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RISS 인기검색어
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- 저자 : 민심근 ( Sim Kun Min ) (검색결과 2 건)
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침염시킨 철기 유물 표면 위에 형성된 부식 생성물과 탈염처리에 대한 연구
민심근(Sim-Kun Min),이재형(Jae Hyung Lee),이재봉(Jae-Bong Lee),안병찬(Byeong-Chan An) 한국표면공학회 2007 한국표면공학회지 Vol.40 No.1
Excavated archaeological iron artifacts are usually conducted the conservation treatment for removal of chloride ions in the corrosion products. However, some iron artifacts are corroded again even after the conservation treatment due to unremoved chloride ions. Therefore, it is important to prevent desalinized artifacts from the occurrence of corrosion after the treatment. In this paper, we investigated the characteristics of corrosion products on salinized iron artifacts and evaluated the variety of desalination methods such as autoclave, intensive washing and NaOH. It was also found that β-FeOOH (Akaganeite) played an important role on the occurrence of corrosion and the treatment for removal of chloride ions. The extents of desalination were compared between the desalination methods. Results showed that the auto-clave method represented the highest efficiency for desalination while the intensive washing method was the lowest.
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전기화학적 방법을 이용한 스테인리스강의 공식 및 틈부식 저항성 측정
이재봉 ( Jae Bong Lee ),민심근 ( Sim Kun Min ) 대한금속재료학회 ( 구 대한금속학회 ) 2007 대한금속·재료학회지 Vol.45 No.5
The resistance to pitting and crevice corrosion of various stainless steels was evaluated by measuring critical pitting temperature (CPT), critical crevice temperature (CCT) and critical crevice potential (CCP). CPT values obtained from immersion test were compared with those done by electrochemical test methods. The relationship between CPT and CCT was investigated in terms of PREN (pitting resistance equivalent index). The effect of types of crevice formers on CCT was examined. CCP values for different stainless steels were measured and compared with their CCT values. The properties of passive film obtained by capacitance and abrading electrode measurements were compared with the resistance to corrosion. Results show that CCP and CCT increased with increasing PREN, indicating the linear relationship between CPT and CCT values. Independent of types of crevice former such as block or washer, CCT showed the same values in both cases. The correlation between CCT and CCP showed that CCT linearly increased with increasing PREN while CCP increased up to 40 of PREN, approached the constant values above 40. The higher PREN values resulted in the lower donor density and the closer repassivation rate parameter to 1.
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