巻号一覧
30 巻, 1 号
選択された号の論文の8件中1～8を表示しています
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松本 誠臣1979 年 30 巻 1 号 p. 2-11
発行日: 1979/01/01
公開日: 2009/10/30
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糸井 康彦, 佐藤 栄一1979 年 30 巻 1 号 p. 12-16
発行日: 1979/01/01
公開日: 2009/10/30
ジャーナル フリーAluminum specimens were treated chemically for 20min with (1) pure water, (2) sodium aluminate solution, and (3) sodium aluminate solution bubbled with CO2 during the treatment. Each specimen was then examined by infrared reflectance spectra (IRRS), scanning electron microscopy (SEM) and X-ray diffraction. The films formed in the solutions (1), (2) and (3) at 95°C as well as in the solution (2) at 50°C were proved to be boehmite, whereas no boehmite was detectable in the case of the treatment in the solution (1) and (3) at 50°C.抄録全体を表示PDF形式でダウンロード (1179K) -
井川 進, 内甑 安男, 井上 徹1979 年 30 巻 1 号 p. 17-21
発行日: 1979/01/01
公開日: 2009/10/30
ジャーナル フリーA new type of Hull cell, which can minimize the temperature rise in high current electrolysis, has been constructed and compared with two kinds of Hull cells commonly used at present. A printed circuit board divided into twenty portions was employed as the Hull cell panel to measure the potential and current distributions on the cathode. It was found that, by using this cell, the temperature variations in the cell were able to be controlled within a small range, and yet the current distribution was not disturbed even in the baths which require high current such as for chromium plating. The current distribution was measured easily, with a high input impedance electrometer, by dividing the panel accurately into twenty portions and connecting each portion with a very small (1.2mΩ) resistance. The current density distributions measured for copper sulfate bath and Watt's bath were similar to those as calculated from Nagasaka's formula.抄録全体を表示PDF形式でダウンロード (642K) -
井川 進, 内甑 安男, 井上 徹1979 年 30 巻 1 号 p. 22-26
発行日: 1979/01/01
公開日: 2009/10/30
ジャーナル フリーPotential and current distributions on the cathode panel of the Hull cell have been measured, using a chromium plating solution, with reference to the surface states of the cathode. In common Hull cell tests, several current waves which appear in I-E curves are represented on the single panel of the cell, and thus the actual current distribution differs from the primary one. In the case that chromium metal is deposited over the almost entire surface of the Hull cell panel (more than 8cm from the high current density edge), the current distribution (i) can be approximately shown by the following equation:
i=5(5.8-4.7log10x)1≤x≤8
where x is the distance from the high current density edge.
In the complicated film deposited from the plating bath with an addition of less than 3g/l Na2SiF6, a gray film portion through which current can pass more easily than through other parts and the potential of which is more noble than those of the both ends, has been recognized.抄録全体を表示PDF形式でダウンロード (704K) -
吉村 長蔵, 野口 駿雄1979 年 30 巻 1 号 p. 27-32
発行日: 1979/01/01
公開日: 2009/10/30
ジャーナル フリーThis report deals with the investigations on formation of a thick anodic coating on aluminum in alkaline solutions (NH4OH-NH4F system bath: 2.5M-NH4OH, 0.1M-(NH4)2CO3' 0.2M-(NH4)2C4H4O6 (tartrate), 0.3M-NH4F, 0.005M-Al2(SO4)3' Na2CO3-NaF system bath: 0.1M-Na2CO3' 0.1M-Na2C4H4O6 (tartrate), 0.1M-NaF, 0.2M-NaAlO2' Na3PO4-NaF system bath: 0.1M-Na3PO4' 0.1M-Na2C4H4O6 (tartrate), 0.1M-NaF, 0.1M-NaAlO2) containing polyhydric alcohols or oxidizing agents. In the NH4OH-NH4F bath containing ammonium vanadate, a thick film (about 29μm) was obtained by anodizing for 30°C at a current density of 4A/dm2. In the Na2CO3-NaF bath, a thick film (about 13μm) was formed by anodizing for 30min at 30°C at a current density of 3.5-1.5A/dm2 when both glycerol and potassium hexacyanoferrate (111) are added to the bath. In the Na3PO4-NaF bath, a thick film (about 12μm) was formed with addition of both sorbitol and sodium chromate.抄録全体を表示PDF形式でダウンロード (1095K) -
寺内 俊太郎, 宮下 文彬, 宮谷 義六, 亀井 清1979 年 30 巻 1 号 p. 33-37
発行日: 1979/01/01
公開日: 2009/10/30
ジャーナル フリーThe effect of alloying elements, Fe, Co, Ni, Cr, Mn, Sn, Al, Nb, Ta, V, and Zr, at additions of 1, 3, and 5wt%, has been determined on the corrosion of Ti-Mo alloys by the steeping test, measurement of anodic polarization characteristics, and observation of the test piece surfaces after the steeping test. Addition of Nb, Ta, V, or Zr to the Ti-15Mo base alloy produced the alloys highly resistant to boiling HCl. Preferential attack at the grain boundaries was not observed with the Ti-15Mo-5Nb alloy; the type of corrosion was general corrosion. Corrosion resistance of Ti-15 Mo binary alloys, however, was found to be lower than that of the Ti-15 Mo binary alloys. Polarization curves for the highly corrosion resistant Ti-15 Mo base ternary alloys, containing Zr, Nb, V, or Ta as an alloying element, indicate that the passivation potential decreases in the order of Zr, Nb, Ta, and V. The maximum potential value was obtained at an addition of 1wt% of each alloying element. The secondary passivation range was observed in the polarization curves for all alloys tested, but the effect of the alloying elements was not recognized.抄録全体を表示PDF形式でダウンロード (1454K) -
小西 三郎, 後藤 修一1979 年 30 巻 1 号 p. 38-43
発行日: 1979/01/01
公開日: 2009/10/30
ジャーナル フリーFor the quantitative analysis of each component in the trivalent chromium plating solution the following simple and prompt procedures have been established. The amount of Cr (III) is determined by chelatometry with EDTA. HCOO is determined by the oxidation reduction titration with KMnO4 after removal of NH4 and Cr (III) by utilizing alkalis. Br and Cl are determined by the succesive potentiometric AgNO3 titration with AgNO3 using the halide electrode. Br, NH4 and H3BO3 are calibrated by using bromide, ammonia and fluoroborate electrode, respectively. But H3BO3 is determined after conversion to HBF4 with HF. According to these methods, six components, Cr(III), HCOO, Br, Cl, NH4 and H3BO3 in the trivalent chromium plating solution can be analysed within an hour.抄録全体を表示PDF形式でダウンロード (730K) -
馬場 宣良1979 年 30 巻 1 号 p. 44-51
発行日: 1979/01/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1643K)
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