巻号一覧
31 巻, 1 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
- >
- >|
-
佐藤 敏一1980 年 31 巻 1 号 p. 2-11
発行日: 1980/01/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (2321K) -
佐藤 敏彦, 酒井 茂1980 年 31 巻 1 号 p. 12-16
発行日: 1980/01/01
公開日: 2009/10/30
ジャーナル フリーAnodized aluminum was electrolytically colored in a nickel sulfate-boric acid mixed bath by direct current. Impedance of the colored film was measured in the coloring bath. Impedance of the colored film depended upon the coloring voltage and coloring time. After electrolytic coloring, the impedance of the oxide film increased. This increase is due to the change of impedance of barrier layer and impedance of electrodeposited material. When colored film was dipped in nitric acid, the oxide film was decolorized and impedance of the oxide film decreased.抄録全体を表示PDF形式でダウンロード (666K) -
浦尾 亮一, 小又 隆1980 年 31 巻 1 号 p. 17-22
発行日: 1980/01/01
公開日: 2009/10/30
ジャーナル フリーIt is difficult to nitride stainless steels with out treatments for their surfaces because they have strongly passivated surface films. An ion-nitriding method seemed to be effective for nitriding these steels, as the passivated films could be removed by ion's spattering. Stainless steels were ion-nitrided in gas mixtures of nitrogen and hydrogen in the present study. Highly hardened surface layers were obtained in short nitriding times of 1-5h. The layers had decreasing depth in order of the stainless steels of ferritic, ferrite-austenite mixing, and austenitic structures. The depth of the layers decreased with increasing chromium content in the steels. It is suggested that the precipitation of chromium nitride caused the high surface hardening of the stainless steels, because the presence of the nitride was confirmed by X-ray diffraction.抄録全体を表示PDF形式でダウンロード (2057K) -
小澤 敏夫, 大谷 大1980 年 31 巻 1 号 p. 23-27
発行日: 1980/01/01
公開日: 2009/10/30
ジャーナル フリーA simple and rapid method for analysing chromium plating solutions with a single sampling is presented. Chromium (VI) oxide, chromium (III) and impurities (iron, copper and nickel) are determined by spectrophotometric methods. The procedure involves a nearly complete separation of ions of the metals from chromium (VI) by precipitation of the hydroxides. The amount of chromium (VI) in filtrate is measured at 445nm after acidifying the solution with sulfuric acid. The precipitates of the hydroxides are dissolved in dilute hydrochloric acid, and chromium (III) is measured at 375nm after oxidizing with hydrogen peroxide in an alkaline medium of sodium hydroxide. Iron, copper and nickel in the hydrochloric solution are determined colorimetrically by the 1, 10-phenanthrolin method, the cuprizon method and the dimethylglioxime method, respectively. Direct determination of iron and copper are found to be possible by the 1, 10-phenanthrolin method and the cuprizon method in the presence of a large quantity of chromium (VI). Five samples taken from chromium plating solutions for industrial use were analyzed by conventional methods, (the titrimetric method for chromium trioxide and trivalent chromium and the atomic absorption method for iron, copper and nickel) and compared with the results obtained by the present method.抄録全体を表示PDF形式でダウンロード (1228K) -
鷹野 修, 松田 均1980 年 31 巻 1 号 p. 28-33
発行日: 1980/01/01
公開日: 2009/10/30
ジャーナル フリーThe deposition characteristics of a low temperature electroless cobalt plating bath and the magnetic properties of the deposited cobalt films have been investigated. The optimum bath composition and operating conditions were found to be; cobalt sulfate 0.1M, sodium hypophosphite 0.2M, sodium pyrophosphate 0.4M, ammonium sulfate 0.5M, bath pH10.5 (adjusted with ammonia), operating temperature 60°C. The magnetic properties of deposited films were improved when they were deposited from low temperature bath. Therefore, this type of bath was suitable to the low temperature bath for magnetic plating. The phosphorous content of Co-P films deposited from these baths was relatively high compared with that from other type of bath due to co-deposition of phosphorous from the pyrophosphate anion in the solution抄録全体を表示PDF形式でダウンロード (810K) -
田中 良平1980 年 31 巻 1 号 p. 34-41
発行日: 1980/01/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (3095K)
- |<
- <
- 1
- >
- >|