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1. 发明专利

JP2000273566A ALUMINUM ALLOY SACRIFICIAL ANODE FOR LOW TEMPERATURE SEAWATER 失效
公开(公告)号：JP2000273566A
公开(公告)日：2000-10-03
申请号：JP7744999
申请日：1999-03-23
申请人： NIPPON BOSHOKU KOGYO KK , NIPPON STEEL CORP
发明人： TAMURA YUICHI , IIDA TOMOHIRO , OHIRA TAKASHI , SASAKI NOBUHIRO
IPC分类号： C23F13/00 , C22C21/00
摘要： PROBLEM TO BE SOLVED: To prevent the generation of the making of the anode potential into the noble one, the reduction of effective electric quantity, the local pitting dissolution or the like and to obtain stable sacrificial performance by allowing the anode to have a compsn. contg. specified ratios of Zn, Mg, In, Si, B, Ga, and the balance Al with inevitable impurities. SOLUTION: This anode is composed of an aluminum alloy having a compsn. contg., by weight, 2.0 to 6.0% Zn, 1.0 to 5.0% Mg, 0.022 to 0.060% In, 0.05 to 0.30% Si, 0.001 to 0.500% B, 0.010 to 0.050% Ga, and the balance Al with inevitable impurities. More preferably, the contents of B and Ga are respectively limited to 0.022 to 0.200% B and 0.015 to 0.030% Ga. The sacrificial anode using this aluminum material has high effective electric quantity while a base anode potential is retained, exhibits general solubility and is not passivated in an environment in which the temp. of seawater drops near to 0 deg.C.

2. 发明专利

JP2000129474A METHOD FOR BUFFERING HYDROGEN ABSORBING EMBRITTLEMENT OF TITANIUM CLAD STEEL 失效
公开(公告)号：JP2000129474A
公开(公告)日：2000-05-09
申请号：JP30185198
申请日：1998-10-23
申请人： NIPPON KOKAN KK , NIPPON BOSHOKU KOGYO KK
发明人： SHIMIZU YOSHIAKI , FUJITA SAKAE , TANAKA YASUSHI , TAKANO TOSHIO , KARASAWA TAKESHI , KONO KENJI , HANAYAMA KAN
IPC分类号： E02B17/00 , B23K9/00 , C23F13/00 , E02D31/06
摘要： PROBLEM TO BE SOLVED: To suppress the excessive convertion of the electric potential of titanium clad steel into the baser one, to buffer the hydrogen absorbing embrittlement therein and to maintain its durability by providing titanium clad steel joined to a steel structure in which the submerged part is subjected to electric corrosion prevention with a metallic material having a natural electric potential baser than that of the steel and joining it with the steel. SOLUTION: The submerged part 2 in seawater of the steel pipe pile 1 of a landing bridge 7 is, e.g. fitted with a voltaic anode 3, which is subjected to electric corrosion prevention. Moreover, titanium clad steel 5 having high corrosion resistance is coiled directly below a droplet zone and a tide zone 4 severe in corrosive environments in the steel pipe pile 1, and its corrosion resistance is moreover increased. In this steel structure, from the tide seawater face of the titanium clad steel 5 to below about 1 m, a metallic material 8 with a planar, helical or netty shape or the like of copper, a copper alloy, stainless steel, cupro, a nickel base alloy or the like having a natural electric potential baser than that of the steel is coiled, and, moreover, this metallic material 8 is welded and joined to the steel pipe pile 1. In this way, protective current is flowed on the metallic material, and it is made hard to flow on the titanium clad steel to prevent hydrogen absorption.

3. 发明专利

JP2000129473A CORROSION INHIBITION METHOD FOR INSIDE FACE OF METALLIC TUBE 失效
公开(公告)号：JP2000129473A
公开(公告)日：2000-05-09
申请号：JP29820198
申请日：1998-10-20
申请人： NIPPON BOSHOKU KOGYO KK
发明人： IKEDA KENICHI
IPC分类号： C23F13/00
摘要： PROBLEM TO BE SOLVED: To maintain rust prevention and corrosion inhibition at the inside face of a metallic tube which can not be viewed from the outside and difficult in access for a long time without requiring any treatment, to the inside of a metallic tube, by filling metallic fine pieces having a standard electrode potential baser than that of the material of this metallic tube. SOLUTION: At the inside of a pipe column 1 made of steel raised to foundation concrete 2, a pipe-shaped insert 3 having a size smaller than the inside diameter thereof is arranged. This insert 3 is the one made of a resin, and in which the top part is provided with a semi-spherical cover 3a, and the outer circumference of the bottom part is provided with a collar 3b. The gaps between the inner wall of the pipe 1 and the outside face of the insert 3 are filled with fine metallic grains 4. As this metallic grains 4, the powder of metals such as zinc, aluminum, magnesium or the like or alloys thereof having a standard electrode potential baser than that of the material of the pipe 1 is used. In this way, the fine metallic grains 4 are made an anode to prevent corrosion in the cathode at the inside face of the pipe column 1, and, moreover, it is subjected to anodic dissolution to form a hydroxide protective film, by which rust generation and corrosion generation at the inside face of the pipe column 1 are continuously prevented.

