Title page for 953203019


[Back to Results | New Search]

Student Number 953203019
Author Vincent Kao(高銘辰)
Author's Email Address Vincent.mc.kao@gmail.com
Statistics This thesis had been viewed 1931 times. Download 771 times.
Department Mechanical Engineering
Year 2007
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Micro-arc anodizing of magnesium-lithium alloys add rare-earth element
Date of Defense 2008-06-23
Page Count 111
Keyword
  • anodizing
  • magnesium-lithium alloys
  • Abstract This research tries to improve corrosion resistance of LAZ1110, LAZ1110 +Be, LAZ1110 +Sc, LAZ1110 +Be +Sc magnesium alloys by means of micro-arc anodizing. In the experiment, the electrolytic solution is composed of 40gl-1 Na2SiO3, 100gl-1 NaOH, 20gl-1 NaPO2and 80gl-1(COOH)2.2H2O in distilled water. After the micro-arc anodizing treatment, it will discuss to various parameters. 
    The results indicated that the anodic oxidation film has better corrosion performance under the pulse current condition. In four materials of LAZ1110, LAZ1110 +Be, LAZ1110 +Sc, LAZ1110 +Be +Sc magnesium alloys, LAZ1110 +Be have the worst of corrosion resistance, and LAZ1110 +Sc have the best of corrosion resistance, in the basic extrapolate, add the Be element have decrease the oxidation on the magnesium alloys surface, this phenomenon destroy the anodic oxidation film of LAZ1110 +Be during micro-arc anodizing treatment, add the Sc element have increase the effect of corrosion resistance. 
    Temperature, frequency, time, current density, duty cycle and electrolytic concentration have an influence on micro-structure and corrosion performance of anodic films. In our research, it fixed current density and another parameter, and it used various of time parameter to find out the best operate condition, the results indicated that at 8min of operate condition of micro-arc anodizing treatment have the best of anodic oxidation film.
    Table of Content 中文摘要.................................................I
    英文摘要................................................II
    誌謝....................................................IV
    目錄.....................................................V
    圖目錄..................................................XI
    表目錄................................................XIII
    第一章 前言..............................................1
    第二章、文獻回顧.........................................6
    2.1 鎂及鎂合金的腐蝕特性.................................7
    2.1.1鎂的活性............................................7
    2.1.2鎂在水溶液之反應....................................9
    2.2 環境對鎂合金腐蝕之影響.............................10
    2.3 金屬元素對鎂及其合金的影響..........................12
    2.4 鎂及其合金之表面耐蝕處理............................18
    2.4.1 電鍍與無電鍍......................................18
    2.4.2 化成處理..........................................19
    2.4.3 氣相沈積法........................................21
    2.4.4 鎂合金之微弧陽極處理..............................22
    2.4.4.1陽極膜形成機制...................................23
    2.4.4.2陽極膜之結構.....................................27
    2.4.4.3施加電壓電流對陽極化處理之影響...................28
    2.4.4.4電解液之選擇及對陽極膜之影響.....................29
    第三章 實驗步驟.........................................32
    3.1 實驗材料與試片準備..................................32
    3.2 陽極化處理程序......................................35
    3.3 表面型態以及結構成分分析............................37
    3.4 陽極膜耐蝕效果測試..................................38
    第四章、結果與討論......................................39
    4.1 氫氧化鉀、矽酸鉀陽極處理液配方對陽極膜之影響........39
    4.2 矽酸鈉、氫氧化鈉、次磷酸鈉、乙二酸陽極處理液配方對陽極膜之影響................................................49
    4.3 矽酸鈉、氫氧化鈉、次磷酸鈉、乙二酸陽極處理液配方之時間參數對陽極膜之影響......................................60
    4.3.1表面分析...........................................60
    4.3.2 斷面分析..........................................66
    4.4電化學極化曲線測試...................................76
    4.4.1不同陽極處理液配方.................................76
    4.4.2時間參數...........................................81
    第五章 結論.............................................84
    參考文獻................................................87
    Reference [1] 蔡幸甫,”鎂合金在電子產品上的應用與產業概況”,工業材料,
    152 期,1999 年8 月,pp.62-71
    [2] 蔡幸甫,”筆記型電腦應用鎂合金的幾個重大理由”,工業材料,
    154 期,1999 年10 月,pp.116-120。
    [3] 楊智超,”鎂合金材料特性及新製程發展”,工業材料,152 期,1999年8 月,pp.72-80
    [4] 楊金瑞、葉信宏,”鎂合金表面處理簡介”,工業材料,152 期,1999年8 月,pp.106-109
    [5] 楊聰仁,”鎂合金非鉻系表面處理技術”,工業材料,174 期,2001年6 月,pp.97-101
    [6] 廖銘枝,”鎂合金鉻酸與非鉻酸前處理之比較”,鑄造月刊,125 期,2000 年2 月,pp.13-14
    [7] 黃東茂,” 鎂合金產品表面處理技術探索”,機械工業,2001 年4月,pp.236
    [8] 馬寧元,” 鎂合金表面處理簡介”,鍛造,第九卷第一期,2000 年3 月,pp.37-49
    [9] M. Pourbaix, Atlas of Electrochemical Equilibria in Aqueous Solution, NACE,Houston, TX, USA, 1974.
