m z+ +ze m 2h + +ze h 2 ph o 2 +4h + +4e 2h 2 o ph 一. 电沉积 ( 电镀 ) electrodeposition...
Post on 21-Dec-2015
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![Page 1: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/1.jpg)
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Mz++zeM crMirM ,,
2H++zeH2059.0
2
HH pH
O2+4H++4e2H2O059.0229.1
22
O
OH pH
一 . 电沉积 ( 电镀 )Electrodeposition (Electroplating)
![Page 4: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/4.jpg)
-MHHM
-i
![Page 5: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/5.jpg)
-i
-MHHM
![Page 6: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/6.jpg)
用非水溶液 熔融盐
控制 i
![Page 7: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/7.jpg)
a) M 一般很小,远小于 H
b) 沉积金属与原基底的电极
的 M 不同
![Page 8: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/8.jpg)
2. 多种金属离子共存
a. 若要 M1 先沉积,
必须 1 > 2
222111 lnln azF
RTa
zF
RT oo
M1 和 M2
![Page 9: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/9.jpg)
b. 要求 M1 和 M2 完全分离,先沉积 M1 ,待其浓度降低至 10-6a1 时,MM2 方才沉积
1, 定量 2, 开始沉积
222
2116
11 ln10ln a
Fz
RTa
Fz
RT oo
![Page 10: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/10.jpg)
1, 定量 2, 开始沉积
222
2116
11 ln10ln a
Fz
RTa
Fz
RT oo
若 12 0 , a1=a2, z1 = z2
621 10lg
0591.0 z
oo
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c. 若需 M1 与 M2 同时共沉积( 形成合金 )
(I) 1o 2
o, 1 2
a1 a2 1 2
(II) 1o - 1 2
o - 2
a1, a2 1 2,
或调节 1 与 2, ( 通过改变基底材料 )
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(III) 改变 o ( 络合离子形式 )
Mo/V (SO4=)o/V (CN-)Cu 0.34 -1.0Cd-0.40 -0.9Zn-0.76 -1.23. 与其它材料微粒共沉积改变 镀层性质
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二 . 电解 ( 电化学合成 )1. 强还原性物质的合成
( 碱(土)金属 , Al 等 )
2. 强氧化性物质的合成
(KMnO4, KClO4, H2O2)
3. 电解制气 (Cl2, H2….)
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4. 电解制碱 (NaOH…)
5. 特殊材料的电合成(聚氟化
物、新型含氟塑料…… . )
6. 无污染有机合成
(己二腈,四烷基铅)
![Page 16: M z+ +ze M 2H + +ze H 2 pH O 2 +4H + +4e 2H 2 O pH 一. 电沉积 ( 电镀 ) Electrodeposition (Electroplating)](https://reader033.vdocuments.mx/reader033/viewer/2022061515/56649d5a5503460f94a3a28b/html5/thumbnails/16.jpg)
理论产量实际产量
电解电流效率
实际消耗电能理论所需电能
电能效率
槽压理论分解电压
电压效率