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131. 发明专利

JPS60261617A SCALE REMOVING METHOD OF HOT-ROLLED SHEET STEEL 失效
公开(公告)号：JPS60261617A
公开(公告)日：1985-12-24
申请号：JP11797984
申请日：1984-06-08
申请人： HITACHI LTD , NIPPON STEEL CORP
发明人： ITOU MASAHIKO , MIDORIKAWA HEIHACHIROU , MINATO AKIRA , MITSUI HIROMITSU , SUZUKI TAKASHI , IIDA HIROSHI , SAITOU TAKAO , FURUI KIMIHARU
IPC分类号： B21B45/06
摘要： PURPOSE:To improve the productivity, and to reduce the cost of equipment by performing beinding to a hot-rolled sheet steel by giving a tension of a specified elongation percentage, breaking down a scale on the surface of the sheet steel, and thereafter, pickling it. CONSTITUTION:A hot-rolled sheet steel 25 is fed to a scale breaker through an entry bridle roll 15. In the scale breaker 16, the sheet steel 25 is given a tension by the bridle roll 15 and a delivery-side bridle roll 19, and also receives a bending action by a roll group. Accordingly, the sheet steel 25 is subjected to drawing, bending and elongation. Thereafter, its scale is removed partially by sprinkling cooling water by a brush grinding roll 17, and thereafter, the sheet steel 25 passes through the roll 19 and its scale is removed by a pickling tank. According to this method, the scale can be removed in a short time, therefore, a passing speed of a descaling line is improved. Accordingly, the production is improved, also the length of the pickling line is shortened, and the cost of equipment is reduced.

132. 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.

133. 发明专利

JPS6061112A METHOD AND DEVICE FOR HIGH-SPEED PICKLING OF STEEL STRIP 失效
公开(公告)号：JPS6061112A
公开(公告)日：1985-04-08
申请号：JP16920183
申请日：1983-09-16
申请人： HITACHI LTD
发明人： ITOU MASAHIKO , MIDORIKAWA HEIHACHIROU , MINATO AKIRA , KIMURA TOMOAKI
IPC分类号： B21B45/06 , B21B45/08 , C23G3/02
摘要： PURPOSE:To remove efficiently the scales of a hot rolled steel strip by forcibly flowing an acidic liquid on the surface of a continuously moving steel strip. CONSTITUTION:A tensile and bending strain is given to a steel strip 1 by a scale breaker 11 consisting of plural rolls to produce fine cracks in the scales of strip 1. The strip 1 enters a pickling device 3 and passes through wringer rolls 4, and then it passes on acidic-liquid passage guides 14 provided with acidic-liquid jetting ports 12 and acidic-liquid outflowing ports 16. With the aid of an acidic- liquid supplying pump 15, the liquid passes through a supplying pipe 16 and flows out of the plural ports 12, and then it flows through a gap between the strip 1 and the guids 14 at high speed to dissolved the scales. Successively the liquid flows out of the ports 13 to enter an acidic liquid storing tank 17, and is supplied and circulated again by the pump 15.

134. 发明专利

JPS6021368A CONTINUOUS HOT DIPPING METHOD OF BAND STEEL 失效
公开(公告)号：JPS6021368A
公开(公告)日：1985-02-02
申请号：JP12772483
申请日：1983-07-15
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： KATAYAMA KIICHIROU , ITOU TAKEHIKO , ITOU MASAHIKO , MIDORIKAWA HEIHACHIROU , MINATO AKIRA , KUBO MITSURU , YOSHIDA TOMIO
IPC分类号： C23C2/20 , C23C2/28 , C23C2/40
摘要： PURPOSE:To obtain the hot-dipped steel plate having excellent smoothness by gas-wiping the molten metal-deposited surface of the band steel coming out of a plating bath, and then reheating to allow the surface layer of the plated membrane to reflow. CONSTITUTION:The surface of a band steel 1 is cleaned in a reducing furnace 4 in a hot dipping line and dipped in a hot dipping bath 6, then drawn out into the atmosphere through a sink roll 7, and the plating amt. is regulated by a gas-wiping device 8. Said band steel is successively heated by a reheating burner 9, and the surface of the plated metal is allowed to reflow to smooth the plated surface by surface tension. The molten metal is solidified by natural cooling, and then forcibly cooled by blowing air with a cooler 10. In this way, the smoothness of the plated surface can be improved in the continuous Al dipping, etc.

