請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/69205
完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李岳聯(Yueh-Lien Lee) | |
dc.contributor.author | Li-An Chen | en |
dc.contributor.author | 陳俐安 | zh_TW |
dc.date.accessioned | 2021-06-17T03:10:34Z | - |
dc.date.available | 2021-08-31 | |
dc.date.copyright | 2020-08-24 | |
dc.date.issued | 2020 | |
dc.date.submitted | 2020-08-20 | |
dc.identifier.citation | [1] Y. Ye, Q. Wang, J. Lu, C. Liu, and Y. Yang, 'High-entropy alloy: challenges and prospects,' Mater. Today, vol. 19, no. 6, pp. 349-362, 2016. [2] Z. Li, K. G. Pradeep, Y. Deng, D. Raabe, and C. C. Tasan, 'Metastable high-entropy dual-phase alloys overcome the strength–ductility trade-off,' Nature, vol. 534, no. 7606, pp. 227-230, 2016. [3] C.-W. Lu, Y.-S. Lu, Z.-H. Lai, H.-W. Yen, and Y.-L. Lee, 'Comparative corrosion behavior of Fe50Mn30Co10Cr10 dual-phase high-entropy alloy and CoCrFeMnNi high-entropy alloy in 3.5 wt% NaCl solution,' Journal of Alloys and Compounds, p. 155824, 2020. [4] A. Pardo, M. Merino, A. Coy, F. Viejo, R. Arrabal, and E. Matykina, 'Pitting corrosion behaviour of austenitic stainless steels–combining effects of Mn and Mo additions,' Corros. Sci., vol. 50, no. 6, pp. 1796-1806, 2008. [5] D. R. Gaskell, Introduction to the Thermodynamics Of Materials, 4th Edition ed. Taylor Francis. [6] D. R. Gaskell and D. E. Laughlin, Introduction to the Thermodynamics of Materials. CRC press, 2017. [7] J.-W. Yeh, 'Alloy design strategies and future trends in high-entropy alloys,' Jom, vol. 65, no. 12, pp. 1759-1771, 2013. [8] P. Gordon, 'Principles of phase diagrams in materials systems,' MCGRAW HILL, NEW YORK. 1968, 232 P, 1968. [9] 葉均蔚, '高熵合金的發展,' 華岡工程學報, no. 27, pp. 1-18, 2011. [10] Y. Zhang et al., 'Microstructures and properties of high-entropy alloys,' Progress in Materials Science, vol. 61, pp. 1-93, 2014. [11] E. Pickering and N. Jones, 'High-entropy alloys: a critical assessment of their founding principles and future prospects,' International Materials Reviews, vol. 61, no. 3, pp. 183-202, 2016. [12] E. McCafferty, 'Thermodynamics of corrosion: Pourbaix diagrams,' in Introduction to corrosion science: Springer, 2010, pp. 95-117. [13] Wikiwand. 'Pourbaix diagram for water.' https://www.wikiwand.com/en/Pourbaix_diagram#/Diagram (accessed. [14] Y. M. Tan and R. W. Revie, Heterogeneous electrode processes and localized corrosion. John Wiley Sons, 2012. [15] A.Whittemore, Electrochemical Techniques for Corrosion Measurements. 