請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/9761
完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林招松 | |
dc.contributor.author | Yu-Ren Chu | en |
dc.contributor.author | 褚喻仁 | zh_TW |
dc.date.accessioned | 2021-05-20T20:39:48Z | - |
dc.date.available | 2008-07-30 | |
dc.date.available | 2021-05-20T20:39:48Z | - |
dc.date.copyright | 2008-07-30 | |
dc.date.issued | 2008 | |
dc.date.submitted | 2008-07-24 | |
dc.identifier.citation | 1. J. E. Gray, B. Luan, “Protective Coatings on Magnesium and Its Alloys – a Critical Review,” Journal of Alloys and Compounds, 336, 2002, p.88-113
2. W. F. Smith, Structure and Properties of Engineering Alloys, 2nd Ed., McGraw-Hill Inc., 1993, p.537-549 3. E. Ghali, W. Dietzel, and K. Kainer, “General and localized Corrosion of Magnesium alloys: A Critical Review,” Journal of Materials Engineering and Performance, 13, 2004, p.7-23 4. Y. Kojima, “Platform Science and Technology for Advanced Magnesium Alloys,” Materials Science Forum, 350-351, 2000, p.3-18 5. 蔡幸甫,“鎂合金在電子產品上的應用與產業現況',工業材料,88年八月號,p.62-71 6. 蔡幸甫,“輕金屬產業發展狀況及商機',工業材料,90年六月號,p.77-83 7. 蔡幸甫,“輕金屬產業發展現況及趨勢',工業材料,92年六月號,p.72-80 8. E. Aghion, B. Bronfin, and D. Eliezer, “The role of the magnesium industry in protecting the environment,” Journal of Materials Processing Technology, 117, 2001, p.381-385 9. 王建義,“鎂合金之環保化',工業材料,91年六月號,p.125-130 10. 蔡孟熹,“鎂鋁合金中Mg17Al12對於磷酸鹽/錳酸鹽化成處理微結構與性質的影響',台灣大學碩士論文,96年七月 11. J. H. Nordlien, S. Ono, N. Masuko, and K. Nişancioğlu, ”Morphology and Structure of Oxide Films Formed on Magnesium by Exposure to Air and Water,” Journal of The Electrochemical Society, 142(10), 1995, p.3320-3322 12. J. H. Nordlien, K. Nişancioğlu, S. Ono, and N. Masuko, ”Morphology and Structure of Oxide Films Formed on MgAl Alloys by Exposure to Air and Water,” Journal of The Electrochemical Society, 143(8), 1996, p.2564-2571 13. J. H. Nordlien, K. Nişancioğlu, S. Ono, and N. Masuko, ”Morphology and Structure of Water-Formed Oxides on Ternary MgAl Alloys,” Journal of The Electrochemical Society, 144(2), 1997, p.461-466 14. D. A. Vermilyea and C. F. Kirk, “Studies of Inhibition of Magnesium Corrosion,” Journal of The Electrochemical Society, 116(11), 1969, p.1487-1492 15. F.-H. Cao, V.-H. Len, Z. Zhang, and J.-Q. Zhang, “Corrosion Behavior of Magnesium and Its Alloy in NaCl Solution,” Russian Journal of Electrochemistry, 43(7), 2007, p.837-843 16. 李威志,“AZ31鎂合金之磷酸鹽/錳酸鹽化成皮膜微結構與成長機制探討',台灣大學碩士論文,94年七月 17. M. Pourbaix, Atlas of Electrochemical Equilibria in Aqueous Solutions, National Association of Corrosion Engineers, 1974 18. 