专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPS6267200A METHOD FOR REMOVING METALLIC OXIDE 失效
公开(公告)号：JPS6267200A
公开(公告)日：1987-03-26
申请号：JP20653485
申请日：1985-09-20
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOBAYASHI MASATO , KIKUCHI TSUTOMU , FURUYA YASUMASA , KATAOKA ICHIRO
IPC分类号： G21F9/28 , C25F1/06 , G21F9/00 , G21F9/30
摘要： PURPOSE:To dissolve the metallic oxide sticking to the surface of a stainless steel together with the surface layer and to thoroughly remove the metallic oxide by immersing the stainless steel on the surface of which the metallic oxide sticks into an electrolyte contg. a complexing agent and maintaining the same at adequate potential by cathodic polarization. CONSTITUTION:An object 2 to be cleaned from which the metallic oxide is to be removed is immersed into the electrolyte contg. the complexing agent such as EDTA in an electrolytic cell 1 and is subjected to the cathodic polarization by a DC power source 6 using a counter electrode 4 consisting of a stainless steel, etc. in a method for removing the metallic oxide sticking to the surface of the stainless steel. The potential of the cathodic polarization is so maintained as to exhibit an active dissolution behavior by changing the electrochemical behavior of the stainless steel from the passive state. The above-mentioned potential is adequately maintained at -0.65--0.75V by measuring the same with a potentiometer 5 based on a satd. calomel reference electrode 3. The above-mentioned metallic oxide and the surface of the stainless steel are thereby successively or simultaneously dissolved and the metallic oxide is thoroughly removed.

2. 发明专利

JPS58117500A METHOD OF DECONTAMINATING BY ELECTROLYSIS REDUCTION 失效
公开(公告)号：JPS58117500A
公开(公告)日：1983-07-13
申请号：JP18682
申请日：1982-01-06
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SUMIDA NOBUO , KATAOKA ICHIROU , ITOU HISAO , SAITOU TAKASHI , FURUYA YASUMASA
IPC分类号： G21F9/28 , G21F9/00

3. 发明专利

JPS59170300A Removing method of surface metallic oxide 失效
标题翻译：表面金属氧化物的去除方法
公开(公告)号：JPS59170300A
公开(公告)日：1984-09-26
申请号：JP4567583
申请日：1983-03-18
申请人： Hitachi Eng Co Ltd , Hitachi Ltd , Tokyo Genshiryoku Sangyo Kenkyusho
发明人： FURUYA YASUMASA , HIRA YASUO , HASEGAWA TAKASHI , MINATO AKIRA , SAWA TOSHIO , USUI HARUO , SUMIDA NOBUO
IPC分类号： G21F9/28 , C25F1/04 , G21F9/00
摘要： PURPOSE: To remove surface metallic oxide from a material to be washed without dissolving said material by bringing a washing liquid of which the reducing power is strengthened by an electrolytic reduction into contact with said material, and impressing a DC voltage on the material as cathode thereby causing cathode polarization.
CONSTITUTION: A material to be washed (piping) 1 from which the metallic oxide on the inside surface is to be removed is connected via a connecting pipe 4 to electrolytic cells 2, 3. An anode 7 and a cathode 8 are disposed via an ion exchange membrane 9 to the cell 2 and a washing liquid 6 contg. a complexing agent or reducing agent is circulated by a pump 5, then electric current is conducted to the anode 7 and the cathode 8 from a DC power source 10 to reduce electrolytically the liquid 6 and to increase the reducing power thereof. On the other hand, only the anode 11 is provided via an ion exchange member 12 in the cell 3 and electric current is conducted from a DC power source 13 to the material 1 as cathode so that the material 1 is brought into cathode polarization. The dissolution of the metallic oxide on the inside surface of the material 1 is thus accelerated by the approximately neutral washing liquid having weak corrosiveness.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了通过将电解还原作用使还原能力强化的洗涤液与所述材料接触而将所述材料中的表面金属氧化物除去而不溶解所述材料，并将作为阴极的直流电压施加在材料上引起阴极极化。构成：要从其中去除内表面上的金属氧化物的要洗涤的材料（管道）1经由连接管4连接到电解池2,3，阳极7和阴极8经由离子交换膜9到电池2和洗涤液6，络合剂或还原剂通过泵5循环，然后从直流电源10向阳极7和阴极8传导电流，以电解电解液体6并增加其还原能力。另一方面，仅通过电池单元3中的离子交换构件12设置阳极11，并且从直流电源13将电流作为阴极传导到材料1，使得材料1成为阴极极化。金属氧化物在材料1的内表面的溶解因此被具有弱腐蚀性的近似中性的洗涤液加速。

