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1. 发明专利

JPH07173688A MANUFACTURE OF STEEL SHEET FOR WELDED CAN EXCELLENT IN COATING APPEARANCE 失效
公开(公告)号：JPH07173688A
公开(公告)日：1995-07-11
申请号：JP31806493
申请日：1993-12-17
申请人： NIPPON STEEL CORP
发明人： OYAGI YASHICHI , HIRANO SHIGERU , ICHIKAWA TAKASHI
IPC分类号： C25D11/38 , C23C28/00 , C25D5/12 , C25D5/26 , C25D5/50
摘要： PURPOSE:To provide a manufacturing method of the material for a welded can excellent in the coating appearance. CONSTITUTION:After Fe-Ni alloy plating is executed on the steel sheet by using a plating bath containing one kind or more among >=20ppm citric acid, tartaric acid, and lactic acid. and the Sn plating is executed. Then, the molten tin treatment is executed, and the chromate treatment is executed to manufacture the material for welded can excellent in the coating appearance. The coated steel sheet for welded can is manufactured by executing the baking at high temperature exceeding the melting point of Sn using this manufactured nateruak for welded can.

2. 发明专利

JPH0665789A MATERIAL FOR WELDED CAN EXCELLENT IN HIGH-SPEED SEAM WELDABILITY, RESISTANCE TO CORROSION AND HEAT AND COATING ADHESION 失效
公开(公告)号：JPH0665789A
公开(公告)日：1994-03-08
申请号：JP22311192
申请日：1992-08-24
申请人： NIPPON STEEL CORP
发明人： OGA TOMOYA , HIRANO SHIGERU , ICHIKAWA TAKASHI , KATAYAMA TOSHINORI
IPC分类号： C23C18/36 , C23C28/00 , C25D5/10 , C25D11/38
摘要： PURPOSE:To produce a material for the welded can excellent in high-speed seam weldability, resistances to corrosion and heat and coating adhesion by successively forming an Ni-Fe alloy plating layer, an Sn plating layer and a chromate coating film on the surface of a steel sheet under specified conditions. CONSTITUTION:An Ni-Fe alloy plating layer (contg. about 10-80wt.% Fe) or an Ni-P alloy plating layer (contg. about 0.1-10wt.% P) is formed on the surface of a steel sheet at 150-2500mg/m per side. An Sn plating layer, in which the Sn plating grains having 0.2-12.0mum diameter are interspersed at 400-2800mg/m , is formed on the plating layer, and further, a chromate coating film is formed on the Sn plating layer at 1-50mg/m expressed in terms of chromium. When the coated material is baked at high temp. for a short time and then high-speed seam welded, a material for the welded can having a sufficiently wide appropriate welding range and excellent in coating adhesion and corrosion resistance after coating is obtained.

3. 发明专利

JPH05106090A MATERIAL FOR WELDED CAN EXCELLENT IN SEAM WELDABILITY AND ADHESIVE STRENGTH OF PAINT 失效
公开(公告)号：JPH05106090A
公开(公告)日：1993-04-27
申请号：JP29392291
申请日：1991-10-15
申请人： NIPPON STEEL CORP
发明人： KATAYAMA TOSHINORI , ICHIKAWA TAKASHI , INOUE MITSUTOSHI , OGA TOMOYA
IPC分类号： C23C28/00 , C25D5/10 , C25D11/38
摘要： PURPOSE:To provide the material for a welded can having a wide suitable welding range at the time of manufacturing a can by welding. CONSTITUTION:The surface of a steel sheet is applied with an Ni plating layer of 150 to 2500mg/m , its surface is applied with an Sn plating layer in which Sn grains having 0.2 to 4mu grain size are scattered by 10 to 400mg/m and its surface is applied with a chromate film to form the material for a welded can. This cover is valued as the material for a can showing excellent seam weldability because the contact resistance between steel sheets is small and excellent in corrosion resistance after coating as well.

