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1. 发明专利

JP2011075370A Analyzer and method of evaluating flange shape 有权
标题翻译：分析仪和法兰形状评估方法
公开(公告)号：JP2011075370A
公开(公告)日：2011-04-14
申请号：JP2009226085
申请日：2009-09-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： FUKUYAMA TETSUYA , OHASHI TAKEYA , HIRA YASUO
IPC分类号： G01N17/00 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To evaluate a flange shape as to gap corrosion by quantifying a corrosion phenomenon arising within a gap in a flange of a product by a finite element method.
SOLUTION: In this analyzer 100, first, a model of a gap shape of a flange is generated by a model generator 111. Nextly, when initial conditions and an equation necessary for analysis are thereinto input, the equation is solved by an analysis processor 112 to find electric potential distribution on the gap shape and concentration distribution of ferric ions with iron that forms the flange liquated thereinto. Thereafter, an optimum flange shape reducing the quantity of corrosion is determined by a shape evaluator 113 while referring to the found potential distribution and concentration distribution.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：通过有限元法量化产品的凸缘内的间隙中产生的腐蚀现象来评估间隙腐蚀的凸缘形状。解决方案：在该分析器100中，首先，由模型发生器111产生凸缘的间隙形状的模型。接下来，当在其中输入初始条件和分析所需的等式时，通过分析处理器112，以发现形成法兰液化的铁的铁离子的间隙形状和浓度分布的电位分布。此后，参照发现的电位分布和浓度分布，通过形状计算器113确定减少腐蚀量的最佳凸缘形状。版权所有（C）2011，JPO＆INPIT

2. 发明专利

JPS58167782A PREVENTION OF STRESS CORROSION CRACK OF STEEL MATERIAL 失效
公开(公告)号：JPS58167782A
公开(公告)日：1983-10-04
申请号：JP4905882
申请日：1982-03-29
申请人： HITACHI LTD
发明人： HIRA YASUO , HASEGAWA TAKASHI , FURUYA YASUMASA , MINATO AKIRA , SUMIDA NOBUO
IPC分类号： C23F11/14
摘要： PURPOSE:To prevent the stress corrosion cracking of stainless steel machinery, in an apparatus bringing high temp. and high pressure water into contact with the stainless steel machinery, by adding ethylenediamine tetraacetic acid or a salt thereof to high temp. and high pressure water as an inhibitor. CONSTITUTION:In order to prevent the generation of the stress corrosion cracking of stainless steel machinery in the arranged pipe or the boiler of a steam power plant due to high temp. and high pressure water contacted therewith, ethylenediamine tetraacetic acid or an ammonium salt thereof or a salt with org. amine is added to high temp. and high pressure water as an inhibitor. The addition concn. thereof is 1ppm or more when the temp. of high temp. and high pressure water is 150 deg.C or less while is within a range of 1-1,000ppm when 150 deg.C or more. By this method, the sensitivity of stainless steel to stress corrosion cracking is lowered and the generation ratio of stress corrosion cracking is reduced.

3. 发明专利

JPH10290920A HIGHLY CORROSION-RESISTING WASTE GAS DECOMPOSITION DEVICE AND SEMICONDUCTOR MANUFACTURING DEVICE 失效
公开(公告)号：JPH10290920A
公开(公告)日：1998-11-04
申请号：JP10421897
申请日：1997-04-22
申请人： HITACHI LTD
发明人： HIRA YASUO , HONDA TAKU , MASUYAMA SHIGEJI , IRIE KAZUYOSHI
IPC分类号： B01D53/58 , C23C16/44 , C23C16/455 , H01L21/02 , H01L21/205
摘要： PROBLEM TO BE SOLVED: To reduce corrosiveness of acidic waste gas by mixing and neutralizing the acidic waste gas from a semiconductor manufacturing device and basic gas contained in CVD gas or the like. SOLUTION: There is equipment whose waste gas contains SiH4 , WF6 , H2 , NH3 , ClF3 , CF2 , CL2 , and the like. The figure shows the constitution of this equipment. Since the corrosion of a scrubber 7 and a duct 5 of this equipment is large, the following measures are taken. First, a neutralizing column by ion exchange fiber is installed immediately behind the scrubber 7, and the structure of a discharge duct 4 is made seamless structure, and furthermore, material of the discharge duct 4 is made monel of good hydrofluoric acid resistance. By these measures to prevent corrosion, corrosion of a discharge system is notably reduced to enable securing the reliability.

4. 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.

5. 发明专利

JP2009001855A Member with anodic oxide film formed on surface and anodization method 审中-公开
标题翻译：具有阳极氧化膜的成员在表面和阳极化方法上形成
公开(公告)号：JP2009001855A
公开(公告)日：2009-01-08
申请号：JP2007163285
申请日：2007-06-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRA YASUO , FUJII KAZUMI
IPC分类号： C25D11/04 , C25D11/06 , C25D11/14
摘要： PROBLEM TO BE SOLVED: To provide a member on which an anodic oxide film having excellent corrosion resistance and conductivity is formed.
SOLUTION: The anodized film formed on the surface of an aluminum material and having 0.5-20.00 μm thickness has small surface resistance and contains metal ions such as Zn, Mn, Mo except the base material. Anodization of the aluminum material is performed by controlling so that a bath temperature is 5-10°C, the concentration in a bath of sulfuric acid, oxalic acid or the like is 10-30 wt.% and current density in the bath is 0.1-0.6 A/dm
2 and by adding, at need, Zn, Mn, Mo and other metals.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种其上形成具有优异的耐腐蚀性和导电性的阳极氧化膜的部件。解决方案：铝基材表面上形成的具有0.5-20.00μm厚度的阳极氧化膜具有小的表面电阻，除了基材之外还含有诸如Zn，Mn，Mo之类的金属离子。通过控制使浴温度为5-10℃，硫酸，草酸等的浓度为10〜30重量％，浴中的电流密度为0.1，进行铝材的阳极氧化 -0.6A / dm 2＆lt; SP＆gt;并且在需要时加入Zn，Mn，Mo和其它金属。版权所有（C）2009，JPO＆INPIT

