Anode Behaviors in Sn-Ag Alloy Plating from Ammonium Citrate-potassium Iodide Baths.
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- FUJIWARA Yutaka
- Osaka Municipal Tech. Res. Inst.
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- NARAHARA Taeko
- Kizai Corp.
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- ENOMOTO Hidehiko
- Osaka Municipal Tech. Res. Inst.
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- FUNADA Kiyotaka
- Kizai Corp.
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- OMI Takashi
- College of Eng., Osaka Pref. Univ.
Bibliographic Information
- Other Title
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- クエン酸アンモニウム‐ヨウ化カリウム浴からのSn‐Ag合金めっきにおけるアノードの挙動
- クエンサン アンモニウム ヨウカ カリウムヨク カラ ノ Sn-Ag ゴウキン
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Abstract
Anodic current density-potential curves of Sn, Ag, Pt, and graphite were measured to obtain informations on the selection of anode materials in ammonium citrate-potassium iodide baths for Sn-Ag alloy plating. The Sn anode was dissolved at small overpotentials in ammonium citrate solutions containing iodide and showed a very smooth electrode surface. However, a displacement deposition of rough Ag was observed when solutions contained Ag+. The Ag anode also dissolved at small overpotentials. Nevertheless, AgI was precipitated at the anode and therefore the limiting current densities were smaller than 10mA/cm2. The main electrode reaction at the Pt and graphite anode was oxidation of iodide to form I3-. This reaction also occurred at the Sn and Ag anode at high overpotentials. Sn2+ species was chemically oxidized by I3- formed at the anode, accumulating Sn4+ species in baths. To prevent both Ag displacement deposition and anodic oxidation of iodide, the electrode potential of the anode in Sn-Ag alloy plating baths must be maintained between -0.2V and 0.4V vs. NHE.
Journal
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- Journal of The Surface Finishing Society of Japan
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Journal of The Surface Finishing Society of Japan 49 (12), 1316-1321, 1998
The Surface Finishing Society of Japan
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Details 詳細情報について
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- CRID
- 1390001204115734912
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- NII Article ID
- 10002111297
- 10008848887
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- NII Book ID
- AN1005202X
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- COI
- 1:CAS:528:DyaK1MXis1Witw%3D%3D
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- ISSN
- 18843409
- 09151869
- http://id.crossref.org/issn/09151869
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- NDL BIB ID
- 4624040
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed