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10 巻, 1 号
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安田 幾久男1960 年 10 巻 1 号 p. 1
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーPDF形式でダウンロード (579K) -
石田 四郎1960 年 10 巻 1 号 p. 2-3
発行日: 1960/01/31
公開日: 2009/09/04
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森永 卓一, 財満 鎮雄, 高橋 恒夫, 中村 立一1960 年 10 巻 1 号 p. 4-7
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーThis study was made for finding out whether the unstable state, such as damping capacity, in early stage of aging of Al-Cu alloys or 2S aluminium takes place only in the precipitation-type super-saturated solid solution or due to thermal stress or dislocation by zuenching into water from high temperature. The measurement of damping capacity, hardness, decrement of Harbert pendulum and specific volume was made by use of 1S, 99.99% purity (poly crystals) and 99.9% purity (single crystal) aluminium.
Findings are that in the case of 1S, the change is similar to that of 2S, but in the case of 99.9% (single crystal) aluminium, Al content of which is just same as of 1S, a small flactuation is observed, and in the case of 99.99% purity metal, the properties are not changed by aging.抄録全体を表示PDF形式でダウンロード (568K) -
森永 卓一, 財満 鎮雄, 中山 正夫, 小林 昌子1960 年 10 巻 1 号 p. 8-13,21
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーAs reported in our previous paper, the condensed phosphate is usable as an adding agent to improve the anti-corrosion properties of aluminium alloys in wine and brandy. In salt water, however, this material does not show any effect, though it thows slight effect under wet-and-dry corrosion test with salt water.
Even in wine and brandy, in case they are treated by ion-exchange-resin, the abovementioned effect by condensed phosphate can not be shown so remarkably.
This time, the said effect was examined by use of acetic acid solution to find out whether the sealing property of metal is distinguished by the complex chemical reaction between be agent and the compositions or it is displayed by the simple acid solution itself, and also to obtain the finding on the particular characteristics of the condensed phosphate as an adding agent to wine, brandy and some other foods for improving anti-corrosion property of aluminium alloys.抄録全体を表示PDF形式でダウンロード (829K) -
赤ブドウ酒に対する1Sの防食効果におよぼすイオン交換処理の影響について森永 卓一, 財満 鎮雄, 加賀美 元男1960 年 10 巻 1 号 p. 14-21
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーTo know about the utilization of the ion-exchange treatment for the counter-plan to the corrosion and to find the chemical compositions which influence to the attack of wine to aluminium alloy, corrosion tests were made in red wine treated with ion exchange resin.
The ion exchange resin used were Amberlite IR-120 and Amberlite IRA-410 made by Rhon and Haas Co. The red wine was treated in “single bed system” or “double bed system”. The specimens (10×50×1mm 1S plate) were dipped in this red wine, then, the following experiments were made:
Measurement of the dissolved amount of specimen and the disappearing time of metallic briliance on the surface; Test of the change in flavour and taste of wine; Measurement of the change in pH-value or major mineral contents.
It was found out that the dissolved amount of specimen in red wine cannot be controled in particular by the ion exchange treatment, but the flavour and taste tend to be improved regardless of the time of dipping in cation exchanged wine as well as the cation exchange-anion exchanged wine.
This paper also states about the study on the corrosion resistance peoperties of 1S in the ion-exchanged red wine added with typical two sorts of poly-phosphate adding agents which seals the attack of red wine to the aluminium and improves the flavour and taste of wine as previously reported.抄録全体を表示PDF形式でダウンロード (995K) -
寺井 士郎, 馬場 義雄1960 年 10 巻 1 号 p. 22-31
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーIt is well known that the recrystallization temperature of aluminium is remarkably elevated when zirconium is added thereto. This effect is, however, very much influenced by impurities or additions of the third element.
It was found out that the addition of lithium increases the recrystallization temperature of aluminium-zirconium alloy.
1) The effect of lithium content on the recrystallization temperature of aluminium is little or none, and all the aluminium-lithium alloys, which contain lithium in the range of 0.5% to 2.0%, complete their recrystallization at about 350°C, when they are cold-rolled of more than 60% reduction.
2) Aluminium-zirconium alloys which contain zirconium up to 0.3% finish the recrystallization at about 450°C, when they are cold-rolled of more than 60% reduction.
3) Aluminium-zirconium-lithium alloys containing zirconium in the range of 0.15% to 0.25% and lithium 1.0% to 2.0% have very much higher recrystallization temperature and do not finish the recrystallization even by one hour heating at 500∼550°C.
4) As the effect of lithium contents of aluminium-manganees alloy, the elevation of the recrystallization temperature is recognized only in the case that 2% lithium is added to aluminium 1% mangenese alloy.
