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| 題名: | Microstructures of Al7.5Cr22.5Fe35Mn20Ni15 High-Entropy Alloy and Its Polarization Behaviors in Sulfuric Acid, Nitric Acid and Hydrochloric Acid Solutions |
| 作者: | Tsau, CH (Tsau, Chun-Huei)
Lee, PY (Lee, Po-Yen) |
| 貢獻者: | 化材所 |
| 關鍵詞: | Al7.5Cr22.5Fe35Mn20Ni15 alloy
high-entropy alloy
microstructure polarization curve
sulfuric acid
nitric acid
hydrochloric acid |
| 日期: | 2016-08 |
| 上傳時間: | 2017-04-12 09:06:23 (UTC+8) |
| 摘要: | This paper investigates the microstructures and the polarization behaviors of Al7.5Cr22.5Fe35Mn20Ni15 high-entropy alloy in 1M (1 mol/L) deaerated sulfuric acid (H2SO4), nitric acid (HNO3), and hydrochloric acid (HCl) solutions at temperatures of 30-60 degrees C. The three phases of the Al7.5Cr22.5Fe35Mn20Ni15 high-entropy alloy are body-centered cubic (BCC) dendrites, face-centered cubic (FCC) interdendrites, and ordered BCC precipitates uniformly dispersed in the BCC dendrites. The different phases were corroded in different acidic solutions. The passivation regions of the Al7.5Cr22.5Fe35Mn20Ni15 alloy are divided into three and two sub-regions in the solutions of H2SO4 and HNO3 at 30-60 degrees C, respectively. The passivation region of the Al7.5Cr22.5Fe35Mn20Ni15 alloy is also divided into two sub-domains in 1M deaerated HCl solution at 30 degrees C. The Al7.5Cr22.5Fe35Mn20Ni15 alloy has almost equal corrosion resistance in comparison with 304 stainless steel (304SS) in both the 1M H2SO4 and 1M HCl solutions. The polarization behaviors indicated that the Al7.5Cr22.5Fe35Mn20Ni15 alloy possessed much better corrosion resistance than 304SS in 1M HNO3 solution. However, in 1M NaCl solution, the corrosion resistance of the Al7.5Cr22.5Fe35Mn20Ni15 alloy was less than 304SS. |
| 關聯: | ENTROPY 卷: 18 期: 8 文獻號碼: 288 |
| 顯示於類別: | [化學工程與材料工程學系暨碩士班] 期刊論文
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