친환경 화력 발전용 Fe-2.25Cr-1.6W 강의 고온 부식특성 연구

• 영문명: Study of High-Temperature Corrosion Characteristics Fe-2.25Cr-1.6W Steel for Eco-friendly Power Plants
• 발행기관: 한국환경에너지공학회
• 저자명: 김민지(Min-Ji Kim) 홍서연(Seo-Yeon Hong) 송기혁(Ki-Hyeok Song)
• 간행물 정보: 『환경에너지공학』제16권 제2호, 19~26쪽, 전체 8쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2021.12.31

영문 초록

To evaluate the corrosion mechanism of Fe-2.25Cr-1.6W(wt.%) steels were corroded between 600 and 800 ℃ for up to 200 h in Na2SO4. Corrosion rates increased progressively as the corrosion time increased. The formed outer scale grew into the air by the salt during corrosion, which facilitated outward diffusion of Fe2+ ions. The inner mixed layer grew by the inward diffusion of oxygen ions. The Fe-2.25Cr-1.6W(wt.%) steel corroded little fast, forming thick scales that consisted primarily of an outer and middle Fe-O layer and an inner (Fe, Cr, O)-mixed layer. At the interface of the outer and inner scales, voids developed and cracking occurred. Fe-2.25Cr-1.6W(wt.%) steel had a small amount of Cr, which cannot decreased the scaling rate and the adhesion of scale.

목차

1. 서 론

2. 실험 방법

3. 실험 결과

4. 결론 및 고찰

키워드

Eco-friendly Power Plants High-temperature corrosion Oxidation Hot corrosion Na2SO4