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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/80871完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林招松(Chao-Sung Lin) | |
| dc.contributor.author | Ching-Fu Hsu | en |
| dc.contributor.author | 徐慶富 | zh_TW |
| dc.date.accessioned | 2022-11-24T03:19:53Z | - |
| dc.date.available | 2026-09-01 | |
| dc.date.available | 2022-11-24T03:19:53Z | - |
| dc.date.copyright | 2021-11-06 | |
| dc.date.issued | 2021 | |
| dc.date.submitted | 2021-09-30 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/80871 | - |
| dc.description.abstract | 鋁合金具有良好的導電、導熱性質，同時在機械性質上，具有低密度、高強度重量比，故鋁合金廣泛應用在不同的產業上，如汽車產業或是航太產業都有鋁合金的身影在。鋁合金因具有緻密的氧化鋁，普遍來說耐腐蝕性較高，然而鋁合金會添加其他合金元素以達到所需特性，這會使鋁合金抗蝕性下降，故鋁合金仍然需要進一步的提升抗腐蝕性質。由於六價鉻對人體致癌且對環境有害，故本研究選擇自配鋯化成系統來取代六價鉻。 本論文探討 6061-T6 鋁合金之鋁鐵矽相與鎂矽相，在經過前處理與不同化成參數下之組成和形貌的變化，同時研究這些參數的抗腐蝕性質，以及探討經過168小時鹽霧測試後，鋁合金與異質相的腐蝕形貌與特徵。結果顯示6061-T6 鋁合金具有2種微米等級的異質相，OM 下白色的鋁鐵矽金屬間化合物以及黑色的鎂矽相，其中鎂矽相的表層可能因拋光或是在大氣中氧化而部分轉為氧化矽。前處理後，鋁鐵矽相並未改變，而鎂矽相會轉變為氧化矽，同時周圍會發生氧化矽與鋁基地周圍有不連續的現象，根據Auger 的結果，拋光後和前處理後的鋁基地上會覆蓋極薄的氧化鋁層，符合電化學以及鹽霧的結果，前處理後無法有效地提升抗蝕性。接續探討無前處理鋯化成與經過前處理鋯化成的試片，無前處理鋯化成鋁合金的鎂矽相不會全部轉變為氧化矽，而不論是否經過前處理，鋁鐵矽相都會沉積較厚的鋯化成皮膜。由電化學以及鹽霧的結果，經過前處理鋯化成與無前處理鋯化成相比有較好的抗蝕性。 後續探討具攻擊性的自由氟離子是否可以在相同條件下的化成反應中，能更有效地去除氧化鋁層以提高氧化鋯的沉積量。由EDS line scan 的結果顯示，添加愈多自由氟離子可使得鋁鐵矽相上的皮膜越厚。而開路電位的結果指出，添加愈多的自由氟離子，電位整體會下降，代表溶解鋁底材的反應會更加劇烈。同樣由SEM結果指出，添加自由氟離子會降低異質相的表面粗糙度，表示自由氟離子可均勻地與試片表面發生反應，伴隨之後的還原反應，可使表面有較全面的pH 上升，以促進鋯沉積反應。但當添加自由氟離子至300 ppm 時，表面會沉澱推測為Na3AlF6與KF相結合的化合物。由電化學的結果，添加自由氟離子100 ppm 於鋯化成沒有提升或下降鋁合金的抗蝕性。但添加太多如自由氟離子300 ppm 反而會降低抗蝕性。 最後探討 168 小時鹽霧測試的結果，可觀察出不同化成參數下，添加自由氟離子100 ppm 具有最好的抗蝕性結果，而添加自由氟離子300 ppm 則具有最差的結果，由SEM 結果，氧化矽周圍較容易發生腐蝕，而抗腐蝕性不佳的無前處理鋯化成在鋁鐵矽相甚至會發生伽凡尼腐蝕。 | zh_TW |
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| dc.description.tableofcontents | 口試委員審定書............................................................................................................... i 誌謝.................................................................................................................................. ii 中文摘要......................................................................................................................... iii Abstract..............................................................................................................................v 總目錄............................................................................................................................ vii 圖目錄............................................................................................................................. xi 表目錄.............................................................................................................................xx 第一章 前言...................................................................................................................1 第二章 文獻回顧...........................................................................................................3 2.1 鋁合金簡介 ....................................................................................................3 2.1.1 性質 ................................................................................................................3 2.1.2 種類及命名 ....................................................................................................4 2.2 鋁合金表面膜 ................................................................................................7 2.2.1 空氣中 ............................................................................................................7 2.2.2 水中 ................................................................................................................7 2.2.3 酸鹼中 ............................................................................................................7 2.2.4 氯離子在中性環境中 ....................................................................................8 2.3 鋁合金腐蝕種類 ............................................................................................9 2.3.1 概述 ................................................................................................................9 2.3.2 腐蝕分類 ......................................................................................................11 2.4 鋁合金之製造過程 ......................................................................................13 2.4.1 概述 ..............................................................................................................13 2.4.2 加工程序 ......................................................................................................13 2.4.3 析出強化 ......................................................................................................14 2.5 6061-T6 鋁合金之特性與異質相 ..............................................................15 2.5.1 概述 ..............................................................................................................15 2.5.2 異質相 ..........................................................................................................16 2.6 前處理 ..........................................................................................................18 2.6.1 概述 ..............................................................................................................18 2.6.2 鹼洗 ..............................................................................................................19 2.6.3 酸洗 ..............................................................................................................22 2.7 化成處理 ......................................................................................................23 2.7.1 概述 ..............................................................................................................23 2.7.2 六價鉻 ..........................................................................................................25 2.7.3 鋯化成 ..........................................................................................................27 第三章 實驗步驟與方法.............................................................................................32 3.1 實驗目的與流程 ..........................................................................................32 3.2 實驗材料與藥品 ..........................................................................................33 3.2.1 6061-T6 鋁合金 ...........................................................................................33 3.2.2 前處理藥品 ..................................................................................................34 3.2.3 鋯化成處理藥品 ..........................................................................................34 3.2.4 腐蝕測試實驗藥品 ......................................................................................34 3.3 試片處理 ......................................................................................................34 3.3.1 試片裁切與拋光 ..........................................................................................34 