楊聰仁,“鎂合金非鉻系表面處理技術',工業材料,90年六月號,p.97-101 19. A. Yamamoto, A. Watanabe, K. Sugahara, S. Fukumoto, and H. Tsubakino, “Deposition Coating of Magnesium Alloys with Pure Magnesium,” Materials Transactions, 42, 2001, p.1237-1242 20. Y. Liu, P. Skeldon, G. E. Thompson, H. Habazaki, and K. Shimizu, “Chromate conversion coatings on aluminium: influences of alloying,” Corrosion Science, 46, 2004, p.297-312 21. P. Campestrini, E.P.M. van Westing, A. Hovestad, and J.H.W. de Wit, “Investigation of the chromate conversion coating on Alclad 2024 aluminium alloy: effect of the pH of the chromate bath,” Electrochimica Acta, 47, 2002, p.1097-1113 22. A.A.O. Magalhães, B. Tribollet, O. R. Mattos, I.C.P. Margarit, and O. E. Barcia, “Chromate Conversion Coating Formation on Zinc Studied by Electrochemical and Electrohydrodynamical Impedances,” Journal of The Electrochemical Society, 150(1), 1969, p.B16-B25 23. K. W. Cho, V. S. Rao, and H. S. Kwon, “Microstructure and Electrochemical characterization of trivalent chromium based conversion coating on zinc,” Electrochimica Acta, 52, 2007, p.4449-4456 24. S. Ono, K. Asami, and N. Masuko, “Mechanism of Chemical Conversion Coating Film Growth on Magnesium and Magnesium Alloys,” Materials Transactions, 42, 2001, p.1225-1231 25. G. D. Wilcox, “Replacing Chromates for the Passivation of Zinc Surfaces,” Transactions of the Institute of Metal Finishing, 81(1), 2003, p.B13-B15 26. S. M. Cohen, “Review: Replacements for Chromium Pretreatments on Aluminum,” Corrosion, 51(1), 1995, p.71-78 27. M. Hosseini, H. Ashassi-Sorkhabi, H. A. Y. Ghiasvand, ”Corrosion Protection of Electro-Galvanized Steel by Green Conversion Coatings,” Journal of Rare Earth, 25, 2007, p.537-543 28. W. Zhou, D. Shan, E. Han, and W. Ke, “Structure and formation mechanism of phosphate conversion coating on die-cast AZ91D magnesium alloy,” Corrosion Science, 50, 2008, p.329-337 29. G. Li, L. Niu, J. Lian, Z. Jiang, ”A black phosphate coating for C1008 steel,” Surface and Coatings Technology, 176, 2004, p.215-221 30. L. H. Chiu, H. A. Lin, C. C. Chen, C. F. Yang, C. H. Chang, and J. C. Wu, “Effect of Aluminum Coatings on Corrosion Properties of AZ31B Magnesium Alloys,” Materials Science Forum, 419-422, 2003, p.909-914 31. D. Hwake, D. L. Albright, “A Phosphate-Permanganate Conversion Coating for Magnesium,” Metal Finishing, 93(10), 1995, p.34-38 32. H. Umehara, M. Takaya, and Y. Kojima, “An Investigation of the Structure and Corrosion Resistance of Permanganate Conversion Coatings on AZ91D Magnesium Alloy,” Materials Transactions, 42(8), 2001, p.1691-1699 33. I. Azkarate, P. Cano, A. Del Barrio, M. Insausti, and P. Santa Coloma, “Alternatives to Cr(VI) conversion coatings for magnesium alloys,” International