臺灣博碩士論文加值系統

此次實驗是利用EMF 量測法，以EMF 值來計算Zn-Al-Fe 和
Zn-Al-Mg 三元合金系統的熱力學性質，在富鋅區中滿足稀薄溶液。
利用Taylor series 展開帶入Al 的活性係數，將實驗值回歸得到方程式
係數。
溫度範圍適用於773~893K，在此溫度範圍內，代入任一溫度即
可求出該溫度的係數，再將合金莫耳分率代入方程式，即可得到有效
鋁的活性係數。

The study is about the thermodynamic properties of Zn-Al-Fe and
Zn-Al-Mg Alloys. The alloys are dilute solutions. We use the equation to
fit the experimental values in znic-rich alloys system ,and then we get the
coefficients of the equation.
The equation works at 773~893K. In this temperature range, we can
get the coefficients of equation at the specific temperature and then we
can use the equation to calculating the activity coefficient of effective
aluminum in the alloys.

目錄

論文審定書 i
誌謝 ii
中文摘要 iii
英文摘要 iv
壹、前言 1
貳、文獻回顧 3
2-1 熱浸鍍鋅的鍍層生長 3
2-2-1 熱浸鍍鋅的鋅液中含鋁的影響 4
2-2-2 熱浸鍍鋅鋅液含有Si的影響 5
2-3-1 熱浸鍍鋅鋅液添加Mg的影響 6
2-3-2熱浸鍍鋅鋁和鋅鋁鎂的比較 7
2-4抑制層的形成和消失 7
2-1-4鋅渣的危害與控制 8
2-5電化學與熱力學的關係 9
2-6 Electromotive Force Method (EMF量測法) 10
2-7熱浸鍍鋅中Zn-Fe-Al與Zn-Mg-Al三元系統描述 12
2-8 Al-Zn的EMF量測 15
2-9 三元稀薄溶液的熱力學性質 16
參、實驗方法 19
3-1 實驗裝置 19
3-2 電極與合金的製備 19
3-2-1 EMF量測 20
3-3 合金成分定量檢測 21
肆、實驗結果與討論 22
4-1 Al-Zn二元合金的EMF量測 22
4-2 Zn-Al-Fe三元合金的EMF量測 22
4-2-1 Zn-Al-Fe 各合金的溫度與電動勢 23
4-2-2 803K 下溫度截面討論 23
4-2-3 833K 下溫度截面討論 24
4-2-4 863K 下溫度截面討論 25
4-2-5 893K 下溫度截面討論 26
4-3 Zn-Al-Fe 合金活性係數討論 27
4-4 Zn-Al-Mg三元合金的EMF量測 29
4-4-1 Zn-Al-Mg 各合金的溫度與電動勢 29
4-4-2 833K 下溫度截面討論 29
4-4-3 863K 下溫度截面討論 30
4-4-4 893K 下溫度截面討論 32
4-5 Zn-Al-Mg 合金活性係數討論 34
陸、參考文獻 35

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