6. 发明专利

JPH10290922A FLON DECOMPOSITION DEVICE 失效
公开(公告)号：JPH10290922A
公开(公告)日：1998-11-04
申请号：JP10425897
申请日：1997-04-22
申请人： HITACHI LTD
发明人： HIRA YASUO , HONDA TAKU , TAMADA SHIN , IRIE KAZUYOSHI
IPC分类号： A62D3/00 , B01D53/86
摘要： PROBLEM TO BE SOLVED: To provide a flon decomposition device having high corrosion resistance. SOLUTION: In a flon decomposition device provided with a radiator 7 for cooling a waste liquid, corrosion property is decreased by neutralizing an exhaust gas from the device. The structures of an exhaust gas discharge part and a piping contacting with the waste liquid are made into a straight pipe structure without a bent part and also are made into a structure where a joint and a flange part are eliminated without an opening. Or the structural material is made of a material whose the corrosion speed is less than 20 mpy in hydrochloric acid or hydrofluoric acid.

7. 发明专利

JPH10252415A KEEPING METHOD FOR TURBINE EQUIPMENT AT ITS STOPPAGE AND TURBINE EQUIPMENT IN THERMAL POWER PLANT 失效
公开(公告)号：JPH10252415A
公开(公告)日：1998-09-22
申请号：JP5274997
申请日：1997-03-07
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： HIRA YASUO , SHIMIZU NOBUO , TSUJI YOSHIJI
IPC分类号： F01D25/00 , F01D21/00
摘要： PROBLEM TO BE SOLVED: To prevent the corrosion of a clearance and a hole when turbine equipment in a thermal power plant is stopped and prolong the service life of the turbine equipment by making the inside of a turbine casing non-oxidizing atmosphere, and increasing pressure of the atmosphere when compared with atmospheric pressure when the turbine equipment in the thermal power plant is stopped for storage. SOLUTION: When a thermal power plant is stopped at night when output demand of power is small, output is gradually reduced, and a steam temperature is gradually reduced. When a valve between a high pressure turbine 2 and a boiler and a valve between a low pressure turbine 14 and a condenser are closed after the plant is stopped, a turbine part only is isolated and is isolated from the other system. Next, when pressure in the turbine drops below outside air pressure and a valve of a nitrogen pouring line 17 is opened, pressure of inert gas is kept to 2 to 3 atmospheric pressure at first, and when a temperature reaches the temperature at which steam pressure in the turbine drops sufficiently when compared with atmospheric pressure, pressure of nitrogen is reduced and is kept at pressure which is higher than outside pressure by several %, to make the inside of the turbine a pressurizing condition for outside air.

8. 发明专利

JPH08220087A CORROSION ESTIMATING METHOD FOR PLANT STRUCTURAL MATERIAL AND CORROSION DIAGNOSTIC SYSTEM 失效
公开(公告)号：JPH08220087A
公开(公告)日：1996-08-30
申请号：JP2690795
申请日：1995-02-15
申请人： HITACHI LTD
发明人： HONDA TAKU , HIRA YASUO , ARAI YUKO , YOKOSUKA TSUNENOBU , SUKEGAWA MASAYUKI
IPC分类号： G01N33/20 , G01N17/00 , G21C17/003 , G21D1/00
摘要： PURPOSE: To estimate the corrosion of the structural material which is brought into contact with acid solution in a plant for treating the solution or particularly a spent nuclear fuel reprocessing facility. CONSTITUTION: The product of the corroding velocity of an atmospheric pressure boiling state, the corrosion acceleration rate of dissolved chemical seed, a welding process influence correction value, a temperature correction value and an operating mode correction value is estimated as the corrosion velocity in a plant to be diagnosed. A diagnostic system estimates the corroding velocity and the corrosion state by using material information 1, operating information 3 and medium information 5, and outputs the estimated result.

9. 发明专利

JPS60171444A METHOD FOR MONITORING REMOVAL OF OXIDE FILM ON SURFACE OF METAL 失效
公开(公告)号：JPS60171444A
公开(公告)日：1985-09-04
申请号：JP2711384
申请日：1984-02-17
申请人： HITACHI LTD
发明人： FURUYA YASUMASA , HIRA YASUO , MINATO AKIRA , HASEGAWA TAKASHI , ITOU HISAO
IPC分类号： G01N27/26 , G01N17/02 , G01N27/416
摘要： PURPOSE:To make it possible to judge the completion of washing, in removing a film comprising ferrous metal oxide by a chemical solution, by monitoring a washing state while a cathode current is flowed between the opposed electrode and an article to be washed immersed in the chemical solution. CONSTITUTION:The potential of stainless steel having an oxide film is higher than that of the base metal thereof in cathode current density of 200muA/cm or less and lowered as the washing of the oxide film by a chemical solution advances. In performing chemical washing in such a state that a piping like article 3 to be washed is filled with the chemical solution 4, a DC power source 6 and an ammeter 7 are arranged between an opposed electrode 5 and the article 3 to be washed to flow a minute DC current. Next, a salt bridge 8 is inserted into the article 3 to be washed so as to reach a measuring position and the approach to the potential of the base metal preliminarily measured at the same cathode current density by using a standard electrode 9 as a reference electrode is monitored continuously or intermittently by a potentiometer 10. By this method, the corrosion of a material by over-washing can be prevented.

10. 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。

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