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ID 30480
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High-Efficient and High-Speed Chromium Deposition in a Formic Acid Bath I. Static and Rotating Specimens
著者
菰田 進一郎
松村 昌信
キーワード
Chromium
High Current Efficiency
High Speed Deposition
Formic Acid Bath
Aging Time
NDC
金属工学・鉱山工学
抄録(英)
A defect associated with the use of a Sargent bath, a widely used chromium plating device, is the substantially lower current efficiency of chromium compared to that of other metals. It has been reported that the use of a formic acid bath leads to the production of amorphous-structured chromium deposits with a higher current efficiency. However, it is difficult to use this process commercially, because of difficulties involved in maintaining the bath. The purpose of this study was to examine in detail the conditions for chromium deposition in a formic acid bath with the objective of developing an optimum plating method with a higher current efficiency and a higher deposition rate. In order to realize a higher deposition rate, the effect of agitating the solution, via the use of a rotating disk electrode (RDE) apparatus, was examined. The findings show that the rate of deposition and current efficiency increased with increasing current density. By rotating the specimen, however, plating with bright surfaces was obtained more easily and under a wide variaty of plating conditions. The appearance of the surface of the deposited chromium was affected by the current density, the aging time of the solution used, and the rotating speed. We conclude that the morphology of the deposited chromium is closely related to the Cr3+ concentration in the proximity of the surface of the specimen.
掲載誌名
表面技術
55巻
1号
開始ページ
65
終了ページ
70
出版年月日
2004-01-01
出版者
表面技術協会
ISSN
0915-1869
NCID
出版者DOI
言語
日本語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
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権利情報
Copyright (c) 2005 (社)表面技術協会
本文データは学協会の許諾に基づきJ-STAGEから複製したものである
関連情報URL
部局名
工学研究科