巻号一覧
25 巻, 8 号
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松永 正久1974 年 25 巻 8 号 p. 424-427
発行日: 1974/08/01
公開日: 2009/10/30
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江口 晴一郎, 浜口 隆信, 沢田 重政, 青木 啓, 佐藤 幸弘1974 年 25 巻 8 号 p. 428-437
発行日: 1974/08/01
公開日: 2009/10/30
ジャーナル フリーElectron binding energies of Al, O, and S atoms in anodic oxide films formed on aluminum in aqueous solutions of H2SO4, Na2SO4, NH4HB4O7, Na2SO3, etc. at constant current densities were measured by means of X-ray photoelectron spectroscopy. The results obtained were as follows: 1) Binding energies of Al2P, Al2S and O1S electrons in anodic oxide films formed on Al in sulfuric acid were located at 74.9, 119.9 and 532.2eV, respectively. The binding energies were measured under the same condition as above in the anodic oxide films formed in other electrolytes. As the results, the binding energy of Al2P electron in anodic oxide films shifted by 0.3eV from the energies of Al oxides (αAl2O3=βAl2O3=γAl2O3:74.6eV) or of anodic oxide films sealed with boiling water. 2) Binding energies of S2P electron of sulfate in anodic oxide films formed on Al in aqueous solutions of H2SO4, Na2SO4, KAl(SO4)2·12H2O, NaHSO3, Na2SO3, and Na2S2O3·5H2O were located at 169.8, 170.1, 170.1, 168.4, 168.6 and 168.4eV, respectively.抄録全体を表示PDF形式でダウンロード (1314K) -
江口 晴一郎, 浜口 隆信, 沢田 重政, 水野 利昭, 佐藤 幸弘1974 年 25 巻 8 号 p. 437-442
発行日: 1974/08/01
公開日: 2009/10/30
ジャーナル フリーThe amount of sulfate incorporated into the anodic oxide films formed on Al in sulfuric acid solution was estimated by ESCA. The ratio of total peak count (c/s) of S2P electron to that of Al2P electron in the Al oxide films was discussed with respect to the change of anode potential during the secondary electrolysis of the primarily oxidized films on Al. The results obtained were as follows. Sulfate was detected in the anodic oxide films formed in the sulfuric acid solution during the increase of anode potential in the early stage of electrolysis, and the binding energy of S2P electron was found to be 169.8eV. On the other hand, the amount of sulfate in the anodic oxide films during the decrease of anode potential in electrolysis was much smaller than that during the increase of anode potential.抄録全体を表示PDF形式でダウンロード (915K) -
尾上 秀夫, 中島 修, 松野 武雄1974 年 25 巻 8 号 p. 442-446
発行日: 1974/08/01
公開日: 2009/10/30
ジャーナル フリーThe corrosion resistance of Pt-electroplated Al specimens pretreated in an anodic oxidation bath containing 30% of H3PO4 or 15% of H2SO4 (at -6-40°C) was studied under various conditions of plating and anodic oxidation. The Pt-plating bath was called Pfanhauser's solution, containing H2PtCl6·6H2O 34.33g, (NH4)2HPO4 30.00g, and Na2HPO4·12H2O 300.00g in 1000ml. After plating for 1min, under 10±0.5Amp/dm2 (at 70±2°C), the Al specimen was taken out of the bath and polished with an emery paper (8/0). Then, it was again dipped in the above plating bath. The specimen, which had been plated for three times of the above 1min. operating cycles (average thickness: 2μ), was observed as plane as a smooth platinum by examination under microscope (×100). According to the corrosion resistance tests of Pt-plated Al specimens in HCl(pH=3) at 80±1°C for 1hr., it was found that the anodic oxidation time was optimum at 30min, for 99.84% Al and 60min, for 99.9% Al, and the temperature of anodic oxidation was optimum at -6°C.抄録全体を表示PDF形式でダウンロード (1834K) -
福島 敏郎, 福田 芳雄, 伊藤 伍郎, 岡田 雅之1974 年 25 巻 8 号 p. 447-452
発行日: 1974/08/01
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 dicarboxylic acid solutions at bath temperature between 20°C and boiling point and with bath concentration 0.01M/l- the saturated aqueous solution. Porous but thick uniform oxide coatings were obtained in malonic and maleic acid baths under the conditions of relatively high temperatures and high concentrations. Micropores of the coatings produced in those baths existed straightly along the rolling structure of aluminum sheet. At low temperatures and low concentrations, however, the anode was locally attacked and pittings or burnings were caused as a result of local formation of the porous coatings. In the baths of succinic, fumaric, glutaric, adipic, pimeric, suberic, azelaic, sebacic and phthalic acid, the uniform coatings could not be obtained and the local attack of the anode occurred. Bath voltage in the acid of even C number is higher than that in acid of odd C number of the nearest neighbors. With the acids of high C number such as C8-C10, it was observed electronmicroscopically that the surface structure of the barrier layer was similar to that of borate coating.抄録全体を表示PDF形式でダウンロード (855K) -
小泉 宗栄, 上田 重朋1974 年 25 巻 8 号 p. 452-457
発行日: 1974/08/01
公開日: 2009/10/30
ジャーナル フリーThis paper describes the effect of a control of initial current density, and a thickness and an area of specimens, on the formation of abnormal layer. Aluminum specimens (JIS 1100-H 24) were anodized for a prolonged period in a bath of the H2SO4 containing H2C2O4 at -5°C.
The scanning electron micrographs show that the normal layer in the coatings consists of regular cell structures, while the abnormal layer consists of crooked and uneven cell structures. The cause of formation of the abnormal layer is supposed to be a process of break-down of coatings. The wear test shows that the thicker abnormal layer gives an inferior effect on wear resistance. A suitable control of initial current density is effective precaution for abnormal layer because of a uniformity in the barrier layer thickness. There seems to be greater tendency to form the abnormal layer at thin specimens of 1.0mm than thick ones of 2.0mm and more. The rate of coatings growth is greater at specimens of small area (100mm×25mm) than ones of large area (100mm×100mm), therefore the abnormal layer is easily formed at specimens of small area for prolonged electrolysis.抄録全体を表示PDF形式でダウンロード (1523K) -
阿部 隆, 相沢 浩司, 内山 利光, 礒山 永三, 村川 享男1974 年 25 巻 8 号 p. 458-459
発行日: 1974/08/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (231K)
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