2009. [16] M. Stern, 'A method for determining corrosion rates from linear polarization data,' Corros., vol. 14, no. 9, pp. 60-64, 1958. [17] Gamry Instruments, 'Gamry Instruments Software,' p. 9, 9.30 2005. [Online]. Available: https://mmrc.caltech.edu/Gamry/manuals/Tutorials%20and%20Primers.pdf. [18] L. Song and M. Elimelech, 'Theory of concentration polarization in crossflow filtration,' J. Chem. Soc., Faraday Trans., vol. 91, no. 19, pp. 3389-3398, 1995. [19] S. Paul, 'Materials and electrochemistry: present and future battery,' J. Electrochem. Sci. Technol., vol. 7, no. 2, pp. 115-131, 2016. [20] F. Mansfeld, 'The polarization resistance technique for measuring corrosion currents,' in Advances in corrosion science and technology: Springer, 1976, pp. 163-262. [21] E. McCafferty, Introduction to corrosion science. Springer Science Business Media, 2010. [22] D. A. Jones, Principles and Prevention of Corrosion. Prentic Hall, 1996. [23] N. Perez, Electrochemistry and Corrosion Science. Springer International Publishing, 2016. [24] J. M. Kolotyrkin, 'Pitting corrosion of metals,' Corros., vol. 19, no. 8, pp. 261t-268t, 1963. [25] X. Zhang, 'Galvanic corrosion,' Uhlig's Corrosion Handbook, vol. 51, p. 123, 2011. [26] Erik. 'Galvanic Series.' http://siranah.de/html/sail082c.htm (accessed. [27] H. Luo, Z. Li, and D. Raabe, 'Hydrogen enhances strength and ductility of an equiatomic high-entropy alloy,' Scientific reports, vol. 7, no. 1, pp. 1-7, 2017. [28] M. Laurent-Brocq et al., 'Insights into the phase diagram of the CrMnFeCoNi high entropy alloy,' Acta Materialia, vol. 88, pp. 355-365, 2015. [29] Y.-S. Lu, C.-W. Lu, Y.-T. Lin, H.-W. Yen, and Y.-L. Lee, 'Corrosion Behavior and Passive Film Characterization of Fe50Mn30Co10Cr10 Dual-Phase High-Entropy Alloy in Sulfuric Acid Solution,' Journal of The Electrochemical Society, vol. 167, no. 8, p. 081506, 2020. [30] K. Oh, S. Ahn, K. Eom, K. Jung, and H. Kwon, 'Observation of passive films on Fe–20Cr–xNi (x= 0, 10, 20 wt.%) alloys using TEM and Cs-corrected STEM–EELS,' Corros. Sci., vol. 79, pp. 34-40, 2014. [31] B. Zhang et al., 'Direct evidence of passive film growth on 316 stainless steel in alkaline solution,' Mater. Charact., vol. 131, pp. 168-174, 2017. [32] K. Jung, S. Ahn, Y. Kim, S. Oh, W.-H. Ryu, and H. Kwon, 'Alloy design employing high Cr concentrations for Mo-free stainless steels with enhanced corrosion resistance,' Corros. Sci., vol. 140, pp. 61-72, 2018. [33] C. Clayton and Y. Lu, 'A bipolar model of the passivity of stainless steel: the role of Mo addition,' Journal of the Electrochemical Society, vol. 133, no. 12, p. 2465, 1986. [34] A. Kocijan, D. K. Merl, and M. Jenko, 'The corrosion behaviour of austenitic and duplex stainless steels in artificial saliva with the addition of fluoride,' Corros. Sci., vol. 53, no. 2, pp. 776-783, 2011. [35] Y. Wang et al., 'Correlation between passivity breakdown and composition of passive film formed on alloy 690 studied by sputtering XPS and FIB-HRTEM,' Journal of The Electrochemical Society, vol. 166, no. 12, p. C332, 2019. [36] J. S. Jang, Y. B. Lee, C. H. Han, Y. S. Yi, and