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1. 发明专利

JP2002200699A COATED STEEL MATERIAL 审中-公开
公开(公告)号：JP2002200699A
公开(公告)日：2002-07-16
申请号：JP2001307202
申请日：2001-10-03
申请人： NIPPON STEEL CORP
发明人： YAMANAKA SHINTARO , YAMAMOTO MASAHIRO , ENDO HIDEKAZU , MIYASAKA AKIHIRO
IPC分类号： B05D1/36 , B05D7/24 , B32B15/08 , C09D5/00 , C09D7/12 , C09D201/00
摘要： PROBLEM TO BE SOLVED: To provide a coated steel material excellent in resistance to cathodic release and resistance to shock especially in high-temperature atmosphere. SOLUTION: In the coated steel material, a chemically treated layer is provided on or above the surface of a steel material while a primer layer, a modified polyolefin layer, a polyolefin layer are laminated sequentially on the surface of the steel material. The primer layer is constituted of a thermoplastic resin, a vanadium compound or an inorganic oxidized acidic salt having alkaline neutralizing function.

2. 发明专利

JP2001123259A HOT-DIP Al-MG-Si ALLOY COATED STEEL WIRE EXCELLENT IN CORROSION RESISTANCE, AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2001123259A
公开(公告)日：2001-05-08
申请号：JP30008299
申请日：1999-10-21
申请人： NIPPON STEEL CORP
发明人： KUROSAKI MASAO , ENDO HIDEKAZU , WAKE RYOSUKE , MAKI JUN , NIIGASHIRA HIDETOSHI
IPC分类号： C23C2/12 , C23C2/02 , C23C2/26 , C23C2/38
摘要： PROBLEM TO BE SOLVED: To provide a plated steel wire having excellent corrosion resistance under saltwater environment and freshwater environment and its manufacturing method. SOLUTION: In the hot-dip Al-Mg-Si alloy coated steel wire, a hot-dip Al-Mg- Si alloy coating layer having a composition consisting of, by mass, 3-9% Mg, 2-10% Si and the balance Al with inevitable impurities is formed on the surface of a steel wire. Coating weight is (10 to 400) g/m2 expressed in terms of Al, and Mg2Si is contained in the plating layer. Further, an Al-Si-Fe alloy layer of =80% degree of curing. In the plating method, pretreatment is performed, at the above alloy plating, by using an aqueous flux where KCl and NaCl are contained as main components and at least one kind of fluoride among Na3AlF6, AlF3, NaF and KF is added.

3. 发明专利

JPH09263926A HOT DIP ZINC-MAGNESIUM-ALUM. ALLOY PLATED STEEL WIRE AND PLATING METHOD THEREFORE 失效
公开(公告)号：JPH09263926A
公开(公告)日：1997-10-07
申请号：JP7345496
申请日：1996-03-28
申请人： NIPPON STEEL CORP
发明人： ENDO HIDEKAZU , ITO YOICHI , NISHIMURA KAZUMI , MORIMOTO YASUHIDE
IPC分类号： C23C2/38
摘要： PROBLEM TO BE SOLVED: To enable the prolongation of the storage period of strands at the coast and to enable the construction of cables with soundness even if being a suspension bridge remarkably huger than the existing suspension bridge by imparting excellent corrosion resistance to a steel wire for a suspension bridge cable. SOLUTION: This hot dip Zn-Mg-Al alloy plated steel wire is the one in which the surface of a steel wire is applied with an Ni plating layer (by 0.2 to 2g/m by the coating weight of Ni), and the surface is applied with a hot dip Zn-Mg-Al alloy plating layer contg. 0.1 to 1wt.% Al (by 100 to 400g/m by the coating weight of plating). For applying the above hot dip Zn-Mg-Al alloy plating to the steel wire, the surface of the steel wire is applied with Ni plating by 0.2 to 2g/m Ni coating weight by electroless treatment, and after that, the steel wire is dipped into a galvanizing bath contg. 0.05 to 3wt.% Mg and 0.1 to 1wt.% Al and heated at 380 to 500 deg.C bath temp. and is thereby adhered with the Zn-Mg-Al alloy plating by 100 to 400g/m .

