Effects of Chromium (III) Ions in the Plating Bath on Internal Tensile Stress in Nickel Deposits.
-
- TSURU Yutaka
- Fac. of Eng., Kyushu Inst. of Technology
-
- OHNO Satoko
- Fac. of Eng., Kyushu Inst. of Technology
Bibliographic Information
- Other Title
-
- ニッケルめっき膜の引張応力に及ぼすクロム(III)イオンの影響
- ニッケルメッキ マク ノ ヒッパリ オウリョク ニ オヨボス クロム 3 イオン ノ エイキョウ
Search this article
Abstract
A study of the effects of chromium (III) ion added as CrK(SO4)2 on average internal tensile stress in nickel deposits electroplated from a Watts bath of pH3.0 enabled us to detect variations in elastic deformation in deposits in situ using a resistance wire strain gauge on the reverse side of a copper electrode.<br>Chromium (III) ions close to the electrode surface changed to chromium hydroxide due to increased solution pH during nickel electroplating with hydrogen evolution. This is included in deposits as chromium oxide and chromium hydroxide.<br>With increasing CrK(SO4)2 concentration, total chromium oxide and chromium hydroxide in deposits increased and average internal tensile stress in deposits also rose. Internal tensile stress rose markedly at 1.5mM CrK(SO4)2, causing numerous cracks on the surface of nickel deposits at a concentration of 2.0 to 10.0mM CrK(SO4)2. The dependence of chromium oxide and chromium hydroxide content on CrK(SO4)2 concentration showed that these two compounds greatly enhance internal tensile stress in nickel deposits.
Journal
-
- Journal of The Surface Finishing Society of Japan
-
Journal of The Surface Finishing Society of Japan 50 (2), 202-207, 1999
The Surface Finishing Society of Japan
- Tweet
Details 詳細情報について
-
- CRID
- 1390282679091784576
-
- NII Article ID
- 10002111896
-
- NII Book ID
- AN1005202X
-
- COI
- 1:CAS:528:DyaK1MXhtlKqsL4%3D
-
- ISSN
- 18843409
- 09151869
- http://id.crossref.org/issn/09151869
-
- NDL BIB ID
- 4658142
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed