巻号一覧
12 巻, 2 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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金属材料の電解研摩に関する研究 (第7報)松本 誠臣1961 年 12 巻 2 号 p. 37-39
発行日: 1961/02/20
公開日: 2009/10/30
ジャーナル フリーElectropolishing of various metals in phosphoric acid-chromic acid bath was investigated. In this paper, the result of the studies of electropolishing effects on nickel steels, silicon steels and manganese steels in the above bath are reported as follows:
1) Electropolishing of the above metals in the phosphoric acid-chromic acid bath which was applied to carbon steels, copper alloys and auminium alloys, are good with low bath voltage and low anode current density,
2) On castings of these metals, however, electropolishing effect is not good without for the crystlline textures are coarse, but it is improved after heat treatment of the castings.
3) It is very easy to polish nickel steels.
4) Silicon in silicon steel seems to be oxydized to silica and dissolved as colloid at the anode in the above bath, and then the silicon steel being polished.
5) Manganese steels should be treated at low current density and in short treating time in order to prevent the slective dissolution of manganese carbide.抄録全体を表示PDF形式でダウンロード (926K) -
金属材料の電解研摩に関する研究 (第8報)松本 誠臣1961 年 12 巻 2 号 p. 39-42
発行日: 1961/02/20
公開日: 2009/10/30
ジャーナル フリーElectropolishing of cast iron is seldom applied, for its throwing power is very poor due to the intricate structures such as ferrite, cementite and graphite. Especially, electropolishing effects depend on the distribution of graphite on the surface of cast iron. The author, however, investigated the electropolishing of cast iron in phosphoric acid-chromic acid bath and caustic soda-sodium dichromate bath.
The results are as follws:
1) The same smooth surface as in the case of carbon steel is obtained if acid or alkaline bath is used according to the quantity of graphite contained in the cast iron.
2) Malleable cast iron can well be electropolished in both acid and alkalline bath with oxydizing agent such as chromic acid or sodium dichromate.
3) Cast iron as cast has not much graphite but its crystalline structure is coarse, so that the bright surface by electropolishing cannot be obtained, which would be much improved by heat treatment of the cast iron.抄録全体を表示PDF形式でダウンロード (1092K) -
電子顕微鏡によるアルミニウム表面処理工程の研究 (第1報)赤堀 宏, 宮内 圭二1961 年 12 巻 2 号 p. 42-47
発行日: 1961/02/20
公開日: 2009/10/30
ジャーナル フリーOut of aluminum surface treatment processes, the buffing and alkaline cleaning process was picked up and the state of the surface was observed through an electron microscope.
1) Rate of reflection after polishing varies depending on the kind of abrasive which is used for buffing, and variation of the finishing result can be observed with naked eyes. According to the observation through an electron microscope, less variation of the rate of smoothness between the two treatments mentioned above can be recognized. But it is proved that reflection and refraction are influenced by an abrasive and others which have eaten into Beilby Layer.
2) Buffed surface coated with oils and fats, hinders anodic treatment and chemical treatment. It was observed through an electron microscope that how the widely used alkaline cleaning affects aluminun. Concerning the cleaning effects of NaOH, Na3PO4, Na3CO3 and the like that corrode aluminum, it was found that H2 gas which was produced when they reacted on aluminum, acts to take the oil and fat coat film off. Also it was found that the effect of sodium silicate which was used for the purpose of preventing alkaline corrosion formed a solid silicate film on the surface of aluminum and this film was the cause of rough surface from anodic treament.抄録全体を表示PDF形式でダウンロード (3565K) -
電着応力に関する研究 (第4報)小西 三郎1961 年 12 巻 2 号 p. 47-52
発行日: 1961/02/20
公開日: 2009/10/30
ジャーナル フリーSome relations beween hardness and stress was found to exist in nickel deposits as follows:
1) Of the nickel deposit from the bath without brightener the hardness (Hv 180-370) and stress (15-65×103psi) are proportional.
2) Of the deposit from Watt's bath added with the first class brightener the stress is changed to compressive stress and its hardness is increased. In this case, the bigger the compression stress (-2- -13×103psi) is, the greater is the hardness (Hv 200-500).
3) In general, of the deposit from the bath containing both the first and second class bightener, hardness (Hv 450-700) and stress (-10-50×103psi) is increased with an increase of the secomd class brightener.
4) In all the above three cases, the bigger the stress is, the greater is the hardness.
5) Agitation of the bath generally causes the hardness and stress to increase.
6) Of the deposit from the bath added with some kind of surface active agent the stress is decreased, but the hardness increased.抄録全体を表示PDF形式でダウンロード (1241K) -
加瀬 敬年1961 年 12 巻 2 号 p. 53-58
発行日: 1961/02/20
公開日: 2009/10/30
ジャーナル フリーSome properties of the brightener and electrodeposit in bright nickel plating are investigated.
The result obtained is as follows:
1) The behavior of brightener was observed by using inhibiting action, and it was found that, except thiourea, the brightener showed greater cathodic polarization than anodic polarization, so that it was adsorbed preferentially by cathode. It is, therefore, better to select brighteners from the group of elements which are adsorbed preferentially by cathode.
2) Except the deposit from Co-Ni alloy bath, the higher the hardness of bright deposit is, the more cracks appear.
3) The oriention of bright deposit is (111) and (200), but that from Co-Ni alloy bath is (111) only, and their microstructure is smaller than the wave length of visible light.抄録全体を表示PDF形式でダウンロード (1543K) -
長谷川 和男1961 年 12 巻 2 号 p. 59-62
発行日: 1961/02/20
公開日: 2009/10/30
ジャーナル フリーBy oxidation of solution of phosphoric acid and potassium permanganate in hot condition, sulfonic acid sodium salt and sulfonamide are changed to SO4-- that precipitates as BaSO4, then sulfonic acid sodium salt and sulfonamide are determined by weighing of BaSO4.
At 180-200°C sulfonic acid sodium salt and sulfonamide are decomposed, and the end point of the decomposition is indicated by the change of the phase of solution's by which the quantity of sulfo-compounds in a bright nickel plating bath can easily and accurately be determined.抄録全体を表示PDF形式でダウンロード (548K) -
斎藤 囲1961 年 12 巻 2 号 p. 63-69
発行日: 1961/02/20
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1090K) -
倉藤 尚雄1961 年 12 巻 2 号 p. 69-73
発行日: 1961/02/20
公開日: 2009/10/30
ジャーナル フリーPDF形式でダウンロード (1637K)
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