135. 发明专利

JPS60351A MONITORING METHOD OF CORROSION 失效
公开(公告)号：JPS60351A
公开(公告)日：1985-01-05
申请号：JP10836183
申请日：1983-06-16
申请人： HITACHI LTD
发明人： HONDA TAKU , KASHIMURA EIJI , MINATO AKIRA , MIZUNIWA FUMIO , MAEKOYA CHIAKI
IPC分类号： G01N27/26 , G01N17/00
摘要： PURPOSE:To monitor corrosion simply by measuring the concentration of manganese ions from the corrosion information of a metallic material containing manganese. CONSTITUTION:A pipe 2 to be used from a primary cooling water system of a BWR nuclear power plant is made of a metallic material containing manganese. When the corrosive state of the pipe 2 is to be monitored, sampling pipes 3, 4 are connected to the inlet and outlet of the pipe 2 and the increment of the concentration of Mn ions in a flowing fluid 1 is measured. The quantity (m) of corrosion in the whole pipe 2 and the corrosion speed (dm/dt) are found out from equations ( I ), (II) on the basis of said measured value. In these equations, V is the flow rate of the fluid in the pipe, DELTAx is the increment of the concentration of Mn ions, t is the stay time of the fluid in the pipe, s is the contacting area of the pipe with the fluid, and rho is the concentration (Wt%) of Mn in the pipe material. The concentration of Mn ions is obtained by measuring the fluid collected by the sampling pipes 3, 4 on the basis of direct absorptiometry.

136. 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。

137. 发明专利

JPS59136487A Inhibition of stress corrosion cracking 失效
标题翻译：应力腐蚀开裂的抑制
公开(公告)号：JPS59136487A
公开(公告)日：1984-08-06
申请号：JP970483
申请日：1983-01-24
申请人： Hitachi Ltd
发明人： KIKUCHI EIJI , OONAKA NORIYUKI , MINATO AKIRA
IPC分类号： C23F11/18 , C23F15/00 , F22D11/00
摘要： PURPOSE: To inhibit stress corrosion cracking, by adjusting the concentration of hydrogen peroxide inside the piping or equipment of a Type-BWR reactor or the like in a manner such that said concentration is existent in a domain for suppressing stress corrosion cracking obtained by experimentation in its correlation with dissolved oxygen at said part.
CONSTITUTION: The experimental result to research the stress corrosion cracking action of sensitized SUS304, for instance, under the condition of hydrogen peroxide content of 0.1W100ppm and dissolved oxygen of 0.01W8ppm is shown in a both logarithmic graph. Stress corrosion cracking is not formed in a completely deaerated hydrogen peroxide solution of 0.5W100ppm, but stress corrosion cracking is formed under the condition that dissolved oxygen is coexistent in an amount equal to or more than that of hydrogen peroxide. That is, an oblique line part above the curve (a) represents a domain for suppressing stress corrosion cracking, while a lower part represents a domain for the formation of stress corrosion cracking. Consequently, by injecting hydrogen peroxide into piping or equipment, the concentration of hydrogen peroxide at said part is adjusted so as to exist in the domain for suppressing stress corrosion cracking above the curve (a) in correlation with dissolved oxygen.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了抑制应力腐蚀开裂，可以通过调节BWR型反应器等的配管或设备内的过氧化氢浓度，使浓度存在于抑制通过实验得到的应力腐蚀开裂的领域中其与所述部分的溶解氧的相关性。构成：研究了致敏SUS304的应力腐蚀开裂作用的实验结果，例如在过氧化氢含量为0.1〜100ppm，溶解氧为0.01-8ppm的条件下，以对数图表示。在0.5-100ppm的完全脱气的过氧化氢溶液中不会形成应力腐蚀开裂，但是在溶解氧共存量大于或等于过氧化氢的量的条件下形成应力腐蚀开裂。也就是说，曲线（a）上方的斜线部分表示用于抑制应力腐蚀开裂的畴，而下部表示形成应力腐蚀开裂的区域。因此，通过在管道或设备中注入过氧化氢，调节所述部分的过氧化氢浓度，以便存在于与溶解氧相关的曲线（a）以上的应力腐蚀开裂区域中。