    [10] J. H. Nordlien, S. Ono, N. Masuko, K. Nisancioglu, “A TEM investigation ofnaturally formed oxide films on pure magnesium, Corrosion science, 39, 8, (1997),1397.
    [11] M.M. Avedesian, H. Baker (Eds.), Magnesium and Magnesium Alloys, ASM Specialty Handbook, ASM International, Materials Park, OH, USA (1999) p. 194.
    [12] A. L. Rudd, C. B. Breslin, F. Mansfeld, “The corrosion protection afforded by rare earth conversion coatings applied to magnesium”, Corrosion science, 42, (2000),275.
    [13] K. Huber, “Anodic formation of coatings on magnesium. Zinc, and cadmium”,Journal of elrctrochemical society, 100, 8, (1953), 376.
    [14] The Dow chemical company, G.B. Pat. 762,195, (1956).
    [15] S, J, Xia, R. Yue, R. G. Rateick Jr., V. I. Birss, “Electrochemical studies of AC/DC anodized Mg alloy in NaCl solution, Journal of the electrochemical society, 151, 3, (2004), B179.
    [16] V. Birss, S. Xia, R. Yue, R. G. Rateick Jr., “Characterization of oxide films formed on Mg-base WE43 alloy using AC/DC anodization in silicate solutions"
    [17] J. E. Gray, B. Luan, “Protective coatings on magnesium and its alloys-a critical review”, Journal of alloys and compounds, 336, (2002), 88.
    [18] 金美敬,”台灣自行車產業鎂合金材料應用探討”,工業材料,159期,2000 年3 月,pp.91-96
    [19] 王文樑,”鎂合金於外國汽車產業”,金屬工業,34 卷3 期,2000年5 月,pp.58-65
    [20] Genevieve Baril, Nadine Pebere, “The corrosion of pure
    magnesium in aerated and deaerated sodium sulphate solution”,Corrosion Science, Vol.43, 2001, pp.471-484
    [21] R. Ambat, N. N. Aung, W. Zhou, “Evaluation of microstructural effects on corrosion behavior of AZ91D magnesium alloy”, Corrosion science, 42, (2000),1433.
    [22] R. Ambat, N. N. Aung, W. Zhou, “Study on influence of chloride ion and pH on the corrosion and electrochemical behavior of AZ91D magnesium alloy”, Journal of applied electrochemistry, 30, (2000), 865.
    [23] W. M. Chan, F. T. Cheng, L. K. Leung, R. J. Horylev, T. M. Yue, “Corrosion behavior of magnesium alloy AZ91 and its MMC in NaCl solution”, Corrosion reviews, 16, 43, 1998.
    [24] 陳欣蘋,”顯微結構對壓鑄AZ91D 鎂合金之腐蝕行為影響研究”,國立成功大學碩士論文,民國91 年。
    [25] O. Lunder, J. E. Lein, T. Kr. Aune, K. Nisancioglu, “The role of Ma17Al12 phase in the corrosion of Mg alloy AZ91”,Corrosion, 45, 9, (1989), 741.
    [26] G. Song, A. Atrens, X. Wu, B. Zhang, “Corrosion behavior of AZ21, AZ501 and AZ91 in sodium chloride”, Corrosion science, 40, 10, (1998), 1769.
    [27] R. Udhayan, D. P. Bhatt, “On the corrosion behavior of magnesium and its alloys using electrochemical techniques”, Journal of power sources, 63, (1996), 103.
    [28] G. Song, A. Atrens, M. Dargusch, “Influence of microstructure on the corrosion of die-cast AZ91D”, Corrosion science, 41, (1999), 249.
    [29] A. K. Dahle, Y. C. Lee, M. D. Nave, P. L. Schaffer, D. H. StJohn, “Development of the as-cast microstructure in magnesium-aluminium alloys”, Journal of light metals, 1, (2001), 61.