Congress Magnesium alloys and their applications, 2000 34. K. Z. Chong, T. S. Shih, “Conversion-coating treatment for magnesium alloys by a permanganate-phosphate solution,” Materials Chemistry and Physics, 80, 2003, p.191-200 35. A. L. Rudd, C. B. Bresline, F. Mansfeld, “The corrosion protection afforded by rare earth conversion coatings applied to magnesium,” Corrosion Science, 42, 2000, p.275-288 36. M. Dabalà, K. Brunelli, E. Napolitani, and M. Magrini, ”Cerium-based chemical conversion coating on AZ63magnesium alloy,” Surface and Coatings Technology, 172, 2003, p.227-232 37. 方思凱,“AZ31鎂合金之硝酸鈰化成處理',台灣大學碩士論文,93年七月 38. C. S. Lin, H. C. Lin, K. M. Lin, and W. C. Lai, ”Formation and properties of stannate conversion coatings on AZ61 magnesium alloys,” Corrosion Science, 48, 2006, p.93-109 39. M. A. Gonzalez-Nunez, C. A. Nunez-Lopez, P. Skeldon, G. E. Thompson, H. Karimzadeh, P. Lyon, and T. E. Wilks, “A Non-Chromate Conversion Coating for Magnesium Alloys and Magnesium-Based Metal Matrix Composites,” Corrosion Science, 37(11), 1995, p.1763-1772 40. ASTM Standard, “Standard Test Methods for Measuring Adhesion by Tape Test,” D3359-02, 06.01, 2002, p.7 41. C. S. Lin, C. Y. Lee, W. C. Li, Y. S. Chen, and G. N. Fang, “Formation of Phosphate/Permanganate Conversion Coating on AZ31 Magnesium Alloy,” Journal of The Electrochemical Society , 153(3), 2006, p.B90-B96 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/9761 | - |
dc.description.abstract | 隨著鎂合金的應用日益廣泛,提升其抗蝕性成為相當重要的課題。長期以來,鎂合金之鈍化處理以鉻酸鹽處理為主,但由於鉻酸鹽對環境及人體具有毒性,已逐漸被世界各國所禁用。在許多取代鉻酸鹽的處理系統當中,本實驗針對極具潛力之磷酸鹽/錳酸鹽系統,以微結構分析技術與電化學量測方法,探討化成液pH値對化成皮膜性質影響之研究。
實驗結果發現,在pH值4.0的化成液中,皮膜呈現兩層結構,分別為與底材相接觸的多孔層,與批覆於多孔層上之柱狀層。當化成液pH値提升至5.7後,皮膜除了多孔層與柱狀層之外,還有結晶性的磷酸鹽析出物批覆其上。相較於pH值4.0下生成之皮膜,pH值5.7下所得的皮膜較薄且顏色較淺,同時具有良好的光澤度與附著性,且在極化曲線量測中表現出較低的腐蝕電流。 此外,本實驗利用厚度量測與SEM橫截面影像觀察,針對磷酸鹽/錳酸鹽化成皮膜進行動力學參數之討論。結果顯示,在pH4.0化成液中處理時,構成皮膜主體之柱狀層在完全潤濕的情形下對於底材之保護性相當有限,而抗蝕性主要來自於多孔層。提升pH值後,磷酸鹽結晶的析出可以抑制柱狀層的成長,進而降低裂紋的生成,並獲得較厚的多孔層,提升皮膜抗蝕性。 | zh_TW |
dc.description.abstract | Magnesium alloys have become a group of the most widely used materials for their outstanding mechanical properties. However, the poor corrosion resistance is a critical weakness of most magnesium alloys. Among the various surface modification treatments, chromate conversion coating has received most attention in the past decades; however, the use of hexavalent chromate is prohibited due to environmental concerns. The phosphate/permanganate system, which is more environmental friendly and has been shown to have comparable corrosion resistance as compared to the chromate counterpart, is now the developing system with most expectation.
