
정경채,정지영,김병호,김태준,최병해,최종현,김의식 한국공업화학회 2003 응용화학 Vol.7 No.1
In this study we observed and analyzed the corrosion phenomena in leak site and the effect on temperature at the target surface of heat transfer tube material by sodium-water reaction through water leakage in liquid sodium atmosphere. Surrounding of leak hole of the specimen was damaged by the wastage phenomena due to corrosion and erosion of material, and hole size by damage of leak site was extended from 150㎛ to about 200㎛. Also, the damaged size appeared in the target surface was observed to about 1000㎛ diameter. The temperature of target surface increased about 70~80℃ by the heat of sodium-water reaction even with the small leakage of 15㎖ water. From the results of EPMA and EDX analysis, damaged area are found to covered with complex compounds such as (NaOH+Na_2O) FexOy or (NaCrO_2+nA_2CrO4) mixed up with the sodium oxides by sodium-water reaction and the Fe or Cr element by matrix of tube sodium oxides by matrix of tube material.