[논문]선박 연료배관용 St37.4 탄소강의 암모니아 농도에 따른 부식 특성

이도빈; 이승준

doi:10.14773/cst.2022.21.6.514

선박 연료배관용 St37.4 탄소강의 암모니아 농도에 따른 부식 특성
Corrosion Characteristics of St37.4 Carbon Steel for Ship Fuel Pipe with Ammonia Concentration 원문보기

Corrosion science and technology, v.21 no.6, 2022년, pp.514 - 524

이도빈 (군산대학교대학원) , 이승준 (군산대학교 마린엔지니어링전공)

Abstract ▼ AI-Helper

Carbon emissions from fuel consumption have been pointed by scientists as the cause of global warming. In particular, fossil fuels are known to emit more carbon when burned than other types of fuels. In this regard, International Maritime Organization has announced a regulation plan to reduce carbon dioxide emissions. Therefore, recently, Liquefied Natural Gas propulsion ships are responding to such carbon reduction regulation. However, from a long-term perspective, it is necessary to use carbon-free fuels such as hydrogen and ammonia. Nitrogen oxides might be generated during ammonia combustion. There is a possibility that incompletely burned ammonia is discharged. Therefore, rather than being used as a direct fuel, Ammonia is only used to reduce NOX such as urea solution in diesel vehicle Selective Catalyst Reduction. Currently, LPG vehicle fuel feed system studies have evaluated the durability of combustion injectors and fuel tanks in ammonia environment. However, few studies have been conducted to apply ammonia as a ship fuel. Therefore, this study aims to evaluate corrosion damage that might occur when ammonia is used as a propulsion fuel on ships.

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표/그림 (12)

그림 Fig. 1. Acrylic tank for immersion test of St37.4 carbon steel with ammonia concentration
표 Table 1. Mechanical characteristics and chemical compositions of St37.4 carbon steel(a) Mechanical characteristics
그림 Fig. 2. Polarization curves for Tafel analysis of St37.4 carbon steel on 0 oC solution with ammonia concentration
그림 Fig. 3. Comparison of corrosion current density(a) and corrosion rate(b) for St37.4 carbon steel on 0 °C solution with ammonia concentration
표 Table. 2. Result of Tafel analysis for St37.4 carbon steel on 0 °C solution with ammonia concentration
그림 Fig. 4. Weight gain for St37.4 carbon steel on 0 °C solution with immersion time
그림 Fig. 5. Comparison of weight gain for St37.4 carbon steel on 0 °C solution with immersion time(a) and ammonia concentration(b)
그림 Fig. 6. SEM morphologies of St37.4 carbon steel on 0 °C solution with immersion time and ammonia concentration
그림 Fig. 7. EDS analysis of St37.4 carbon steel on 0 °C solution with on ammonia concentration
그림 Fig. 7. Continued.
그림 Fig. 7. Continued.
그림 Fig. 8. Comparison of EDS analysis for St37.4 carbon steel on 0 °C solution with immersion time and ammonia concentration

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