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논문 기본 정보

자료유형
학술저널
저자정보
Yoon-Hwa Lee (Changwon National University) Jun-Seob Lee (Changwon National University) Soon il Kwon (SeAH CSS corporation) Jungho Shin (SeAH CSS corporation) Je-Hyun Lee (Changwon National University)
저널정보
한국부식방식학회 Corrosion Science and Technology CORROSION SCIENCE AND TECHNOLOGY Vol.23 No.2
발행연도
2024.4
수록면
166 - 178 (13page)
DOI
10.14773/cst.2024.23.2.166

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초록· 키워드

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The localized corrosion resistance of UNS N07718 alloy was investigated after solution heat treatment. When the alloy was heat-treated at 1050 oC for 2.5 hours, it experienced an increase in average grain diameter, a reduction in grain boundary area, and the dissolution of delta phases along grain boundaries. Additionally, primary metallic nitrides (MN) and metallic carbides (MC), enriched with either Ti or Nb, were identified and exhibited a random distribution within the microstructures. Despite the solution heat treatment, the composition, diameter, and abundance of MNs and MCs remained relatively consistent. The critical pitting temperature (CPT), as determined by the ASTM G48-C immersion test, revealed similar values of 45 oC for both treated and untreated alloys. However, a decrease in maximum pit depth and corrosion rate was observed after the solution heat treatment. The microstructural changes that occurred during the heat treatment and their potential implications were discussed to understand the influence of the solution heat treatment.

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