4. 发明专利

JPH08276535A POLYOLEFIN COATED STEEL PRODUCTS OF EXCELLENT ENVIRONMENTAL STRESS CRACK FAILURE RESISTANCE 失效
公开(公告)号：JPH08276535A
公开(公告)日：1996-10-22
申请号：JP10711795
申请日：1995-04-07
申请人： NIPPON STEEL CORP
发明人： ENDO HIDEKAZU , YUASA KENSHO
IPC分类号： B32B15/085 , B32B15/08 , C08L23/12 , C08L101/00
摘要： PURPOSE: To obtain a resin coated steel product wherein hardness equal in performance to that of ethylene-propylene block copolymer and toughness of polyethylene are jointly provided, and excellent environmental stress crack failure resistance is provided by a method wherein a polyolefin resin laminated on a surface of a steel product via an adhesive is specified. CONSTITUTION: This polyolefin coated steel product of excellent environmental stress crack failure resistance is obtained by laminating polyolefin resin 5 on a surface of the steel product 1 via an adhesive 4. The polyolefin resin used herein is syndiotactic polypropylene polymerized by using a single site catalyst, its racemic pendant fractional rate is at least 80%, a ratio of weight average molecular weight to number average molecular weight is at most 3, and a melt flow rate at 230 deg.C is 0.5 G/10min-55g/10min. The racemic pendant fractional rate herein is a numerical index indicating a syndiotactic degree of the polypropylene molecule.

5. 发明专利

JPH04113823A MANUFACTURE OF POLYOLEFIN-COVERED METAL PIPE EXCELLENT IN ADHESION 失效
公开(公告)号：JPH04113823A
公开(公告)日：1992-04-15
申请号：JP23381990
申请日：1990-09-04
申请人： NIPPON STEEL CORP
发明人： ENDO HIDEKAZU , ISHIDA MASAMI , YOSHIDA HIROSHI
IPC分类号： B05D1/12 , B05D7/24 , B29C47/02 , B29K23/00 , B32B1/08 , B32B15/08 , B32B15/085
摘要： PURPOSE:To contrive to improve and stabilize adhesion by a method wherein adherent polyolefin layer, which is produced by dusting powdered adherent polyolefin, is fixed by pressure with a cylindrical elastic body having proper hardness and then melted completely and finally covered by polyolefin-based resin. CONSTITUTION:Onto metal pipe 1, which is heated in advance and has molten beads, amine-curing type epoxy-based primer 3 is applied with a spraygun 2. After the hardening of the primer, powdered adherent polyolefin 5 consisting of polyethylene modified by anhydride is uniformly applied with an electrostatic powder spraygun 4 on the primer. The coating layer of the adherent polyolefin 5 is fixed by pressure with a rubber roll 8 as a cylindrical elastic body and, after that, melted. Finally, the melted layer is covered through extrusion process by polyolefin-based resin 7, which is extruded from a T-die 6.

6. 发明专利

JPH0471842A COMPOSITE REINFORCED PLASTIC COVERED STEEL MATERIAL 失效
公开(公告)号：JPH0471842A
公开(公告)日：1992-03-06
申请号：JP18446690
申请日：1990-07-12
申请人： NIPPON STEEL CORP
发明人： SASAKI TOSHIYUKI , YOSHIDA HIROSHI , ENDO HIDEKAZU
IPC分类号： B32B5/16 , B32B7/02 , B32B7/04 , B32B15/08 , B32B15/085 , B32B17/04
摘要： PURPOSE:To provide a sufficiently high adhesive force between an anticorrosive covered layer and a protective layer by spraying a flock-planting material of organic or inorganic fiber on the anticorrosive covered layer before it hardens, pressing the flock-planting material against the anticorrosive covered layer by a roll to plant flock and coating a reinforced plastic resin thereon. CONSTITUTION:A flock-planting material 4 of organic or inorganic fiber is sprayed on an anticorrosive covered layer 3 before it hardens and immediately thereafter is pressed against the anticorrosive covered layer 3 by a roll to plant the flock. After the anticorrosive covered layer hardens completely, it is covered with a reinforced plastic resin. When the anticorrosive covered layer 3 is made of a polyolefin, the covering material is generally laid at a high temperature, permitted to harden as the temperatures goes down and it is essential that the block-plating material should be sprayed at a time when the polyolefin has a surface temperature of 80 deg.C or higher immediately after the covering is provided, The organic or inorganic fiber preferably ha a diameter of 2 to 25 mu m and a length of 2 to 10mm. The flock-planting material is sprayed preferably in an amount of 3 to 50g/m .