S. S. Hwang, 'Effect of Cr content on supercritical water corrosion of high Cr Alloys,' in Materials Science Forum, 2005, vol. 475: Trans Tech Publ, pp. 1483-1486. [37] S. Pommiers, J. Frayret, A. Castetbon, and M. Potin-Gautier, 'Alternative conversion coatings to chromate for the protection of magnesium alloys,' Corros. Sci., vol. 84, pp. 135-146, 2014. [38] 楊聰仁, '鎂合金非鉻系表面處理技術,' ed: 工業材料雜誌, 2001. [39] A. Hughes, R. Taylor, and B. Hinton, 'Chromate conversion coatings on 2024 Al alloy,' Surf. Interface Anal., vol. 25, no. 4, pp. 223-234, 1997. [40] P. L. Hagans and C. Haas, 'Chromate conversion coatings,' ASM handbook, vol. 5, pp. 405-411, 1994. [41] 葉信宏, 王正全, 周雅靜, 陳易聰, and 李秀文, '鎂合金表面處理製程廢料回收再利用,' 永續產 業發展雙月刊, no. 13, 2004. [42] C.-Y. Tsai, J.-S. Liu, P.-L. Chen, and C.-S. Lin, 'A two-step roll coating phosphate/molybdate passivation treatment for hot-dip galvanized steel sheet,' Corros. Sci., vol. 52, no. 10, pp. 3385-3393, 2010. [43] C.-Y. Tsai, J.-S. Liu, P.-L. Chen, and C.-S. Lin, 'Effect of Mg2+ on the microstructure and corrosion resistance of the phosphate conversion coating on hot-dip galvanized sheet steel,' Corros. Sci., vol. 52, no. 12, pp. 3907-3916, 2010. [44] N. Van Phuong, K. H. Lee, D. Chang, and S. Moon, 'Effects of Zn2+ concentration and pH on the zinc phosphate conversion coatings on AZ31 magnesium alloy,' Corros. Sci., vol. 74, pp. 314-322, 2013. [45] Y. Lee, Y. Chu, W. Li, and C. Lin, 'Effect of permanganate concentration on the formation and properties of phosphate/permanganate conversion coating on AZ31 magnesium alloy,' Corros. Sci., vol. 70, pp. 74-81, 2013. [46] L. Lingjie, L. Jinglei, Y. Shenghai, T. Yujing, Q. Jiang, and P. Fusheng, 'Formation and characterization of cerium conversion coatings on magnesium alloy,' Journal of rare earths, vol. 26, no. 3, pp. 383-387, 2008. [47] C.-S. Lin and W.-J. Li, 'Corrosion resistance of cerium-conversion coated AZ31 magnesium alloys in cerium nitrate solutions,' Materials transactions, vol. 47, no. 4, pp. 1020-1025, 2006. [48] F. Mansfeld, C. B. Breslin, A. Pardo, and F. Perez, 'Surface modification of stainless steels: green technology for corrosion protection,' Surface and coatings technology, vol. 90, no. 3, pp. 224-228, 1997. [49] J. Xu, S. Xin, P. Han, R. Ma, and M. Li, 'Cerium chemical conversion coatings for corrosion protection of stainless steels in hot seawater environments,' Mater. Corros., vol. 64, no. 7, pp. 619-624, 2013. [50] L. Yang, J. Li, X. Yu, M. Zhang, and X. Huang, 'Lanthanum-based conversion coating on Mg–8Li alloy,' Applied Surface Science, vol. 255, no. 5, pp. 2338-2341, 2008. [51] S. S. Jamali, S. E. Moulton, D. E. Tallman, Y. Zhao, J. Weber, and G. G. Wallace, 'Self-healing characteristic of praseodymium conversion coating on AZNd Mg alloy studied by scanning electrochemical