4. 发明专利

JPS58221289A Electrolytic cell 失效
标题翻译：电解槽
公开(公告)号：JPS58221289A
公开(公告)日：1983-12-22
申请号：JP10215282
申请日：1982-06-16
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： SUMIDA NOBUO , KATAOKA ICHIROU , ITOU HISAO , SAITOU TAKASHI , FURUYA YASUMASA
IPC分类号： C25F7/00 , C25B3/00 , C25B9/00 , C25F7/02
摘要： PURPOSE: To prevent the decrease in electrolytic efficiency by providing an intermediate liquid chamber between an anode chamber and a cathode chamber, and removing the oxidative material generated in the anode chamber during electrolysis in the intermediate liquid chamber.
CONSTITUTION: An intermediate liquid chamber 5 is provided between an anode chamber 2 and a cathode chamber 8 in an electrolytic cell used in the stage of dissolving away the oxide sticking to the surface of a metallic material by using the soln. reduced by electrolysis. A titanium plate plated with platinum is put in the chamber 2 and a porous glassy carbon electrode is put in the chamber 8. 0.1M oxalic acid is put in the chamber 2 and 0.002M ethylenediaminetetraacetic acid in the chamber 8 to control to 6.5pH. 0.1M citric acid is put in the chamber 5. The oxidative or reducing material diffused from the counter electrode chambers into the chamber 5 is removed by deaerating the chamber 5, and the fluctuation of the pH is suppressed by adding a buffer beforehand.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：通过在阳极室和阴极室之间设置中间液体室，并且在中间液体室中电解期间去除在阳极室中产生的氧化物质，以防止电解效率降低。构成：中间液体室5设置在阳极室2和阴极室8之间，该电解槽用于通过使用溶胶将粘附在金属材料表面上的氧化物溶解掉的阶段。通过电解减少。将镀有铂的钛板放入室2中，并将多孔玻璃碳电极放入室8中。将0.1M草酸放入室2中，并将0.002M乙二胺四乙酸放入室8中以控制为6.5pH。将0.1M柠檬酸放入室5中。通过对室5进行脱气来除去从反电极室扩散到室5中的氧化还原材料，并通过预先添加缓冲液来抑制pH的波动。

5. 发明专利

JPS5742397A Removal of oxide scale 失效
标题翻译：去除氧化皮的尺寸
公开(公告)号：JPS5742397A
公开(公告)日：1982-03-09
申请号：JP11600580
申请日：1980-08-25
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： SUMIDA HARUO , SAITOU MASAYUKI , ITOU HISAO , FURUYA YASUMASA
IPC分类号： C02F5/08 , C02F5/00 , C02F5/10 , C02F5/12 , C02F5/14 , C23F14/00 , C23G1/02
CPC分类号： C23G1/02
摘要： PURPOSE:To protect devices, pipings, etc. from damage in a power generating plant or the like, by lowering the concentration of an oxide scale-dissolving agent without lowering the dissolving speed of the oxide scale. CONSTITUTION:An object 1 from which oxide scale is to be separated, is dipped in a solution 2 containing an organic acid and a reducing agent in a dissolving vessel 3. The solution is circulated through a conduit 6 by a circulating pump 5, while light having a wave length in a range of from ultraviolet to near infrared is radiated from a xenon lamp 4. Thus, oxide scale is separated from the object 1. In the light source of the xenon lamp 4, a luminosity is large especially in a range of from near ultraviolet to ultraviolet where the light-absorbing intensity of the scale is large and the light absorption by the reducing agent itself is effected, so that the oxide scale is converted into an easily soluble excited state by absorption of the light energy. Consequently, a higher dissolving speed can be obtained even when the concentration of the dissolving agent and a temperature in the dissolving step are low, as compared with that in a conventional method.
摘要翻译：目的：通过降低氧化皮溶解剂的浓度，不降低氧化皮的溶解速度，保护设备，管道等免受发电厂等的损坏。构成：将要分离氧化皮的物体1浸入溶解容器3中的含有机酸和还原剂的溶液2.溶液通过循环泵5通过导管6循环，同时光具有从紫外线到近红外线的波长的波长从氙灯4照射。因此，氧化皮与物体1分离。在氙灯4的光源中，特别是在一定范围内由紫外线到紫外线，其中光斑的光吸收强度大，还原剂本身的光吸收受到影响，从而通过吸收光能将氧化皮转化为容易溶解的激发态。因此，与常规方法相比，即使溶解剂的浓度和溶解步骤中的温度低，也可以获得较高的溶解速度。