In former researches, the pH value has been mentioned to be the key factor of the phosphate/permanganate conversion coating. Nonetheless, the pH effects on both growth behavior and coating properties are less well studied. Therefore, this study, with the aids of microstructural analyses and electrochemical measurements, aims at detailing the pH effects on the phosphate/permanganate conversion coating on AZ31 magnesium alloys. The results show that the coating formed under pH 4.0 is composed of two layers: the inner porous layer contacting the substrate, and the outer cellular layer, which shows litter protection during the conversion coating treatment. On the contrary, the coating formed under pH 5.7 is covered by crystalline struvite (MgNH4PO4•6H2O) precipitates, which seems to inhibit the formation of the cellular layer. Compared to the coating formed under pH 4.0, the thinner coating with lighter color formed under pH 5.7 shows enhanced adhesion property and better performance in corrosion test. | en |
dc.description.provenance | Made available in DSpace on 2021-05-20T20:39:48Z (GMT). No. of bitstreams: 1 ntu-97-R95527019-1.pdf: 11468131 bytes, checksum: 2e5b6449863fb94145e2bf98b84cbe5d (MD5) Previous issue date: 2008 | en |
dc.description.tableofcontents | 摘要 i
Abstract ii 總目錄 iii 圖目錄 v 表目錄 vii 符號表 viii 第1章 序論 1 第2章 文獻探討 2 2.1 鎂合金的發展與應用 2 2.1.1 鎂的性質 2 2.1.2 常用的鎂合金種類 3 2.1.3 鎂的工程應用 3 2.2 鎂合金的腐蝕行為 6 2.2.1 均勻腐蝕(General Corrosion) 6 2.2.2 局部腐蝕(Localized Corrosion) 7 2.3 鎂合金的化成皮膜處理 10 2.3.1 鉻酸鹽化成處理 10 2.3.2 磷酸鹽/錳酸鹽化成處理 11 2.3.3 稀土金屬元素化成處理 12 2.3.4 錫酸鹽化成處理 13 第3章 實驗方法 16 3.1 實驗流程 16 3.1.1 試片前處理 16 3.1.2 化成處理 18 3.2 化成皮膜性質觀察與量測 19 3.2.1 皮膜顏色觀察與厚度量測 19 3.2.2 皮膜附著性量測 19 3.2.3 開路電位量測 21 3.2.4 極化曲線量測 21 3.3 化成皮膜微結構與成分分析 22 3.3.1 掃描式電子顯微鏡 22 3.3.2 能量散佈光譜儀 22 3.3.3 低掠角X光繞射儀 23 第4章 實驗結果 25 4.1 化成處理製程監測 25 4.1.1 開路電位監測 25 4.1.2 化成液成分監測 25 4.2 化成皮膜性質觀察與量測 28 4.2.1 化成皮膜顏色觀察 28 4.2.2 化成皮膜厚度量測 30 4.2.3 化成皮膜附著性量測 33 4.3 化成皮膜微結構分析 34 4.3.1 皮膜表面形貌觀察 34 4.3.2 皮膜微結構之橫截面影像觀察 41 4.3.3 低掠角X光繞射分析 50 4.3.4 能量散佈光譜儀分析 50 4.4 化成皮膜抗蝕性質量測 53 4.4.1 開路電位量測 53 4.4.2 極化曲線量測 55 第5章 討論 57 5.1 化成液pH值於化成皮膜微結構之影響 57 5.2 化成液pH值於化成皮膜性質之影響 58 5.3 磷酸鹽/錳酸鹽化成皮膜之動力學參數討論 59 5.4 磷酸鹽/錳酸鹽化成處理製程參數之討論 67 第6章 結論 69 第7章 未來研究方向 70 第8章 參考文獻 71 | |
dc.language.iso | zh-TW | |
dc.title | 以pH值探討AZ31鎂合金磷酸鹽/錳酸鹽化成皮膜成長特性 | zh_TW |
dc.title | Effects of Solution pH on the Growth Characteristics of Phosphate/Permanganate Conversion Coatings on AZ31 Magnesium Alloys | en |
dc.type | Thesis | |
dc.date.schoolyear | 96-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 蔡文達,楊聰仁,林景崎,葛明德 | |
dc.subject.keyword | 鎂合金,磷酸鹽/錳酸鹽化成處理,pH值,結晶質析出物,非鉻化成處理, | zh_TW |
dc.subject.keyword | magnesium alloys,phosphate/permanganate conversion coating,pH value,crystalline precipitates,non-chromate conversion coating, | en |
dc.relation.page | 73 | |
dc.rights.note | 同意授權(全球公開) | |
dc.date.accepted | 2008-07-26 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 材料科學與工程學研究所 | zh_TW |
顯示於系所單位: | 材料科學與工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-97-1.pdf | 11.2 MB | Adobe PDF | 檢視/開啟 |
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。