| 초록 |
The Supercritical Carbon Dioxide Brayton Cycle has drawn much attention due to its high efficiency and stability in the power plants. Evaluation of the corrosion behavior and mechanical properties as the essential parts of the power plant is of great importance for structural integrity assessment. In this work, a thorough review on the corrosion behavior of structural materials used in high-temperature supercritical carbon dioxide environments of the power plant is provided. The three types of the possible candidate materials are chosen to examine high-temperature thermal stability and corrosion resistance under the supercritical carbon dioxide environment: i) ferritic-martensitic steels (T92), ii) austenitic steels (304L & 316L), and iii) Ni-based alloys (Alloy 600 and 738LC). Development of weight change and corroded oxide layer of the materials is obtained as functions of time at the given elevated temperatures. The corrosion behaviors of the materials are evaluated from weight change, composition and thickness of oxide scale, and analyses of surface and cross-section morphologies. A fundamental understanding on the corrosion behavior of structural materials used in high-temperature supercritical carbon dioxide environments of the power plant will be provided. |