3.3.2 試片前處理 ..................................................................................................35 3.3.3 試片化成處理 ..............................................................................................36 3.4 微結構分析 ..................................................................................................37 3.4.1 光學顯微鏡 ..................................................................................................37 3.4.2 掃描式電子顯微鏡 ......................................................................................37 3.4.3 聚焦離子束與電子束顯微系統 ..................................................................38 3.4.4 穿透式電子顯微鏡 ......................................................................................38 3.5 化學組成分析 ..............................................................................................39 3.5.1 能量色散 X 射線光譜（EDS）..................................................................39 3.5.2 歐傑電子能譜 ..............................................................................................39 3.6 電化學分析 ..................................................................................................40 3.6.1 電化學儀器及腐蝕溶液 ..............................................................................40 3.6.2 開路電位 ......................................................................................................40 3.6.3 電化學交流阻抗 ..........................................................................................41 3.6.4 動電位極化曲線 ..........................................................................................41 3.7 鹽霧試驗 ......................................................................................................43 第四章 實驗結果.........................................................................................................44 4.1 6061-T6 鋁合金之拋光後分析 ..................................................................44 4.1.1 表面形貌影像觀察 ......................................................................................44 4.1.2 橫截面影像觀察 ..........................................................................................49 4.2 前處理後對試片的影響 ..............................................................................52 4.2.1 開路電位 ......................................................................................................52 4.2.2 表面形貌影像觀察 ......................................................................................54 4.2.3 橫截面影像觀察 ..........................................................................................60 4.2.4 電化學交流阻抗 ..........................................................................................63 4.2.5 動電位極化曲線 ..........................................................................................65 4.3 無前處理鋯化成對試片的影響 ..................................................................67 4.3.1 表面形貌影像觀察 ......................................................................................67 4.4 鋯化成對試片的影響 ..................................................................................72 4.4.1 開路電位 ......................................................................................................72 4.4.2 表面形貌影像觀察 ......................................................................................74 4.4.3 橫截面影像觀察 ..........................................................................................80 4.4.4 TEM 橫截面影像觀察.................................................................................83 4.5 添加自由氟離子鋯化成對試片的影響 ......................................................98 4.5.1 開路電位 ......................................................................................................98 4.5.2 表面形貌影像觀察 ......................................................................................99 4.5.3 橫截面影像觀察 ........................................................................................109 4.5.4 電化學交流阻抗 ........................................................................................116 4.5.5 動電位極化曲線 ........................................................................................119 4.6 鹽霧後分析 ................................................................................................121 4.6.1 168 小時鹽霧試驗後結果 .........................................................................121 4.6.2 拋光後 ........................................................................................................122 4.6.3 前處理後 ....................................................................................................124 4.6.4 無前處理鋯化成後 ....................................................................................126 4.6.5 鋯化成後 ....................................................................................................133 4.6.6 添加自由氟離子鋯化成 ............................................................................137 第五章 討論...............................................................................................................147 5.1.1 前處理與成膜機制討論 ............................................................................147 5.1.2 添加自由氟離子鋯化成討論 ....................................................................149 5.1.3 腐蝕機制討論 ............................................................................................153 第六章 結論...............................................................................................................155 第七章 未來展望.......................................................................................................156 參考文獻.......................................................................................................................157 | |
| dc.language.iso | zh-TW | |
| dc.subject | 鹽霧試驗 | zh_TW |
| dc.subject | 6061 鋁合金 | zh_TW |
| dc.subject | 前處理 | zh_TW |
| dc.subject | 鋯化成處理 | zh_TW |
| dc.subject | 自由氟離子 | zh_TW |
| dc.subject | 微結構 | zh_TW |
| dc.subject | 6061 Aluminum Alloy | en |
| dc.subject | salt spray test | en |
| dc.subject | free fluoride ions | en |
| dc.subject | zirconium conversion coating | en |
| dc.subject | pretreatment | en |
| dc.subject | microstructure | en |
| dc.title | 6061-T6鋁合金AlFeSi和Mg2Si相對鋯化成皮膜的影響 | zh_TW |
| dc.title | Effect of AlFeSi and Mg2Si Phases of 6061-T6 Aluminum Alloys on Zirconium Conversion Coatings | en |
| dc.date.schoolyear | 109-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 林景崎(Hsin-Tsai Liu),蔡文達(Chih-Yang Tseng),汪俊延,葛明德 | |
| dc.subject.keyword | 6061 鋁合金,前處理,鋯化成處理,自由氟離子,微結構,鹽霧試驗, | zh_TW |
| dc.subject.keyword | 6061 Aluminum Alloy,pretreatment,zirconium conversion coating,free fluoride ions,microstructure,salt spray test, | en |
| dc.relation.page | 161 | |
| dc.identifier.doi | 10.6342/NTU202103370 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2021-10-01 | |
| 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 |
| dc.date.embargo-lift | 2026-09-01 | - |
| 顯示於系所單位： | 材料科學與工程學系 | |
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