microscopy,' Electrochem. Commun., vol. 76, pp. 6-9, 2017. [52] A. S. Hamdy and M. Farahat, 'Chrome-free zirconia-based protective coatings for magnesium alloys,' Surface and Coatings Technology, vol. 204, no. 16-17, pp. 2834-2840, 2010. [53] C. Lin, H. Lin, K. Lin, and W. Lai, 'Formation and properties of stannate conversion coatings on AZ61 magnesium alloys,' Corros. Sci., vol. 48, no. 1, pp. 93-109, 2006. [54] H. H. Elsentriecy, K. Azumi, and H. Konno, 'Improvement in stannate chemical conversion coatings on AZ91 D magnesium alloy using the potentiostatic technique,' Electrochimica Acta, vol. 53, no. 2, pp. 1006-1012, 2007. [55] M. Gonzalez-Nunez et al., 'A non-chromate conversion coating for magnesium alloys and magnesium-based metal matrix composites,' Corros. Sci., vol. 37, no. 11, pp. 1763-1772, 1995. [56] F. Zucchi, A. Frignani, V. Grassi, G. Trabanelli, and C. Monticelli, 'Stannate and permanganate conversion coatings on AZ31 magnesium alloy,' Corros. Sci., vol. 49, no. 12, pp. 4542-4552, 2007. [57] K. Yang, M. Ger, W. Hwu, Y. Sung, and Y. Liu, 'Study of vanadium-based chemical conversion coating on the corrosion resistance of magnesium alloy,' Materials Chemistry and Physics, vol. 101, no. 2-3, pp. 480-485, 2007. [58] 楊光絢, 宋鈺, 葛明德, and 劉豫川, '鎂合金釩酸鹽化成皮膜耐蝕性能研究,' ed: 鎂合金產業通訊, 2006. [59] X. Chen, G. Li, J. Lian, and Q. Jiang, 'An organic chromium-free conversion coating on AZ91D magnesium alloy,' Applied Surface Science, vol. 255, no. 5, pp. 2322-2328, 2008. [60] U. C. Nwaogu, C. Blawert, N. Scharnagl, W. Dietzel, and K. Kainer, 'Effects of organic acid pickling on the corrosion resistance of magnesium alloy AZ31 sheet,' Corros. Sci., vol. 52, no. 6, pp. 2143-2154, 2010. [61] C. Xiong et al., 'Preparation of phytic acid conversion coating and corrosion protection performances for steel in chlorinated simulated concrete pore solution,' Corros. Sci., vol. 139, pp. 275-288, 2018. [62] C. Lin and S. Fang, 'Formation of cerium conversion coatings on AZ31 magnesium alloys,' Journal of the Electrochemical Society, vol. 152, no. 2, p. B54, 2004. [63] W.-J. Li, Y.-H. Huang, H.-Y. Su, and C.-S. Lin, 'Adhesion and Corrosion Resistance of Cerium Conversion Coating on AZ31 Magnesium Alloy.' [64] W. Chunyu, Z. Qiang, Z. Ji, and W. Gaohui, 'Study on anticorrosive cerium conversion coating of Cf/6061Al composite surface,' Journal of Rare Earths, vol. 24, no. 1, pp. 64-67, 2006. [65] M. Arenas, C. Casado, V. Nobel-Pujol, and J. De Damborenea, 'Influence of the conversion coating on the corrosion of galvanized reinforcing steel,' Cement and Concrete Composites, vol. 28, no. 3, pp. 267-275, 2006. [66] S. Kiyota, B. Valdez, M. Stoytcheva, R. Zlatev, and J. M. Bastidas, 'Anticorrosion behavior of conversion coatings obtained from unbuffered cerium salts solutions on AA6061-T6,' Journal