合金元素對鋁犧牲陽極微結構與電化學特性之影響

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姓名

朱嘉誠(Jia-Cheng Jhu) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

合金元素對鋁犧牲陽極微結構與電化學特性之影響
(Effect of alloy element on the microstructure and electrochemical properties of Al anode)

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摘要(中)

本研究藉由極化試驗、浸泡腐蝕試驗、微結構觀察，來探討微量元素(錫、鎂與鎵)對鋁合金犧牲陽極時效處理之電化學性質影響。
結果顯示，在3.5wt%NaCl電解液中，微量錫可抑制合金鈍化層的生成，使合金與電解液能持續反應；微量鎂則可以增加合金耐腐蝕性質。且由極化試驗結果顯示，不論是在3.5wt%NaCl與26wt%KOH溶液中，合金時效處理後，能有效提高合金的活性，其中又以含微量錫的合金最為活潑。

摘要(英)

The principal aim of this research is to evaluate the effect of minor additions of tin, manganese, gallium and aging treatment on electrochemical properties of aluminum anode . The electrochemical characteristics of anode were investigated by means of tafel polarization, immersion corrosion test, scanning electron microscopy.
　　The results showed that addition tin can improve the electrochemical activity and inhibit the formation of passivation layer of Al-Zn alloy, moreover, magnesium can increase the corrosion resistance of alloy. The aging treatment can effectively improve the activity of the alloy which Al-Zn-Sn alloy as the most active alloy.

關鍵字(中)

★ 鋁犧牲陽極
★ 腐蝕
★ 合金設計
★ 電化學特性

關鍵字(英)

★ Al anode
★ corrosion
★ alloy design
★ electrochemical properties

論文目次

摘要.....................................I
Abstract................................II
總目錄...................................III
圖目錄...................................VII
1.研究背景與文獻回顧......................1
1.1研究背景..............................1
1.2鋁犧牲陽極簡介........................ 2
1.3鋁犧牲陽極應用上之困擾..................3
1.4鋁犧牲陽極活化機理......................3
1.5添加元素影響對鋁犧牲陽極之影響...........4
1.6鋁合金的腐蝕............................6
1.7犧牲陽極之腐蝕評估.......................9
1.8實驗設計與目的..........................11
2.實驗方法與步驟...........................13
2.1合金熔配與成份分析.......................13
2.2 熱處理與熱加工.........................15
2.3微觀結構觀察與分析.......................16
2.3.1光學顯微鏡(Optical Microscopy).........16
2.3.2掃描式電子顯微鏡(Scanning Electron Microscopy)....16
2.4導電度量測(Electrical Conductivity, %IACS).....16
2.5腐蝕試驗-電化學分析..............................17
2.6 浸泡腐蝕試驗....................................18
3.結果與討論........................................19
3.1微結構分析-光學顯微鏡..............................19
3.2導電度試驗........................................22
3.3電化學性質分析.....................................24
3.3.1極化試驗(於3.5wt%NaCl水溶液).....................24
3.3.2腐蝕性質(於26wt%KOH水溶液).......................32
3.4浸泡腐蝕試驗.......................................38
3.4.1自腐蝕性質 (於26wt%KOH水溶液)....................38
3.4.2自腐蝕性質 (於3.5wt%NaCl水溶液)...................41
4.結論................................................45
5.未來展望.............................................46
6.參考資料.............................................47

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指導教授

李勝隆(Sheng-Long Lee)

審核日期

2017-11-20

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