Electrodeposition of Amorphous Ni-Mo Alloys from Ammonia Citrate Bath and Their Corrosion Resisitance.
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- YUAN Bao-lin
- Central Res. Lab., C. Uyemura & Co.
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- LIU Ke-li
- Central Res. Lab., C. Uyemura & Co. Present: Beijin Inst. of Chemistry
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- KOWAKA Masamichi
- Central Res. Lab., C. Uyemura & Co.
Bibliographic Information
- Other Title
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- アンモニア・クエン酸塩浴による電析Ni‐Mo非晶質合金の作製と耐食性
- アンモニア クエンサンエンヨク ニ ヨル デンセキ Ni Mo ヒショウシツ
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Abstract
The preparation of amorphous Ni-Mo alloy films by electrodeposition from ammonia citrate baths with the addition of ammonia as a complexing agent was studied, and their corrosion resistance was determined.<br>Amorphous Ni-Mo alloy films were deposited from baths of a pH of 9.0 containing nickel sulfate (0.13∼0.18mol/L) and sodium molybdate (0.08∼0.13mol/L) such that total metallic (Ni2++Mo6+) ion concentration was a constant 0.26mol/L with 0.32mol/L of sodium citrate and 0.53mol/L of ammonia as a complexing agent at a pH of 9.0 and current densities of 8∼20A/dm2.<br>Electrolytic aging produced an increase in the molybdenum content of the electrodeposited film to 37wt% as well as arise in cathodic current efficiency. Peeling of the films was reduced, and no cracking occurred. Films with a molybdenum content of about 28wt% or more exhibited an amorphous structure. Electrochemical measurements and immersion tests were curried out at 30°C in both 1N H2SO4 and 1N HCl solutions, and the results indicated that amorphous Ni-Mo alloys had greater self-passivation ability and lower corrosion rates than did crystalline alloys, and showed better corrosion resistance than SUS 304 stainless steel in the above mentioned solutions.
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 42 (6), 639-644, 1991
The Surface Finishing Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282679090508672
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- NII Article ID
- 130001073181
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- NII Book ID
- AN1005202X
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- COI
- 1:CAS:528:DyaK38Xht1ClsA%3D%3D
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- ISSN
- 18843409
- 09151869
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- NDL BIB ID
- 3721267
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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