巻号一覧
26 巻, 10 号
選択された号の論文の7件中1～7を表示しています
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北條 英光1975 年 26 巻 10 号 p. 432-436
発行日: 1975/10/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1411K) -
小山 清, 石川 正己, 榎本 英彦, 西村 正人, 中川 融1975 年 26 巻 10 号 p. 437-440
発行日: 1975/10/01
公開日: 2009/10/30
ジャーナル フリーLaboratory studies were made of recovery and reuse of the rinsing water produced by reverse osmosis and ion exchange process in tin-nickel alloy plating operations. The tin-nickel plating bath used was pyrophosphate. The rejection rate of each of Ni2+and Sn2+was not less than 99% by the reverse osmosis with cellulose acetate membranes. The critical concentration of chemicals by the reverse osmosis in practice was estimated to be one half of the original bath concentration. The quality of the liquid passed through the permeation was so good as to be reused in the rinsing process. The deterioration of membrane performance was not found during the contact with the rinsing water for 350hrs. The authors proposed a suggestion for the closed process of tin-nickel alloy plating that it was found possible to effect almost complete recovery of chemicals and direct feed back of the concentrated product into the plating bath.抄録全体を表示PDF形式でダウンロード (467K) -
土肥 信康, 小幡 恵吾1975 年 26 巻 10 号 p. 441-445
発行日: 1975/10/01
公開日: 2009/10/30
ジャーナル フリーThe range of operating conditions suitable for electroplating of bright tin-lead alloys from a phenolsulfonate bath was determined by measuring the bright area percentage of a Hull Cell test panel, tin content in the deposit, and throwing power. The operation was conducted under the following conditions: totalmetal 15-25g/l, free acid 80-120g/l, a non-ionic surface active agent 10-40g/l, a brightener (a condensation product of o-toluidine with acetaldehyde-20% solution in isopropyl alcohol) 15-40ml/l, acetaldehyde (20% aqueous solution) 4-8ml/l, current density 1-6A/dm2, and bath temperature 15-25°C. Under the operating conditions described above, the tin percentage of deposited alloys was nearly equal to that in the bath. The tin percentage was led to be slightly higher by the lack of surface active agent or acetaldehyde, and to be slightly lower by the lack of brightener. The cathode current efficiency was high in the range of 1-3A/dm2 of current density when agitation was applied, but it decreased with the increase of current density above 3A/dm2.抄録全体を表示PDF形式でダウンロード (776K) -
元島 栖二, 越智 豊, 鈴木 信幸, 高橋 康隆, 杉山 幸三1975 年 26 巻 10 号 p. 446-450
発行日: 1975/10/01
公開日: 2009/10/30
ジャーナル フリーCarbon fibers coated with titanium carbide were obtained by direct titanization of carbon fibers in a gas mixture of titanium tetrachloride and hydrogen. Influence of such factors as the thickness of coating layer, titanizing temperature, gas composition, on the oxidation resistivity and tensile strength of the coated fibers are discussed. 1) Oxidation resistivity was improved with the thickness of TiC layer, but tensile strength get worse in the opposite way. 2) Maximum oxidation resistivity and tensile strength were obtained at temperatures of about 1150°Cand 1100°C, respectively, in the case of thickness of TiC layer 1μ. 3) Oxidation resistivity was improved with the increase of TiCl4 in the coating atmosphere. 4) Oxidationproceeded mainly through pinholes or cracks except for thin layer as 0.3μ.抄録全体を表示PDF形式でダウンロード (2443K) -
渡辺 孝, 垂水 英一, 津田 精三1975 年 26 巻 10 号 p. 451-455
発行日: 1975/10/01
公開日: 2009/10/30
ジャーナル フリーThe terne sheet coated with a Pb-Sn alloy by hot dipping is a metalcoated sheet steel of typical cathodic type, and there will exist a possiblity that pitting corrosion occours in the presence of pin-holes. Then, the authors studied on chemical conversion treatments of terne sheet, which brought about satis-factory results. It was found that the pitting corrosion was markedly prevented bya treatment with dilute phosphoric acid. As the result of the treatment, the corrosion resistance of terne sheet was remarkably promoted by the formation of conversion coated thin film. The results obtained were as follows: (1) The conversion coated film had water repellent property. (2) The constituents of the coated film were mainly Pb5 (OH) (PO4)3 and a little amount of Sn3 (PO4)2. (3) The promotion of corrosion resistance of the terne plate was due to the filling up of the pin-holes with these reaction products as well as its water-repellent property.抄録全体を表示PDF形式でダウンロード (2231K) -
小野 幸子, 千秋 秀一, 佐藤 敏彦1975 年 26 巻 10 号 p. 456-460
発行日: 1975/10/01
公開日: 2009/10/30
ジャーナル フリーThe structure of anodic oxide films on aluminum formed in chromic acid solution at constant voltage, and under various electrical or electrolytic conditions, has been studied by electron microscopy. Electron micrographs of film section replica showed that pore branching and subsequent colony structure was formed during anodizing. With film growth, pore colony took hemispherical shape, which resembles to that of barrier layer bottom in typical porous type oxide film, at metal-oxide interface. These film structures were not in accord with vertical structure model proposed by Keller et al. A form of branching pore structure depended on anodizing voltage, the higher the applied voltage, the sooner the initiation of pore branching and colonial structure. The formation of branching colonial structure was strongly favored by following conditions. (1) Sudden voltage drop during anodizing (that is colled Recovery Effect). (2) Anodizing after formation of preliminary thick barrier layer, for instance, primary anodization was done in ammonium tartarate solution. The second anodizing voltage in chromic acid solution was lower than that of preliminary one. The facts suggest that the cause of pore branching is due to the film growth through thick barrier layer.抄録全体を表示PDF形式でダウンロード (2729K) -
宮田 聰1975 年 26 巻 10 号 p. 461-465
発行日: 1975/10/01
公開日: 2009/10/30
ジャーナル フリーVarious tests of aluminum coatings electrodeposited on titanium (Ti-6Al-4V) were performed based on the NAS 4006 specification. The tests were successively carried out in the following sequence. 1) film thickness, 2) appearance, 3) adhesion, 4) fluid resistance, 5) paint stripper resistance, 6) embrittlement, 7) corrosion protective properties, 8) heat resistance. The results met the requirement of the NAS specification well and the aluminum coatings thus formed were satisfactorily used.抄録全体を表示PDF形式でダウンロード (2370K)
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