138. 发明专利

JPS597864A Hydrogen remover for absorption type refrigerator 失效
标题翻译：用于吸收式制冷器的氢气去除器
公开(公告)号：JPS597864A
公开(公告)日：1984-01-17
申请号：JP11673082
申请日：1982-07-07
申请人： Hitachi Ltd
发明人： ITOU MASAHIKO , MIDORIKAWA HEIHACHIROU , MINATO AKIRA
IPC分类号： F25B43/04

139. 发明专利

JPS58185778A Prevention of corrosion of carbon steel 失效
标题翻译：防止碳钢腐蚀
公开(公告)号：JPS58185778A
公开(公告)日：1983-10-29
申请号：JP6742982
申请日：1982-04-23
申请人： Hitachi Ltd
发明人： KASHIMURA EIJI , HONDA TAKU , IZUMITANI MASAKIYO , MINATO AKIRA , OOSUMI KATSUMI
IPC分类号： C23F15/00
摘要： PURPOSE: To simply prevent the corrosion of carbon steel in a system where the steel is in contact with water contg. dissolved O
2 and having an ununiform flow rate distribution especially when the operation of a boiling water reactor plant is stopped, by restricting the specific electric conductivity of the water.
CONSTITUTION: In a system where carbon steel is in contact with water contg. dissolved O
2 and having an ununiform flow rate distribution, the specific electric conductivity of the water is kept at ≤0.2μS/cm by passing the water through a desalting column packed with granular cation and anion exchange resins. The corrosion speed of the part of the carbon steel which is in contact with the water having the ununiform flow rate distribution is reduced remarkably by keeping the specific electric conductivity of the water at ≤0.2μS/cm, so corrosion can be prevented effectively. In case of >0.2μS/cm specific electric conductivity, the diffusion speed of oxygen is reduced at a low flow rate part, the part acts as an anode, and corrosion proceeds.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：简单地防止在与水接触的系统中碳钢的腐蚀。溶解的O 2并且具有不均匀的流速分布，特别是当沸水反应器设备的操作停止时，通过限制水的比电导率。规定：在碳钢与水接触的系统中。溶解的O 2并且具有不均匀的流速分布，通过使水通过填充有颗粒阳离子和阴离子交换树脂的脱盐塔，水的比电导率保持在<= 0.2muS / cm。通过使水的比电导率保持在<= 0.2muS / cm，与具有不均匀流量分布的水接触的碳钢部分的腐蚀速度显着降低，因此可以有效地防止腐蚀。在超过0.2muS / cm的比电导率的情况下，在低流量部分，氧的扩散速度降低，该部分作为阳极，并进行腐蚀。

140. 发明专利

JPS58160287A STORAGE TANK FOR LIQUID 失效
公开(公告)号：JPS58160287A
公开(公告)日：1983-09-22
申请号：JP4267082
申请日：1982-03-19
申请人： HITACHI LTD
发明人： ITOU KAZUTOSHI , SUZUKI KATSUMI , SUZUKI MAMORU , MINATO AKIRA , UKAJI HIDEO
IPC分类号： B65D90/22 , C23F13/00 , G21D1/00

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