6. 发明专利

JPS62181834A MANUFACTURING METHOD FOR PIPE USED IN NUCLEAR POWER PLANT 失效
公开(公告)号：JPS62181834A
公开(公告)日：1987-08-10
申请号：JP2012986
申请日：1986-02-03
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： HONDA TAKU , KASHIMURA EIJI , OHASHI TAKEYA , FURUYA YASUMASA , OSUMI KATSUMI , AIZAWA MOTOHIRO
IPC分类号： B23P13/00 , C22C38/00 , F16L9/02 , F16L58/00 , G21D1/00
摘要： PURPOSE:To make it possible to restrain the accumulation of radio-active materials, by using SUS316 or SUS316L as a material for a pipe, by pickling and washing the material after solid solution heat treatment, and then by polishing the material so that the surface-roughness is less than 6S while no metal crystal grain boundary is exposed. CONSTITUTION:SUS316 or SUS316L is used as a material for a primary cooling water system pipe. The inner surface of the material is pickled with the use of fluorine nitrate solution after solid solution heat treatment, and is sufficiently washed with distilled water. Further, it is polished by, for example, a flapper polishing process so that it has a surface-roughness of less than 6S. Thus, since the SUS316 or SUS316L has a stable austenite structure so that no martensite induced by machining occurs due to mechanical polishing, metals crystal grin boundary is vanished due to the polishing, and the growth of an oxide film is restrained, while the outer surface thereof is coated uniformly with a film to enhance the corrosion-resistance, and further, the accumulation of cobalt may be minimized. Even though any other mechanical polishing method my be used to obtain the same result, thereby it is effective to reduce the exposure against the operator.

7. 发明专利

JPS59232279A REMOVING METHOD OF OXIDE ON METALLIC SURFACE 失效
公开(公告)号：JPS59232279A
公开(公告)日：1984-12-27
申请号：JP10544683
申请日：1983-06-13
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： FURUYA YASUMASA , HIRA YASUO , HASEGAWA TAKASHI , MINATO AKIRA , SHIYOUJI SABUROU , SUMIDA NOBUO
IPC分类号： C23G1/24 , C25F1/00 , C25F1/04
摘要： PURPOSE:To accelerate the dissolving and removing reaction of the oxide on a metallic surface in the stage of dissolving and removing the oxide with a neutral washing liquid having weak corrosiveness by incorporating hydrogen in the washing liquid and bringing the metal to be treated into electrical contact with the other specific metal. CONSTITUTION:Electric current is conducted between an anode 8 and a cathode 7 of an electrolytic cell 1 segmented by a cation exchange membrane 6 to an anode chamber 4 and a cathode chamber 5 from a DC power source 9 to electrolyze the neutral washing liquid circulated in the cell 1 to a dissolving cell 2 by a pump 3. H2 is generated by the cathode 7 and the washing liquid 10 contg. H2 is circulated to the inside of the cell 2. A metal 11 requiring dissolution and removal of the oxide on the surface is dipped in the cell 2 and at the same time a Pt, Pd, Ni, steel, stainless steel or carbon piece 12 is dipped therein and is electrically connected to the metall 11 by a lead wire 13. Electron is injected by H2 into the oxide film of the metal 11, by which only the oxide film is dissolved and removed at a high speed without corroding the base metal by the neutral washing soln. having weak corrosiveness.