of Rare Earths, vol. 29, no. 10, pp. 961-968, 2011. [67] M. Hosseini, H. Ashassi-Sorkhabi, and H. A. Y. Ghiasvand, 'Corrosion protection of electro-galvanized steel by green conversion coatings,' Journal of rare Earths, vol. 25, no. 5, pp. 537-543, 2007. [68] B. Ramezanzadeh, H. Vakili, and R. Amini, 'Improved performance of cerium conversion coatings on steel with zinc phosphate post-treatment,' J. Ind. Eng. Chem., vol. 30, pp. 225-233, 2015. [69] Y. Kobayashi and Y. Fujiwara, 'Effect of SO42− on the corrosion behavior of cerium-based conversion coatings on galvanized steel,' Electrochimica Acta, vol. 51, no. 20, pp. 4236-4242, 2006. [70] T. Druffel et al., 'The role of nanoparticles in visible transparent nanocomposites,' in Nanophotonic Materials V, 2008, vol. 7030: International Society for Optics and Photonics, p. 70300F. [71] X. Yu and G. Li, 'XPS study of cerium conversion coating on the anodized 2024 aluminum alloy,' Journal of alloys and compounds, vol. 364, no. 1-2, pp. 193-198, 2004. [72] C. Wang, F. Jiang, and F. Wang, 'The characterization and corrosion resistance of cerium chemical conversion coatings for 304 stainless steel,' Corros. Sci., vol. 46, no. 1, pp. 75-89, 2004. [73] M. Ramezanzadeh, G. Bahlakeh, and B. Ramezanzadeh, 'Development of a nanostructured Ce (III)-Pr (III) film for excellently corrosion resistance improvement of epoxy/polyamide coating on carbon steel,' Journal of Alloys and Compounds, vol. 792, pp. 375-388, 2019. [74] S. Virtanen, M. Ives, G. Sproule, P. Schmuki, and M. Graham, 'A surface analytical and electrochemical study on the role of cerium in the chemical surface treatment of stainless steels,' Corros. Sci., vol. 39, no. 10-11, pp. 1897-1913, 1997. [75] D.-H. Kang, M.-I. Kim, and D.-W. Park, 'Selective oxidation of H 2 S to sulfur over CeO 2-TiO 2 catalyst,' Korean J. Chem. Eng., vol. 33, no. 3, pp. 838-843, 2016. [76] H. Ardelean, I. Frateur, and P. Marcus, 'Corrosion protection of magnesium alloys by cerium, zirconium and niobium-based conversion coatings,' Corros. Sci., vol. 50, no. 7, pp. 1907-1918, 2008. [77] J. F. Moulder, W. F. Stickle, and K. D. Bomben, Handbook of X-ray Photoelectron Spectroscopy. Eden Praire: Perkin Elmer, 1992. [78] M. Hoang, A. E. Hughes, and T. W. Turney, 'An XPS study of Ru-promotion for Co/CeO2 Fischer-Tropsch catalyst,' Applied surface science, vol. 72, no. 1, pp. 55-65, 1993. [79] S. B. Hassen, L. Bousselmi, P. Berçot, M. El Rezrazi, and E. Triki, 'XPS characterization and corrosion resistance of cerium-treated magnesium coatings,' Rare Metals, vol. 30, no. 4, p. 368, 2011. [80] G. Wu, C. Wang, Q. Zhang, and P. Kang, 'Characterization of Ce conversion coating on Gr-f/6061Al composite surface for corrosion protection,' Journal of alloys and compounds, vol. 461, no. 1-2, pp. 389-394, 