7. 发明专利

JP2004059968A Highly corrosion resistant hot-dipped steel wire superior in workability 审中-公开
公开(公告)号：JP2004059968A
公开(公告)日：2004-02-26
申请号：JP2002217655
申请日：2002-07-26
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YAMAMOTO MASAHIRO , YAMANAKA SHINTARO , ENDO HIDEKAZU
IPC分类号： C23C2/06 , C23C2/12 , C23C2/28 , C23C2/38
摘要： PROBLEM TO BE SOLVED: To provide a highly corrosion resistant plated steel wire which can be used in a beach environment and is superior in workability.
SOLUTION: The steel wire has a hot-dipped layer thereon which comprises Al of 20 mass% or more but less than 80 mass%, Mg of 0.05 mass% or more but less than 5.0 mass%, Si of 1-12 mass% with respect to the Al content, and the balance Zn with unavoidable impurities. The above hot-dipped layer has a flat and uniform alloy layer contacting with an iron matrix as a lower layer thereof, which contains Al and Fe of 60 mass% or more in total, has thicknesses of 1-50 μm, makes a difference between a maximum value and a minimum value of the thicknesses so as not to exeed the average thickness, and further has 50μm or less of the maximum value of unevenness in a boundary between the iron matrix and the alloy layer per 200 μm by length of the surface of the steel wire.
COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2002206156A PLATED STEEL PRODUCT FOR STEEL TOWER, ITS MANUFACTURING METHOD, AND FLUX FOR USE IN THE MANUFACTURING METHOD 失效
公开(公告)号：JP2002206156A
公开(公告)日：2002-07-26
申请号：JP2001074986
申请日：2001-03-15
申请人： NIPPON STEEL CORP
发明人： ENDO HIDEKAZU , YAMAMOTO MASAHIRO , MIYASAKA AKIHIRO
IPC分类号： C23C2/06 , C23C2/30 , C23C2/36 , C23C2/38
摘要： PROBLEM TO BE SOLVED: To provide a plated steel product for steel tower which has excellent corrosion resistance under a wide range of corrosive environment ranging from a high-chlorine-concentration environment to a low-chlorine-concentration environment and a steel product which is formed into a structure using the plated steel product and further to provide a method for manufacturing the steel product structure using a one-step dry-type hot-dip coating method. SOLUTION: The plated steel product for steel tower has a plating layer composed essentially of Zn, Mg and Al on the surface of the steel, and further, a Zn-Mg intermetallic compound (MgZn2, Mg2Zn11) phase exists in the plating layer and this Zn-Mg intermetallic compound phase occupies =0.05 μm distance between adjacent phases. Moreover, an Al-Zn alloy phase forms a dendritic or island-like phase and occupies

9. 发明专利

JP2000160315A HOT DIP GALVANNEALED STEEL 失效
公开(公告)号：JP2000160315A
公开(公告)日：2000-06-13
申请号：JP33714498
申请日：1998-11-27
申请人： NIPPON STEEL CORP
发明人： MORIMOTO YASUHIDE , KATO KENJI , NOMURA HIROMASA , ENDO HIDEKAZU
IPC分类号： C23C2/06 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To improve the corrosion resistance of steel at severe places in which sea salt particles fly without unnecessarily increasing the cost by providing the surface of a steel sheet with a hot dip galvannealing layer having a specified compsn. composed of Mg, Al and Zn and good in wettability. SOLUTION: This is hot dip galvannealed steel having a galvannealing layer contg., by weight, 0.05 to 2% Mg, 0.0005 to 0.1% Al, and the balance Zn, in which plating is possible by equipment equal to that for ordinary hot dip galvanizing. Mg as an alloy component improves the corrosion resistance of the hot dip galvanizing. Moreover, Al secures its wettability to suppress the defects in the plating, and moreover, improves the corrosion resistance of the plating. Furthermore, the coating weight is desirably controlled to about 100 to 400 g/m2. This hot dip galvannealed steel is obtd., e.g. by subjecting steel to alkali cleaning and pickling treatment, thereafter executing pretreatment by a flux method or the like and dipping it into a hot dip plating bath having a prescribed componential compsn. and heated at about 380 to 480 deg.C for about 10 to 600 sec.

10. 发明专利

JPH08300559A STEEL TUBE WITH ORGANIC HEAVY-DUTY COATING HAVING METAL WINDING PART 失效
公开(公告)号：JPH08300559A
公开(公告)日：1996-11-19
申请号：JP13751795
申请日：1995-05-12
申请人： NIPPON STEEL CORP
发明人： YUASA KENSHO , ENDO HIDEKAZU , ITO YOICHI
IPC分类号： E02D5/60 , B21D49/00 , B32B1/08 , B32B15/08 , B32B15/18
摘要： PURPOSE: To prevent the formation of flaw to the coating and keep the corrosion resistive performance even when collision, friction or the like is generated in handling of steel tube with an organic heavy-duty coating at the time of transportation, storage and execution of works. CONSTITUTION: Ground treatment such as chromate treatment is applied, if required, on the whole or a part of a steel tube 1 from which rust and the like on its surface are removed by blasting, pickling or the like, and if required, organic polymer resin coated layers such as a urethane coated layer 2, a primer layer 3, a bonding agent layer 4, a polyolefin corrosion-resistive layer 5 and the like are formed on the surface of the steel tube 1 in compliance with the environment of use. Then, a metal material 8 composed of a corrosive metal such as ordinary steel is wound on the whole or a part of the coated layer. The thickness of corrosive metal is preferably in the range of 0.1-5mm.

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