請用此 Handle URI 來引用此文件：
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/80802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 | Chien-Fu Lee | en |
| dc.contributor.author | 李建甫 | zh_TW |
| dc.date.accessioned | 2022-11-24T03:17:08Z | - |
| dc.date.available | 2024-10-31 | |
| dc.date.available | 2022-11-24T03:17:08Z | - |
| dc.date.copyright | 2021-11-08 | |
| dc.date.issued | 2021 | |
| dc.date.submitted | 2021-10-06 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/80802 | - |
| dc.description.abstract | 因環保節能等等的環境議題逐漸受到重視，鎂合金的高比強度、高導電導熱率、及生物可降解等等特性成為了一個未來發展的重點項目。然而鎂合金本身的高化學活性使其在應用方面增加了不少限制和條件，因此如何環保且有效的提升鎂合金的抗蝕性將是需要面對的問題。本研究嘗試使用六氟鋯酸鹽化成結合溶膠凝膠的複合製成來達到環保且抗蝕的效果。研究主要分為前後兩部分：前半將討論AZ31B經過不同pH值六氟鋯酸化成後的表面形貌及特性，後半則會討論後續進行溶膠凝膠處理後抗蝕性的變化及腐蝕行為。 研究結果發現，pH4為六氟鋯酸化成的一個重要分界，原因在ZrO2穩定存在的酸鹼值區間在pH4以上。pH4以下的化成條件使得較鈍態的雜質Al8Mn5以外的相對陽極區難以形成均勻的膜層結構而持續造成底材溶出，而雜質處因大量的還原反應有較多的ZrO2覆蓋。反之pH4以上即便在相對陽極處也可以有ZrO2沉積，而形成相對較穩定且連續的鈍化膜。其中pH值造成的ZrO2沉積成核點數量及沉積速率差異使得在不同pH值下所形成的鈍化膜結構其表面疏水性也會也有明顯不同，而表面疏水性造成的溶膠凝膠膜厚差異會大幅影響溶膠凝膠阻水阻氣的效果。 最後的腐蝕行為分析可以看到複合製成雖然可以有效提升鎂合金的抗蝕性，但Al8Mn5雜質處因不論在任何pH值下皆會因為有較厚的ZrO2沉積及劇烈的析氫反應使其周圍的膜層有較多的缺陷，因此腐蝕攻擊皆會出現在雜質附近。若要提升此複合製成的抗蝕效果，如何減少雜質造成的活性差異將會是需要解決的問題。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2022-11-24T03:17:08Z (GMT). No. of bitstreams: 1 U0001-0610202104020000.pdf: 7543741 bytes, checksum: 9f5069249125c1e92b8ec9a22d480d3a (MD5) Previous issue date: 2021 | en |
| dc.description.tableofcontents | 中文摘要 i Abstract ii 總目錄 iv 圖目錄 vii 表目錄 xi 第一章 前言 1 第二章 文獻回顧 3 2.1. 鎂合金簡介 3 2.2. 鎂合金系統 4 2.2.1. 添加鋁的影響 4 2.2.2. 添加鋰的影響 6 2.2.3. 添加鋅的影響 7 2.2.4. 添加錳的影響 9 2.3. 鎂合金腐蝕 10 2.3.1. 腐蝕分類 10 2.3.2. 鎂合金腐蝕產物 12 2.3.3. 負差值效應 15 2.3.4. 腐蝕環境離子影響 19 2.4. 鎂合金化成處理 22 2.4.1. 鉻酸鹽化成處理 23 2.4.2. 鋯鈦酸鹽化成處理 24 2.4.3. 溶膠凝膠化成處理 26 第三章 實驗步驟與方法 34 3.1. 試片前處理 34 3.2. 化成溶液配置 34 3.3. 即時攝影 36 3.4. 光學影像 36 3.5. 微結構分析 36 3.5.1. 表面形貌觀察 36 3.5.2. 橫截面影像觀察 37 3.5.3. 化學組成分析 37 3.6. 抗蝕性分析 38 3.6.1. 開路電位量測 38 3.6.2. 電化學交流阻抗分析 38 3.6.3. 動電位極化曲線分析 39 3.6.4. 接觸角測試 39 3.6.5. 析氫試驗 40 3.6.6. 鹽霧試驗 40 3.6.7. 硫酸銅試驗 40 第四章 實驗結果與討論 41 4.1. 溶膠凝膠化成膜分析 41 4.1.1. 表面形貌影像觀察 41 4.2. 不同pH值六氟鋯酸化成膜分析 43 4.2.1. 表面形貌影像觀察 43 4.2.2. 開路電位分析 47 4.2.3. 電化學交流阻抗 48 4.2.4. 動電位極化曲線 51 4.2.5. 析氫試驗分析 52 4.2.6. 接觸角測試 53 4.3. 不同pH值六氟鋯酸化成與溶膠凝膠複合製成分析 54 4.3.1. 表面形貌影像觀察 54 4.3.2. 橫截面之影像觀察 55 4.3.3. 電化學交流阻抗 57 4.3.4. 動電位極化曲線 60 4.3.5. 析氫試驗分析 61 4.4. 六氟鋯酸化成與溶膠凝膠複合製成腐蝕行為分析 63 4.4.1. 表面形貌影像觀察 63 4.4.2. 橫截面影像觀察 65 4.4.3. 硫酸銅測試 68 4.4.4. 析氫試驗分析 71 4.4.5. 鹽霧試驗 74 第五章 結論 75 第六章 未來展望 76 參考文獻 77 | |
| dc.language.iso | zh-TW | |
| dc.subject | 溶膠凝膠鍍層 | zh_TW |
| dc.subject | 抗蝕性 | zh_TW |
| dc.subject | 鋯化合物化成處理 | zh_TW |
| dc.subject | 電化學 | zh_TW |
| dc.subject | 鎂合金 | zh_TW |
| dc.subject | electrochemistry | en |
| dc.subject | magnesium alloy | en |
| dc.subject | zirconium conversion coating | en |
| dc.subject | sol-gel coating | en |
| dc.subject | corrosion resistance | en |
| dc.title | AZ31B鎂合金鋯酸與矽氧烷複合處理之腐蝕行為研究 | zh_TW |
| dc.title | The Corrosion Behavior of Hexafluorozirconic Acid and Silane Composite Coating on AZ31B Magnesium Alloy | en |
| dc.date.schoolyear | 109-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 蔡文達(Hsin-Tsai Liu),林景崎(Chih-Yang Tseng),葛明德,汪俊延 | |
| dc.subject.keyword | 鎂合金,鋯化合物化成處理,溶膠凝膠鍍層,抗蝕性,電化學, | zh_TW |
| dc.subject.keyword | magnesium alloy,zirconium conversion coating,sol-gel coating,corrosion resistance,electrochemistry, | en |
| dc.relation.page | 89 | |
| dc.identifier.doi | 10.6342/NTU202103571 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2021-10-08 | |
| 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 | 2024-10-31 | - |
| 顯示於系所單位： | 材料科學與工程學系 | |
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