巻号一覧
37 巻, 3 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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片田 元己, 佐野 博敏1986 年 37 巻 3 号 p. 94-102
発行日: 1986/03/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1133K) -
東 光郎1986 年 37 巻 3 号 p. 103-109
発行日: 1986/03/01
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1066K) -
内山 利光, 礒山 永三, 大塚 達雄, 竹中 博一, 溝口 政秋1986 年 37 巻 3 号 p. 110-114
発行日: 1986/03/01
公開日: 2009/10/30
ジャーナル フリーThe mechanism by which corrosion begins in sulfate anodized films, boehmite films and other typical aluminum surface films has been studied, primarily by microtome and by scanning and transmission microscopy of cross-sections of corroded portions. CASS and salt spray testing were chosen as corrosion tests.
It was found that corrosion of oxide films on aluminum did not depend on the type of film, on whether or not holes had been sealed, or on the type of material alloy, but proceeded in the aluminum underlying the film. The film on areas remaining unaffected after corrosion tests was free of dissolution and other damage, and IMA of Cl ion distribution in the film revealed no permeation to the film substrate. It is, therefore, suggested that corrosion under such conditions results from microdefects in the film, and that the corrosive materials permeate through these defects, reacting with the aluminum base material to start corrosion.
The present study also made it clear that changes in the corrosion conditions result in changes in the corrosion mechanism, indicating that even when aluminum is surface treated, it will exhibit a variety of corrosion mechanisms depending on the environment in which it is used.抄録全体を表示PDF形式でダウンロード (3013K) -
島田 昌治, 川口 明廣1986 年 37 巻 3 号 p. 115-120
発行日: 1986/03/01
公開日: 2009/10/30
ジャーナル フリーElectrochemical descaling of annealed stainless steel using electrolytes consisting of H2SO4, Na2SO4 and NaNo3 was studied as a function of the ratio of the constituents. Clear multiple power correlations were found between the amounts of the scaled or polished steel dissolved and the molar fractions of the constituents. The contour bands of the dissolution amount were illustrated on tripolar coordinate diagrams for the H2SO4-NaSo4-NaNo3 system. By adjusting the composition of the electrolyte, ca. 0.1μm thick scaled 13-Cr stainless steel was electrochemically descaled under conditions of 25-35Adm-2 in 5-10sec.抄録全体を表示PDF形式でダウンロード (907K) -
水本 省三, 縄舟 秀美, 川崎 元雄, 木下 朱美, 荒木 建1986 年 37 巻 3 号 p. 121-125
発行日: 1986/03/01
公開日: 2009/10/30
ジャーナル フリーThe mechanical properties and reliability under thermal shock test of copper films deposited from electroless plating baths containing a large quantity of glycine and potassium hexacyanoferrate (II) were investigated. The films obtained were shown to have nearly the same elongation and ultimate tensile strength as commercial electrolytic copper foil. From baths containing [Fe(CN)6]4- of 0.01mol/L and such, ductile deposits were obtained even at temperatures as low as 50°C. Printed circuit boards prepared by full- and partly-additive methods from baths as prepared above were shown to have good reliability under thermal shock test.抄録全体を表示PDF形式でダウンロード (1252K) -
石沢 真樹, 中村 孔三郎1986 年 37 巻 3 号 p. 126-130
発行日: 1986/03/01
公開日: 2009/10/30
ジャーナル フリーMagnetic media having Ba-ferrite coatings of various magnetic properties and particle size was investigated for the purpose of attaining higher recording density and durability. It was found that media having Ba-ferrite coatings with a coercivity Hc of 730 Oe and an average particle diameter of 0.05μm has good short-wavelength response. Using a narrow-gap ring-shaped head, a recording density D50 of 34 KFRPI was obtained, and the other read-write properties-overwrite, resolution and modulation-also showed good response. And through the use of a binder system and dispersion agent suitable for Ba-ferrite particles, the magnetic media maintains a durability of more than 8 million passes.抄録全体を表示PDF形式でダウンロード (1734K) -
久保田 淳, 小浦 延幸1986 年 37 巻 3 号 p. 131-136
発行日: 1986/03/01
公開日: 2009/10/30
ジャーナル フリーA new bath for the electroless plating of silver has been investigated. Optimum bath composition and plating conditions were: silver nitrate 8.8×10-3M, ethylenediamine 5.4×10-2M, Rochelle salt 3.5×10-2M, 3, 5-diiodotyrosine 4×10-5M, pH10.0 and temperature 35°C. The most important additives for bath stability were 3-iodotyrosine and 3, 5-diiodotyrosine.
Bath life was strongly affected by pH. The effect of pH on the oxidation of reducing solutions without silver nitrate was examined by measuring the rest potential of silver and platinum electrodes. The coexistence of intermediates with the active hydrogen in the process of the oxidation of the reducing agent was predicted, and measurements of the UV absorption spectra of the reducing solution suggested that pH influences the structure of ionic species in the solution.抄録全体を表示PDF形式でダウンロード (1171K) -
谷原 紘一, 安田 誠二, 西久保 桂子1986 年 37 巻 3 号 p. 137-143
発行日: 1986/03/01
公開日: 2009/10/30
ジャーナル フリー(1) [Fe(CN)6]3- in aqueous solution was efficiently removed as Zn2Fe(CN)6 by reducing it with a mixed reducing agent of sulfite and thiosulfate ions (1:1) in the presence of Zn2+. In this process, moreover, trace amounts of Cu2+ were found to accelerate the reduction of [Fe(CN)6]3- markedly owing to a synergistic action with Zn2+.
(2) The above process was applied to the removal of the remaining [Fe(CN)6]3- after alkaline chlorination of waste water from cyanide zinc electroplating solutions. As a result, total cyanide concentration was reduced to a level of less than 0.1ppm except when Ni was present, and it was possible to automate the whole operation from alkaline chlorination to the remeval of [Fe(CN)6]3-.
(3) The volume of cyanide-bearing sludge produced by the treatment of electroplating waste water containing cyanides can be greatly decreased by the above process involving the reduction of [Fe(CN)6]3- in the vicinity of pH6, followed by separation of the precipitate formed.
(4) In processing electroplating waste water containing Ni, the primary alkaline chlorination treatment should be carried out by a batch process to make sure that the destruction of [Ni(CN)4]2- is complete.抄録全体を表示PDF形式でダウンロード (870K)
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