巻号一覧
25 巻, 10 号
選択された号の論文の6件中1～6を表示しています
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加工純鉄上への金の電析釜崎 清治, 田辺 良美1974 年 25 巻 10 号 p. 528-532
発行日: 1974/10/01
公開日: 2009/10/30
ジャーナル フリーThis paper describes the electronmicroscopic examination of nucleation, growth, and microstructure of Au films electrodeposited on cold-rolled pure Fe. The (001) Fe single crystals were rolled by reductions of 25, 50, and 75%. The number of nuclei formed on these substrates increased with the increase of reduction ratio. The number of nuclei on rolled Fe of 75% reduction was about 3×1011cm-2 at maximum, which seemed to show the preferential occurrence of nucleation in the strained fields around the dislocations on the substrate surface. However, the growth morphology of these particles was identical with that of particles deposited on annealed pure Fe. Many micro-twins had been introduced in Au films to relax the strains of Au films inherited from the strains of substrate. The number of formation of these twins was maximum when the film grew up into net-work structure. The (001) Au plane in the Au plate crystals tended to be oriented in parallel to the (001) Fe plane. However, in a diffraction pattern, the Debye-Scherrer ring co-existed with the N-pattern.抄録全体を表示PDF形式でダウンロード (3150K) -
武井 たつ子1974 年 25 巻 10 号 p. 533-536
発行日: 1974/10/01
公開日: 2009/10/30
ジャーナル フリーThe electrodeposition of nickel from Ni(CF3COO)2-halide-MeOH solutions was studied by the present author. This paper describes the electrodeposition of nickel from Ni(CF3COO)2-NH4Br-MeOH bath and its mechanism. Smooth nickel deposits were obtained under a current density of 6.0-22.0 Amp/dm2 from Ni(CF3COO)2 (500g/l)-NH4Br (50g/l)-MeOH bath at 50°C. The current efficiencies in this case were about 100% for both of cathode and anode. The charge transfer reaction was a rate controlling step in electrodeposition of nickel from Ni(CF3COO)2-NH4Br (50g/l)-MeOH bath under current density of 0.85-3.7Amp/dm2. The main values in these experiments were as follows: Apparent transfer coefficient: αc=0.78, Apparent valence: n=0.96, Apparent exchange current density: ioc=0.23Amp/dm2, Tafel slope: bc=-0.086V, and Apparent activation energy: Ec=5.5kcal/mol.抄録全体を表示PDF形式でダウンロード (570K) -
福島 敏郎, 福田 芳雄, 伊藤 伍郎, 三好 賢1974 年 25 巻 10 号 p. 537-541
発行日: 1974/10/01
公開日: 2009/10/30
ジャーナル フリー99.99% aluminum sheets were anodized at current densities of 1.87-37.4A/dm2 in hydroxycarboxylic acid solutions, pKa values of which were less than 4. The bath concentrations were between 0.01M/l and saturated solution and the bath temperatures between 20°C and boiling point. Porous and uniform coatings were obtained in tartaric and malic acid baths at relatively high temperatures and with concentrated solutions. In this case, E-t curves were of stationary type and the bath voltage depended on the temperature and the concentration. The coatings were thick, integrally colored and also hard enough to be highly resistant to abrasion, as will be reported in another paper. On the other hand, at low temperatures and concentrations, the anode was locally attacked. By the infrared absorption spectrum of the porous coatings, it was elucidated that=CO radical is contained in the coatings. It was recognized therefore that the reaction products of these acids are incorporated in the porous coatings. In the bath of lactic, salicylic or γ-resorcylic acid, the uniform coating was not obtained. Although the values of pKa of these acids are relatively low, the bath concentrations are not high enough to form the porous coating, because of the low solubility of the acids.抄録全体を表示PDF形式でダウンロード (1716K) -
福島 敏郎, 福田 芳雄, 伊藤 伍郎, 清水 明1974 年 25 巻 10 号 p. 542-546
発行日: 1974/10/01
公開日: 2009/10/30
ジャーナル フリー99.99% aluminum sheets were anodized with various inorganic acids, pKa values of which were mostly less than 2, by applying d.c. of 1.87-37.4A/dm2. The bath concentration was between 0.01M/l and the saturated aqueous solution and the bath temperature between 20°C and boiling point. Porous and uniform coatings were formed in sulfuric, phoshorous, phosphoric, hypophosphorous, EHDP, arsenic and chromic acid baths at certain electrolytic conditions, but integral color of the coating was not observed. The porous structure involving round cracks was observed at pittings which occurred in the bath of above acids. At high temperatures, the solvent action of the acids was strong, so that extremely thin coatings were obtained. With nitric or perchloric acid, caved pittings occurred and the porous structure was not observed around pittings. With periodic, iodic or boric acid, some insoluble matter was deposited on pittings. With telluric, phosphomolybdic or molybdic acid, the uniform and porous coating was not formed. Hunter's electrical method for measuring the thickness of barrier layer was found useful to evaluate the microstructure of the anodized surface precisely.抄録全体を表示PDF形式でダウンロード (829K) -
上田 重朋, 稲垣 雅一1974 年 25 巻 10 号 p. 547-548
発行日: 1974/10/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (900K) -
本間 順一1974 年 25 巻 10 号 p. 549-552
発行日: 1974/10/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1106K)
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