4. 发明专利

JP2000002001A BREAKAGE METHOD 失效
公开(公告)号：JP2000002001A
公开(公告)日：2000-01-07
申请号：JP16979798
申请日：1998-06-17
申请人： NIPPON BOSHOKU KOGYO KK
发明人： YAMAMOTO SATORU , ISHIKAWA MITSUO
IPC分类号： E04G23/08 , E21C37/00
摘要： PROBLEM TO BE SOLVED: To provide a breakage method, in which operation is simplified and is safety and breaking force and speed (a demolition time) are controlled easily and which is also applied to partial breakage and can also be applied to the breakage of a concrete structure, a rock, etc. SOLUTION: One or more holes are bored to an article to be broken 1, each hole is filled with ion conductive back-fills 7, a plurality of anodizing metallic bodies 3, 4 and/or metallic bodies 3, 4 generating alkali corrosion are inserted into the back-fills 7 so as to not to be mutually brought into contact, these metallic bodies 3, 4 are divided into two groups, the metallic bodies 3, 4 of one group are connected to a positive pole for a DC power device 9 and the metallic bodies 3, 4 of the other group to a negative pole, and a current is conducted among the metallic bodies 3, 4 of both groups and the article to be broken 1 is broken by corroding and expanding the metallic bodies 3, 4 joined with the positive pole for at least the DC power device 9.

5. 发明专利

JP2977861B2 失效
公开(公告)号：JP2977861B2
公开(公告)日：1999-11-15
申请号：JP13202390
申请日：1990-05-22
申请人： NIPPON BOSHOKU KOGYO KK
发明人： NOGUCHI ISAMU , SASAKI MASATO , MASUDA HITOSHI
IPC分类号： C25B1/34

6. 发明专利

JP2912006B2 失效
公开(公告)号：JP2912006B2
公开(公告)日：1999-06-28
申请号：JP30787790
申请日：1990-11-14
申请人： NIPPON BOSHOKU KOGYO KK
发明人： ISHIKAWA MITSUO , YAMAMOTO SATORU
IPC分类号： G01N27/30

7. 发明专利

JPH11158664A ELECTROLYTIC PROTECTION METHOD BY POTENTIOSTATIC EXTERNAL POWER SOURCE SYSTEM 失效
公开(公告)号：JPH11158664A
公开(公告)日：1999-06-15
申请号：JP33002397
申请日：1997-12-01
申请人： NIPPON BOSHOKU KOGYO KK
发明人： ABE MITSUYUKI , MATSUMURA KOICHIRO , SUDO HIKARI , ONISHI KENJI
IPC分类号： C23F13/00 , C23F13/20
摘要： PROBLEM TO BE SOLVED: To provide an electrolytic protection method by a potentiostatic external power source system which provides corrosion prevention by installing plural units of potentiostatic electrolytic protection devices to one relatively large-scale body to be protected. SOLUTION: In the electrolytic protection method by the potentiostatic external power source system which provides corrosion prevention by installing plural units of the potentiostatic electrolytic protection devices 2, 3, 4 comprising the potentiostatic DC power source devices 21, 31, 41, electrodes 22, 32, 42 for energization and reference electrodes 23, 33, 43; the set potential of the potentiostatic electrolytic protection devices 31, 41 covering the other prescribed corrosion prevention range is shifted to a base or noble potential within the range of the corrosion prevention management potential when the potential of the prescribed corrosion prevention range covered by part of the potentiostatic electrolytic protection device 21 deviates the corrosion prevention management potential, by which the potential of the corrosion prevention range covered by part of the potentiostatic electrolytic protection device 2 deviating from the corrosion prevention management potential is reset to the corrosion prevention management potential.

8. 发明专利

JP2905834B2 失效
公开(公告)号：JP2905834B2
公开(公告)日：1999-06-14
申请号：JP32669090
申请日：1990-11-28
申请人： TOKYO GASU KK , NIPPON BOSHOKU KOGYO KK
发明人： MORI KUNIHIRO , OKADA MASUMI , NAGASHIMA SHINGO , KANDA YOSHIAKI , YAGUCHI TERUMI , OOSAKAI AKIRA
IPC分类号： G01N27/20

9. 发明专利

JP2776385B2 失效
公开(公告)号：JP2776385B2
公开(公告)日：1998-07-16
申请号：JP4149388
申请日：1988-02-24
申请人： NIPPON BOSHOKU KOGYO KK
发明人： NAKAMURA NORIMICHI , CHIBA TOMOYOSHI , ICHINOSE HIROMI
IPC分类号： C23F13/00

10. 发明专利

JPH10183387A CORROSION PREVENTING DEVICE FOR ALUMINUM ALLOY HULL 失效
公开(公告)号：JPH10183387A
公开(公告)日：1998-07-14
申请号：JP35573696
申请日：1996-12-24
申请人： NIPPON BOSHOKU KOGYO KK
发明人： NOGUCHI ISAMU
IPC分类号： C23F13/00
摘要： PROBLEM TO BE SOLVED: To use a carbon electrode as a corrosion preventing means for an aluminum alloy hull without using a voltaic anode to be consumed. SOLUTION: The surface of an insulator 3 is integrally provided with a carbon electrode 4, a dry cell 5 is housed in the insulator 4 in a watertight way and also in freely attachably and detachably, the plus side of this dry cell 5 is made electrically conductible with the carbon electrode, and furthermore, in the case the insulator 3 is fixed to a required part to be contacted with seawater in an aluminum alloy hull, the minus side of the dry cell 5 is made electrically conductible with the aluminum alloy hull.

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