    [30] A. K. Sharma, R. U. Rani, S. M. Mayanna, “Therma; studies on electrodeposited black oxide coating on magnesium alloys”, Thermochimica acta, 376, (2001), 67.
    [31] A. Yamamoto, t. Ashida, Y. Kouta, K. B. Kim, S. Fukumoto, H. Tsubakino,“Precipitation in Mg-(4-13)%Li-(4-5)%Zn ternary alloys”, Materials transactions,44, 4, (2003), 619.
    [32] O. Lunder, T. Kr. Aune, K. nisancioglu, “Effect of Mn additions on the corrosion behavior of mould-cast magnesium ASTM AZ91”, Corrosion, 43, 5, (1987), 291.
    [33] Y. Tamura, J. Yagi, T. Haitani, T. Motegi, N. Kono, H. Tamehiro, H. Saito,“Observation of manganese-bearing particles in molten AZ91 magnesium alloy by rapid solidification”, Materials transactions, 44,4, (2003), 552.
    [34] B. L. Mordike, T. Ebert, “Magnesium properties- applications- potential”,Materials science and engineering A302, (2001), 37.
    [35] S. J. Splinter, N. S. McIntyre, P. A. W. van der Heide, T. Do, “Influence of low 209 level iron impurities on the initial interaction of water vapour with polycrystalline
    magnesium surfaces”, Surface science, 317, (1994), 194.
    [36] 林欣滿, 「添加鋁對鎂鋰合金特性影響之研究」, 逢甲大學, 碩士論文, 民國93年。
    [37] B. Smola, I. Stul´ıkov´a, V. Oˇcen´aˇsek, J. Pelcov´a and V. Neubert, “Annealing effects in Al–Sc alloys”, Materials Science and Engineering A 462 (2007), pp.370–374.
    [38] ASTM B275.
    [39] L. Kouisni, M. Azzi, M. Zertoubi, F. Dalard, S. Maximovitch, “Phosphate on magnesium alloy AM60 pare 2: electrochemical    behavior in borate buffer solution”, Surface and coatings technology, 192, (2005), 239.
    [40] K. T. Rie, J. Whole, “Plasma-CVD of TiCN and ZrCN films n light metals”,Surface and coatings technology, 112, (1999), 226.
    [41] C. Sella, J. Lecoeur, Y. Sampeur, P. Catania, Surface and coatings technology,(1993), 287.
    [42] O. Khaselev, J. Yahalom, “The anodic behavior of binary Mg-Al alloys in KOH-Aluminate solution”, Corrosion science, 40, 7, (1998), 1149.
    [43] S. J. Kim, R. Ichino, M. Okido, “Characterization of anodic films formed on Mg-Al alloys in alkaline bath”, Materials science forum, 426-432, (2003), 3427.
    [44] F. Keller, M. S. Hunter, D. L. Robinson, “Structure features of oxide coatings on aluminum”, Journal of electrochemical sociwty, 100, 9, (1953), 411.
    [45] S. Ono, K. Asami, T. Osaka, N. Masuko, “Structure of anodic films formed on magnesium”, Journal of electrochemical society, 143, 3, (1996), L62.
    [46] A. L. Yerokhin, X. Nie, A. Leyland, A. Matthews, S. J. Dowey, “Plasma electrolysis for surface engineering”, Surface and coatings technology, 122, (1999),
    [47] O. Khaselev, D. Weiss, J. Yahalom, “Anodizing of pure magnesium in KOH-Aluminate solutions under sparking”, Journal of electrochemical society,146, 5, (1999), 1757.
    [48] A. J. Zozulin, D. E. Bartak, “Anodized coatings for magnesium alloys”, Metal finishing, 3, (1994), 39.
    [49] S, J, Xia, R. Yue, R. G. Rateick Jr., V. I. Birss, “Electrochemical studies of AC/DC anodized Mg alloy in NaCl solution, Journal of the electrochemical society, 151, 3, (2004), B179.
    [50] V. Birss, S. Xia, R. Yue, R. G. Rateick Jr.“Characterization of oxide films formed on Mg-base WE43 alloy using AC/DC anodization in silicate solutions",
    Journal of electrochemical society, 151, 1, (2004), B1.
    [51] Y. Mizutani, S. J. Kim, R. Ichino, M. Okido, “Anodizing of Mg alloys in alkaline solutions”, Surface and coatings technology, 169-170, (2003), 143.
    Advisor
  • Shyong Lee(李雄)
  • Files
  • 953203019.pdf
  • approve in 1 year
    Date of Submission 2008-07-23

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have dissertation-related questions, please contact with the NCU library extension service section.
    Our service phone is (03)422-7151 Ext. 57407,E-mail is also welcomed.