巻号一覧
30 巻, 9 号
選択された号の論文の6件中1～6を表示しています
- |<
- <
- 1
- >
- >|
-
永山 政一, 高橋 英明, 甲田 満1979 年 30 巻 9 号 p. 438-456
発行日: 1979/09/01
公開日: 2009/10/30
ジャーナル フリーIn this paper the authors have attempted to present a coherent picture of the present knowledge of ‘anodization of aluminum’ based upon the research conducted at Hokkaido University during the past fifteen years. General background for the research, and typical experimental results obtained with acidic and neutral solutions, which produce porous type and barrier type films, are described. The mechanism of film formation and its dissolution, and the composition and properties of the formed oxide are discussed with special attention to the following problems: (1) Initiation and growth of pores in the initial periods of anodizing, (2) Effect of electrical field on the dissolution of oxide, (3) Distribution of electrolyte anions in the oxide, (4) Transport of Al3+and O2- ions in the barrier layer during anodization. The authors demonstrate, in many aspects, that the mechanism of oxide formation is the same for both types of films, and that the porous type films are formed only in the special case where there is local dissolution of oxide, produced by the electrical field.抄録全体を表示PDF形式でダウンロード (4319K) -
吉田 勝可, 塚原 靖夫, 小山 堅司1979 年 30 巻 9 号 p. 457-461
発行日: 1979/09/01
公開日: 2009/10/30
ジャーナル フリーThe composition and chemical states of cathode films on chromium plating were investigated by ESCA. The difference of anion distribution between the loose film and the compact film was confirmed more clearly than by radio isotope method. It was found that the anion content is high on the surface of the loose film and decreases only slightly with the depth into film, but decreases very steeply in the compact film. The degree of reduction of chromium compound was not defined clearly in each position of the cathode film, however a lot of zero-valent chromium was found in the compact film. This fact suggests that the chromium complex in the compact film may be composed of low valency chromium compounds. On the basis of these observations, the distribution of electric potential and anions in the cathode film are discussed.抄録全体を表示PDF形式でダウンロード (583K) -
佐藤 敏彦, 福久 孝治1979 年 30 巻 9 号 p. 462-466
発行日: 1979/09/01
公開日: 2009/10/30
ジャーナル フリーDeformation of alternating current waves has been observed when so called ‘a. c. oxide films’ are formed on aluminum in acid solutions. Similar deformation was also recognized in an electrolytic coloring process in which anodized aluminum specimens were treated with altenating current in a solution containing metal ions. In this investigation, the authors have developed a new method to analyze the deformed current waves by measuring ‘Differential Lissajous’ Figures' with a special differentiation circuit. The method has an important advantage of indicating the Faradaic part of a. c. on a synchroscope. Results of experiments obtained for a. c. anodizing and a. c. coloring processes are described.抄録全体を表示PDF形式でダウンロード (2234K) -
糸井 康彦, 佐藤 栄一1979 年 30 巻 9 号 p. 467-469
発行日: 1979/09/01
公開日: 2009/10/30
ジャーナル フリーThe relationship between the interfacial impedance and the corrosion resistance of anodic oxide films on aluminum sealed in boiling water was investigated. Experiments were carried out as follows; The interfacial impedance was measured in 0.5M sodium chloride solution, and the dipping test was made in sodium chloride solution containing copper (II) chloride. The impedance of anodic oxide films sealed in boiling water was determined by measuring the amplitude and phase shift of a. c. voltage and current impressed between the specimen and the Pt-Pt electrode. The measurement was made in a frequency range from 5Hz to 3000Hz. Thus electrical properties of anodic oxide films sealed in boiling water have been studied by using complex impedance diagrams, and resistance (Rs), reciprocal of capacitance (1/Cs) and dielectric loss (tanδ) was calculated from the frequency responce. During sealing, Rs and 1/Cs increased linearly with time at all frequencies. Dielectric loss at 10Hz was increased, but was decreased at 100Hz and 1000Hz during sealing. From these variations of tanδ, Rs and 1/Cs at 10Hz, it seems that the low-frequency resistivity of oxide/electrolyte interface was seen at 10Hz, and then it was estimated that the increasing rate of Rs was proportional to the decreasing rate of radius of pore.抄録全体を表示PDF形式でダウンロード (385K) -
田中 良平1979 年 30 巻 9 号 p. 470-476
発行日: 1979/09/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1493K) -
カンメル ローランド, リーバー ハンスウィルヘルム, 山内 睦文, 沖 猛雄1979 年 30 巻 9 号 p. 477-489
発行日: 1979/09/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1846K)
- |<
- <
- 1
- >
- >|