巻号一覧
26 巻, 5 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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高速度メッキへの導入川崎 元雄1975 年 26 巻 5 号 p. 208-214
発行日: 1975/05/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (922K) -
柏原 太郎, 吉岡 一和, 加藤 敏春, 有馬 純治, 毛利 信幸1975 年 26 巻 5 号 p. 215-219
発行日: 1975/05/01
公開日: 2009/10/30
ジャーナル フリーThe behavior of Cr(OH)3-Ca(OH)2 system and CaCrO4 in H2 atmosphere was studied. In Cr(OH)3-Ca(OH)2 system, α was produced at 580°C, at which the crystallization of Cr(OH)3 occurs; however, in Cr2O3-Ca(OH)2 system, it was produced after calcined above 800°C. It was not evident whether α, having an empirical formula of Ca3Cr10O18, is a simple substance or not. Alpha (α) was produced by the calcination of CaCrO4 at 510°C in the reducing atmosphere, and it was decomposed into CaCrO4 and Cr2O3 when calcined at 470°C in the air.抄録全体を表示PDF形式でダウンロード (668K) -
吉原 秀雄1975 年 26 巻 5 号 p. 219-223
発行日: 1975/05/01
公開日: 2009/10/30
ジャーナル フリーIt has not been clearly interpreted yet that the hardness and the abrasion resistance of anodic oxide films are increased by the secondary hardening treatment. In this paper, therefore, the structure changes of anodic oxide films caused by the secondary hardening treatment were investigated by X-ray diffraction method. The effect of pH values of treating solutions on the hardness of anodic oxide films was also investigated. As a result of the hardening treatment crystalline alumina was detected in the films, although the crystal does not seem to contribute to the increase of the hardness. Other oxides, ZnO and NiO, were observed in the anodic oxide films sealed with solutions which contain zinc acetate and nickel acetate. Increase of the abrasion resistance of the anodic oxide films thus sealed might be explained in terms of lubricating properties of the oxides. The hardness of anodic oxide films, on the other hand, was found to be remarkably increased as well by the chemical treatment using allkalline solutions and by the successive heat-treatment.抄録全体を表示PDF形式でダウンロード (664K) -
馬場 宣良, 中村 盛雄, 吉野 隆子1975 年 26 巻 5 号 p. 224-228
発行日: 1975/05/01
公開日: 2009/10/30
ジャーナル フリーA modified explanation of the mechanism of metal deposition on the porous anodic oxide film of aluminum separated from the substrate is proposed as a result of measuring anion effect of the catholyte, membrane potential and ionic permeability. A concentration cell, Cu/CuSO4 (0.1mol)/oxide film/CuSO4 (x mol)/Cu was constructed and its EMF was measured by a potentiometer. Oxalic acid film manifested very low asymmetrical potential which well responded against the ionic concentration, whereas sulfuric acid film showed very high asymmetrical potential with less reproducibility. By utilizing tracer technique, diffusion and migration velocity of sulfate ion was determined. From these results, Cu2+ ion is supposed to be permeable to the pores of the oxide film. When insoluble copper salts are precipitated in the pores, diffusion and migration of Cu2+ ion are surpressed and bath voltage rises introducing a high bipolar in the pores. This might be interpreted by the fact that the metallic deposit occurred at the anolyte side of the oxide film. Once the metallic deposit has begun in the pores, further metallic deposit is able to continue by the electronic conduction of the metal itself.抄録全体を表示PDF形式でダウンロード (711K) -
小西 三郎, 由利 隆英1975 年 26 巻 5 号 p. 229-234
発行日: 1975/05/01
公開日: 2009/10/30
ジャーナル フリーStudies were made on the corrosion resistance of chromium plating from low concentration CrO3 bath (CrO3 50g/l, H2SO4 0.5g/l, and Na2SiF6 0.5g/l), and the following results were obtained. The corrosion resistance of chromium plating from a low concentration CrO3 bath was not different from that obtained from a high concentration CrO3 bath; when the latter plating after its further treatment was in the same kind and the same thickness as that of the former plating. When a sample of the former chromium plating was taken out of the bath immediately after plating, a chromate film remained on the surface of sample. This plating with chromate, as such, showed a very high resistance, which was almost in the same degree as that of the latter chromium plating with a chromate film produced by electrolysis of the primary chromium plating from a high concentration CrO3 bath. In general, one of the causes for giving high corrosion resistance of any metal with a chromate film would be due to the following reasons: The potential of that metal in a corrosive solution is several tens or hundreds times mV nobler than its spontaneous potential, and this potential is kept for a long time even though the chromate film is in very small thickness.抄録全体を表示PDF形式でダウンロード (708K) -
Hideo NAGASAKA, Kazuo ISAWA, Yukio ENDO, Masatsugu MAEJIMA1975 年 26 巻 5 号 p. 235-237
発行日: 1975/05/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (300K)
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