8. 发明专利

JPS5785980A METHOD FOR REMOVAL OF OXIDE ON METALLIC SURFACE 失效
公开(公告)号：JPS5785980A
公开(公告)日：1982-05-28
申请号：JP16245880
申请日：1980-11-17
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SUMIDA HARUO , SAITOU MASAYUKI , ITOU HISAO , KOBAYASHI MASATO , FURUYA YASUMASA
IPC分类号： C23F13/00 , C23G1/00 , C23G1/36 , C25F1/04 , G21F9/28
摘要： PURPOSE:To remove surface oxide and suppress corrosion of base metallic material by immersing an object to be washed in liquid contg. a complexing agent, generating electrons having baser energy levels and injecting the electrons to the oxide of said object. CONSTITUTION:An object to be washed wherein iron oxide scraps 9A of Fe2O3 and Fe3O4 are formed on the base material surface of metallic iron 8 or the like is immersed in washing liquid 21 contg. a complexing agent. An electrodes 22 is immersed in the liquid 21 and the + side of a DC electric power source 23 is connected to the electrode 22 and the - side to the iron 8 via a controller 24. With such device, external energy is supplied to generate the electrons having energy levels on the side baser than the Fermi level of the oxide 9A on the outside part of the base material of the iron 8. The electrons are supplied to the inside of the layer 9A from the iron 8 side to reduce and dissolve the Fe of the layer 9A to Fe , which is accelerated by the complexing agent. By such method, both of dissolving of the oxide and corrosion prevention of the base metallic material are made possible.

9. 发明专利

JPS613094A DECONTAMINATION METHOD 失效
公开(公告)号：JPS613094A
公开(公告)日：1986-01-09
申请号：JP12374584
申请日：1984-06-18
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SAWA TOSHIO , FURUYA YASUMASA , SUMIDA SHIYUUSEI , ITOU HISAO
IPC分类号： G21F9/28 , G21F9/00 , G21F9/30

10. 发明专利

JPS58180284A Cell for regeneration of reducible solvent and chemical decontamination method using said cell 失效
标题翻译：用于再生可再生溶剂的细胞和使用固体细胞的化学去除方法
公开(公告)号：JPS58180284A
公开(公告)日：1983-10-21
申请号：JP6229882
申请日：1982-04-16
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： SUMIDA NOBUO , ITOU HISAO , SAITOU TAKASHI , KOBAYASHI MASATO , FURUYA YASUMASA
IPC分类号： C02F1/469 , C02F1/46 , G21C19/30 , G21C19/307 , G21F9/00 , G21F9/06 , G21F9/28
摘要： PURPOSE: To obtain a cell for regeneration of a reducible soln. having excellent regeneration efficiency, by disposing a cathode made of a high hydrogen voltage conductive sealing material so as to contact with the surface of diaphragm which segments an anode chamber and a cathode chamber.
CONSTITUTION: An electrochemical cell 3 is divided to an anode chamber 31 and a cathode chamber 32, and a diaphragm 33 adhered tightly with a porous cathode electrode 8 and an anode electrode 9 on a cation exchange membrance 7 is incorporated between the chambers 31 and 32. An electric power source 10 is connected to the electrodes 8, 9. A deareation tank 11 is provided to remove the dissolved oxygen in decontaminating liquid in addition to the above for the purpose of improving reduction efficiency. The liquid is bubbled in the tank 11 by using a gas cylinder 12. The liquid to be decontaminated is fed through a feed port 13 into the decontamination device. The eluate of the decontamination stage is removed with a filtering and desalting device 14.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：获得可还原溶胶再生细胞。通过将由高氢压导电密封材料构成的阴极配置成与分隔阳极室和阴极室的隔膜的表面接触而具有优异的再生效率。构成：电化学电池3被分成阳极室31和阴极室32，并且在室31和32之间并入有在多孔阴极8和阳极交换膜7上的阳极9紧密粘合的隔膜33 电源10连接到电极8,9上。为了提高还原效率，除了上述以外，还提供除气槽11除去去污液体中的溶解氧。通过使用气瓶12将液体鼓泡在罐11中。待净化的液体通过进料口13进入去污装置。去污阶段的洗脱液用过滤和脱盐装置14去除。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式