著者

大塚 寿次

出版者

The Surface Finishing Society of Japan

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.35, no.1, pp.25-31, 1984

被引用文献数

2

著者

金子 克美

出版者

一般社団法人 表面技術協会

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.37, no.2, pp.46-54, 1986-02-01 (Released:2009-10-30)

参考文献数

81

被引用文献数

5

著者

津留 壽昭 木村 哲二 小林 繁夫 乾 忠孝

出版者

The Surface Finishing Society of Japan

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.27, no.5, pp.230-234, 1976

被引用文献数

3

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By using N, N-dimethylformamide(DMF), an aprotic polar solvent, the electrodeposition of lead from PbCl₂-DMF and Pb(NO₃)₂-DMF solutions was studied. The deposits of lead gave rise to the welldefined dendrites, when the electrolysis was carried out in higher concentration bath and at higher current densities, while at lower current densities (-3mA/cm²), the deposits became dark-gray and smooth. The dendrites of lead were of 2D [110], 3D [110] and 2D [100] types. The deposits from PbCl₂-DMF solutions were the isolated nuclei of the layer growth (hexagonal, tetragonal and trigonal deposits), when temperature was higher than 40°C. The deposits from Pb(NO₃)₂-DMF solutions were white powder when temperature was higher than 50°C, while at 100°C the dendrites were not observed. The X-ray analysis of the deposits of crystalline lead had well-defined diffraction patterns. By the addition of thiourea and 2-butyne-1, 4 diol to Pb(NO₃)₂-H₃BO₃-DMF baths, semi-bright and smooth lead deposits were obtained. They had fine grains in crystal structure and were found to have the strong preferred orientation of (220). The grain size of the deposit was 150-350Å. From these results the optimum condition for the electrolysis was as follows: Pb(NO₃)₂: 100g/<i>l</i>, H₃BO₃: 10g/<i>l</i>, (NH₂)₂CS: 4g/<i>l</i>, HOCH₂C≡CCH₂OH: 3g/<i>l</i>, temperature:room temperature, current density:0.5-1.0mA/cm², plating time: 60min, current efficiency: ca 50%.

著者

久松 敬弘

出版者

一般社団法人 表面技術協会

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.34, no.7, pp.354-360, 1983-07-01 (Released:2009-10-30)

参考文献数

16

被引用文献数

3 3

著者

乾 忠孝

出版者

一般社団法人 表面技術協会

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.8, no.7, pp.224-228, 1957-11-30 (Released:2009-10-30)

参考文献数

1

被引用文献数

1

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The mechanism of tungsten plating was investigated and the following results were obtained.1) The decomposition potential of tungsten in Na2WO4 solution is more negative than that of hydrogen, and its accurate decomposition potential could not be obtained from its current density potential curves. Of course, its decomposition potential differs according to the kind of cathodic metals.2) In the constant current density electrolysis, the cathodic potential is elevated with the progress of the electrolysis.3) In the constant potential electrolysis (e.g. 0.124V for Pt-W poles), a beautiful deposition of whitish grey metalic luster is obtained, with a little higher potential (e.g. 0.184V for Pt-W poles) a reddish brown metalic luster, and with a much higher potential black and spongy. With the lower potential, nothing is obtained but the generation of hydrogen.4) By the electron diffraction analysis, it is found that the whitish grey metalic deposition is chiefly composed of W-oxide (not WO2 or WO3) with a little metalic tungsten.5) When the Na2WO4 solution is electrolised, the tungsten becomes special cation of its oxide. When the solution is electrolysed with constant cathodic potential, the tungsten is regularly obtained as metalic deposition on the cathode. This deposition is chiefly composed of lower oxide tungsten (such as WO) containing a little tungsten. So, the resistance increases and the potential is elevated with the progress of electrolysis.As the potential is gradually elevated, the deposition grows rich in higher oxide and finally becomes to be spongy.After all, it might be concluded that, in order to obtain thick deposition from Na2WO4 solution, the amount of metallic ions in the solution is to be restricted and hydrogen ions increased, or some other reducing regents more powerful than hydrogen are to be used, or the alloy-plating is to be applyed.

著者

江口 晴一郎

出版者

一般社団法人 表面技術協会

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.15, no.7, pp.249-255, 1964-07-20 (Released:2009-10-30)

参考文献数

13

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Many industrial merits are found in electro-chemical machining of metals as compared with other conventional methods of metal working though the accuracy of the worked piece by electro- chemical machining is not very satisfactory.The author investigated anodic dissolution, working condition, and workability of removing iron in electro-chemical machining and the following experimental results were obtained:(1) Electro-chemical machining of iron could be successfully performed when halogen compounds were used for electrolyte.(2) The accuracy of worked piece was variant depending on distance between electrodes, nature of electrolyte and chemical composition and microstructure of working material.Electro-chemical machining of irons of almost same composition in sodium chloride solution gave variable results of anodic polarization potential depending upon the microstructure of working material.When anodic polarization potential was lower, both current efficiency and penetration rate were higher and also the removing was more effective.

著者

竹内 栄一

出版者

一般社団法人 表面技術協会

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.21, no.8, pp.443-449, 1970-08-01 (Released:2009-10-30)

著者

井川 進

出版者

一般社団法人 表面技術協会

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.22, no.3, pp.117-121, 1971-03-01 (Released:2009-10-30)

参考文献数

5

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The following experimental results were obtained by chemical analysis, DTA, TGA, X-ray diffractiometry, using infrared spectrometer, etc.(1) The hydrated chromium oxide film electrolytically formed on cathode from aqueous solution of single chromic acid was composed of chromium hydroxide with chromic anhydride adsorbed thereon.(2) The water content on chromium hydroxide in hydrated chromium oxide film was 33.5% and content of chromium anhydride adsorbed on the film was 16.5%(3) The approximate structural formula of the hydrated chromium oxide film was as follows:(CrO3)(Cr2O3)2⋅10H2O

著者

宮下 秀夫

出版者

一般社団法人 表面技術協会

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.15, no.1, pp.2-7, 1964-01-20 (Released:2009-10-30)

参考文献数

5