2008. [81] P. Yu, S. A. Hayes, T. J. O’Keefe, M. J. O’Keefe, and J. O. Stoffer, 'The phase stability of cerium species in aqueous systems: II. The systems. Equilibrium considerations and pourbaix diagram calculations,' Journal of the Electrochemical Society, vol. 153, no. 1, p. C74, 2005. [82] Z. Han, Y. Zuo, P. Ju, Y. Tang, X. Zhao, and J. Tang, 'The preparation and characteristics of a rare earth/nano-TiO2 composite coating on aluminum alloy by brush plating,' Surface and Coatings Technology, vol. 206, no. 14, pp. 3264-3269, 2012. [83] A. Conde, M. Arenas, A. De Frutos, and J. De Damborenea, 'Effective corrosion protection of 8090 alloy by cerium conversion coatings,' Electrochimica Acta, vol. 53, no. 26, pp. 7760-7768, 2008. [84] S. A. Hayes, P. Yu, T. J. O’Keefe, M. J. O’Keefe, and J. O. Stoffer, 'The Phase Stability of Cerium Species in Aqueous Systems: I. E-pH Diagram for the System,' Journal of the Electrochemical Society, vol. 149, no. 12, p. C623, 2002. [85] F. Scholes, C. Soste, A. Hughes, S. Hardin, and P. Curtis, 'The role of hydrogen peroxide in the deposition of cerium-based conversion coatings,' Applied Surface Science, vol. 253, no. 4, pp. 1770-1780, 2006. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/69205 | - |
dc.description.abstract | Fe50Mn30Co10Cr10為一種雙相高熵合金,根據文獻說明雙相高熵合金的機械性質優於一般高熵合金,當鐵原子百分比從20%提升50%、錳原子百分比從20%提升30%時,並經過熱處理後,Fe50Mn30Co10Cr10的極限拉伸強度850MPa、斷裂率70%,其優異的機械性質應用在工程上相當廣泛,但也由於錳含量的關係,其氧化物不穩定,使其抗蝕能力無法與高熵合金媲美。為了改善Fe50Mn30Co10Cr10抗蝕性,本研究使用化成技術,此項製程技術不但快速,又能保有原始基材之特性,除此之外,硝酸亞鈰與雙氧水是本研究所使用的化成溶液配方,不僅改善鉻酸化成溶液的環保問題,在式樣的美觀上也兼具特色,綜合上述,本研究首次在Fe50Mn30Co10Cr10進行鈰酸化成表面處理,藉此達成抑制腐蝕之目的,在視覺上也擁有商品化的雛形。 本研究第一部份為監測化成溶液之參數,熵合金目前鮮少人進行化成研究,測試過繁多類型之溶液後,皆較難驅動基材反應,最終選定鈰酸鹽作為化成溶液主體,並初步以鈰酸溶液進行OCP監控以確認皮膜生長情況;第二部分,透過動電位極化曲線和交流阻抗頻譜進行電化學分析,結果顯示經過鈰酸化成的雙相高熵合金在含氯離子之腐蝕測試液中其腐蝕電位較未化成之試片明顯上升,腐蝕電流降低兩個次方量,表示其在此測試中能延緩腐蝕發生;在交流阻抗結果也顯示其皮膜電阻優於基材,此外,本實驗也進行長期監測皮膜浸泡在氯離子環境下的狀況;第三部分,為了深入了解表面形貌與化成機制,利用掃描式電子顯微鏡和X射線光電子能譜儀器分析皮膜結構與成份,再搭配穿透式電子顯微鏡觀察剖面形貌,量測出膜厚約17.91 ± 2.4 nm,同時以原子力顯微鏡之三維表面形貌來確定成核成長之表面。由於化成機制較為繁瑣,最後結合高解析X射線光電子能譜探討金黃色皮膜之化成機制,說明基材與化成溶液之關係以及溫度對pH值的變化。 | zh_TW |
dc.description.abstract | It was found that Fe50Mn30Co10Cr10 dual-phase high-entropy alloy (DP-HEAs) had superior mechanical properties higher than those of CoCrFeMnNi high entropy alloys (HEAs). However, poor corrosion due to the higher manganese content is one of the main challenges restricting the further application of DP-HEAs. In order to improve the corrosion resistance of DP-HEAs, a new cerium chemical conversion coating based on a mixed solution of cerium(Ⅲ) nitrate hexahydrate (Ce(NO3)3‧6 H2O) and hydrogen peroxide (H2O2) has been first proposed in this study. The electrochemical behavior of bare and coated samples was evaluated by using OCP test, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). The results showed that, from the potentiodynamic curves, the corrosion potential increases and the corrosion current density decreases by two order of magnitude for Ce-coated samples. The chemical state of the elements in the coatings was investigated by scanning electron microscope (SEM) with energy dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). The transmission electron microscope (TEM) result revealed that the thickness of cerium conversion film formed on the surface of DP-HEAs are around 17.91 ± 2.4 nm. Also, the mechanisms of golden yellow-colored cerium conversion coatings formation are discussed. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T03:10:34Z (GMT). No. of bitstreams: 1 U0001-1808202017100600.pdf: 14913005 bytes, checksum: 6e4b41e8582052298cab06aa040f7fdf (MD5) Previous issue date: 2020 | en |
dc.description.tableofcontents | 口試委員會審定書 # 誌謝 i 摘要 ii ABSTRACT iii 目錄 iv 圖目錄 vii 表目錄 x 第 1 章 前言 1 第 2 章 文獻探討 2 2.1 熵合金特性與分類 2 2.1.1 熵合金的種類 2 2.1.2 高熵合金的性質 3 2.1.3 雙相高熵合金之機械性質 3 2.1.4 雙相高熵合金之應用 5 2.2 腐蝕行為 5 2.2.1 腐蝕熱力學 5 2.2.2 腐蝕動力學 7 2.2.3 腐蝕種類 10 2.2.4 雙相高熵合金腐蝕行為 12 2.3 表面防蝕技術 19 2.3.1 陽極氧化處理 19 2.3.2 電鍍處理 19 2.3.3 無電鍍處理 20 2.3.4 化成處理 20 2.4 化成處理系統 20 2.4.1 鉻酸鹽化成處理 21 2.4.2 磷酸鹽化成處理 21 2.4.3 稀土鹽化成處理 22 2.4.4 鋯酸鹽化成處理 27 2.4.5 錫酸鹽化成處理 28 2.4.6 釩酸鹽化成處理 29 2.4.7 有機化成處理 31 第 3 章 實驗方法及步驟 33 3.1 實驗流程 33 3.2 試樣製程 34 3.3 試樣前處理 34 3.4 化成液配置 34 3.4.1 開路電位監控 36 3.5 微結構分析 37 3.5.1 表面形貌 37 3.5.2 橫截面分析 37 3.6 成分分析 38 3.7 化成皮膜抗蝕性評估 39 3.7.1 動電位極化曲線 39 3.7.2 交流阻抗分析 39 第 4 章 實驗結果 40 4.1 化成皮膜之浸泡評估 40 4.2 化成皮膜微結構之觀察 44 4.2.1 OM、SEM表面形貌觀察 44 4.2.2 EDS表面元素分析 47 4.2.3 TEM橫截面形貌觀察 49 4.2.4 AFM表面形貌之綜合比較 56 4.3 化成皮膜組成分析 58 4.3.1 AES縱深元素分析 58 4.3.2 XPS化學能譜分析 63 4.4 化成皮膜抗蝕性試驗 69 4.4.1 動電位極化分析 69 4.4.2 交流阻抗分析 71 第 5 章 討論 76 5.1 底材對不同參數化成系統之開路電位討論 76 5.2 溫度對溶液之效用 80 5.3 雙相高熵合金成核成長與化成溶液溫度之關係 82 5.4 化成皮膜縱深分析比較 83 5.5 化成機制綜合討論 87 第 6 章 結論 89 第 7 章 未來展望 91 參考文獻 92 | |
dc.language.iso | zh-TW | |
dc.title | 雙相高熵合金鈰酸鹽化成皮膜之抗蝕研究 | zh_TW |
dc.title | Cerium Conversion Coating for Corrosion Protection of Dual-Phase High-Entropy Alloy | en |
dc.type | Thesis | |
dc.date.schoolyear | 108-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 林招松(Chao-Sung Lin),顏鴻威(Hung-Wei Yen),李佳翰(Chia-Han Lee),鄭錦榮(Chin-Jung Cheng) | |
dc.subject.keyword | 雙相高熵合金,鈰酸化成,動電位極化,交流阻抗頻譜,表面分析, | zh_TW |
dc.subject.keyword | Dual-phase high-entropy alloy,Cerium conversion coating,Potentiodynamic polarization,Electrochemical impedance spectroscopy,Surface analysis, | en |
dc.relation.page | 96 | |
dc.identifier.doi | 10.6342/NTU202004001 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2020-08-20 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
顯示於系所單位: | 工程科學及海洋工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
U0001-1808202017100600.pdf 目前未授權公開取用 | 14.56 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。