The effect of lithium contents on the recrystallization temperature of aluminium-manganese-zirconium alloy is also same as that of aluminium-zirconium alloy.抄録全体を表示PDF形式でダウンロード (1838K) -
森永 卓一, 高橋 恒夫, 加藤 良雄, 大森 梧郎1960 年 10 巻 1 号 p. 32-36
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーDue to its high anti-corrosion properties under room temperature and also to its high thermal resistance, the applications of aluminized steel has remarkably been increased in recent time. On its resistance to corrosion in high temperature water, however, no study has so far been made. If its high resistance in high temperature water is proved, it is well considered that the aluminized steel will get more promissible as a material for boilers, vessels for some chemicals and others.
In this connection, by use of aluminized steel plates which have deferent chemical compositions, an experiment has been made for studying on their resistance to corrosion in high temderature (250°C) distilled and city water respectively by way of measuring the degree of corrosion, electrode potential, X-ray diffraction and so on.
The findings are as follows:
1) The degree of corrosion in primary stage is different according to the chemical composition of base steel.
2) The corrosion resistance of the material in the distilled water at 245°C is little different from that in the city water at same temperature.
3) The corrosion film formed on the surface of the material is mostly composed of Böhmite (α-Al2O3·H2O), but Diaspore(β-Al2O3·H2O) is also formed a little both in distilled and city water at the temperature of 245°C.抄録全体を表示PDF形式でダウンロード (1410K) -
耐食性について佃 誠1960 年 10 巻 1 号 p. 37-42
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーThis is to report on the tests on anti-corrosion of pure magnesium, Mg-RE, Mg-Zn, Mg-RE-Zn, EK30, EZ33, ZK51, AZ63, AZ92, A10 and Mg-Mn alloys. Under these tests, the specimens of the above alloys were dipped into the solutions of 0.06 N HCl and 1N NaCl plus 3% H2O, and quantity of gas generated from the specimens by corrosion was measured.
It was found out that the magnesium alloys containing Zirconium have better anti-corrosion properties than ordinary Mg-Al-Zn-Mn alloys. This is due probably to the fact that magnesium is purified and the contained iron is excluded by Zirconium.
Subsequent experiments were made for finding out the anti-corrosive effects of various chemical treatments on magnesium alloys. The bath was prepared with solutions of 15% potassium dichromate, 0.5% hydrochloric acid, 5% nitric acide, which were kept under the temperature of 40°C.
It was found out from the above experiments that the Mg-RE-Zn alloy shows good corrosion resistance, while the above chemical treatments can not improveits anti-corrosion properties.抄録全体を表示PDF形式でダウンロード (608K) -
麻田 宏, 小森 進一, 森本 三郎, 青木 顕一郎1960 年 10 巻 1 号 p. 43-48
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーFor a study to find out the proper condition in hot rolling process magnesium slabs kept under the temperature of 350°C were rolled with the rolls heated at different surface temperature in the range of 150°C to 300°C. The maximum rolling reduction rate increased from 60% to 90% or more with the increase in temperature of the rolls.
The difference in rolling direction of mechanic properties of the sheets were decreased as the temperature in surface of the rolls was increased. When the surface temperature of rolls was kept at 300°C, the magnesium alloys could easily rolled into sheets without any intermediate annealing.
Generrally, heat-treatable high strength magnesium alloys, for example AZ91, have poor corrosion resistance.
It was attempted, therefore, to coat these alloys with high purity magnesium, which has high corrosion resistance, and to make clad sheet by hot rolling.
The favourable conditions to make them in clad form were found out as follows:
1. The temperature of surface of the rolls should be kept at 250°C∼300°C.
2. The temperature of the slabs should be at about 400°C.
3. The reduction rate for the first pass should be 50% or more.
The clad sheets thus produced had high corrosion resistance and good mechanical properties.抄録全体を表示PDF形式でダウンロード (1307K) -
麻田 宏, 岩崎 皓二1960 年 10 巻 1 号 p. 49-54
発行日: 1960/01/31
公開日: 2009/09/04
ジャーナル フリーThe effects of current density in caustic anodizing treatment (JIS Type 6) on corrosion resistance, electrical insulative properties of protective film and dimensional change in magnesium alloys in the forms of plate, sand-casting, permanent-mould casting and die-casting were investigated and compared with those in galvanic anodizing treatment (JIS Type 5) and acidic anodizing treatment (Dow specification).
Generally, the caustic anodizing treatment produces the best coating film on magnesium alloys in all forms except in die-casting for which acidic solution treatment is more favourable.
When maximum protection is required, the current density should be higher than the specified value under JIS Type 6, within the limit of the film being not peeled off.抄録全体を表示PDF形式でダウンロード (1334K)
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