4. 发明专利

JPS62284086A PRODUCTION OF SN MULTILAYER-COATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE, WELDABILITY, AND COATING PERFORMANCE 失效
公开(公告)号：JPS62284086A
公开(公告)日：1987-12-09
申请号：JP12856886
申请日：1986-06-03
申请人： NIPPON STEEL CORP
发明人： HIGUCHI YUKINOBU , OGA TOMOYA , KORIYA HIDETOMO , NAKANO HIROBUMI , YOKOYA HIROICHI , ICHIKAWA TAKASHI
IPC分类号： C23C22/24 , C23C28/00
摘要： PURPOSE:To improve the corrosion resistance, electric weldability, and coating performance of a steel sheet by laminating an Ni planted layer, an Ni-Fe plated layer, and an Sn plated layer on the surface of the steel sheet, heating and melting the layers, and then forming a chromate coated film. CONSTITUTION:The lowermost Ni plated layer in 3-150mg/m deposition amt. per one face is provided on the surface of a steel sheet. the Ni-Fe alloy plated layer contg. deposition amt., and further the Sn plated layer is laminated in 300-2,000mg/m . The material is subsequently heated and melted at 235-280 deg.C, and a dense alloy layer having excellent corrosion resistance is formed by the brief alloying reaction between the substrate coated layer and the Sn layer. A chromate coated film layer is formed on the laminated plated layer in 5-50mg/m deposition amt., expressed in temrs of metallic Cr. An Sn multilayer coated steel sheet having excellent weldability, coating property, and corrosion resistance after coating can be obtained by this method.

5. 发明专利

JPH06116790A STOCK FOR WELDED CAN EXCELLENT IN HIGH SPEED SEAM WELDABILITY, PITTING CORROSION RESISTANCE, HEAT RESISTANCE AND ADHESION OF COATING MATERIAL 失效
公开(公告)号：JPH06116790A
公开(公告)日：1994-04-26
申请号：JP26388992
申请日：1992-10-01
申请人： NIPPON STEEL CORP
发明人： OGA TOMOYA , HIRANO SHIGERU , ICHIKAWA TAKASHI , KATAYAMA TOSHINORI
IPC分类号： C23C22/00 , C23C28/00 , C25D3/56 , C25D5/26 , C25D11/38
摘要： PURPOSE:To improve the high speed seam weldability, pitting corrosion resistance, adhesion of coating material or the like in the stock for a welded can, on the surface of a steel sheet applied with a prescribed amt. of Ni alloy plated layer, by furthermore forming an Sn plated layer and a chromate film under prescribed conditions. CONSTITUTION:The surface of a steel sheet is plated with an Ni-Fe alloy layer or an Ni-P alloy to form a plated layer of 2 to 150mg/m . Its surface is coated with an Sn plated layer, and in which Sn plating grains having 0.2 to 12mu grain size are scattered in a ratio of 10 to 2800mg/m . Moreover, a chromate film of 1 to 50mg/m in terms of chromium) is formed thereon. This stock for a welded can is excellent in high speed seam weldability, pitting corrosion resistance, heat resistance and the adhesion of coating material.

6. 发明专利

JPH06116747A BLANK FOR WELDED CAN HAVING EXCELLENT HIGH SPEED SEAM-WELDABILITY, CORROSION RESISTANCE, HEAT RESISTANCE AND COATING ADHESION 失效
公开(公告)号：JPH06116747A
公开(公告)日：1994-04-26
申请号：JP26838092
申请日：1992-10-07
申请人： NIPPON STEEL CORP
发明人： OGA TOMOYA , HIRANO SHIGERU , ICHIKAWA TAKASHI , KATAYAMA TOSHINORI
IPC分类号： C23C22/00 , C23C28/00 , C25D3/12 , C25D5/10 , C25D11/38 , C25D15/02
摘要： PURPOSE:To develop a blank for welded can having excellent high speed seam- weldability, corrosion resistance, heat resistance and coating adhesion by forming Ni plating layer on the surface of a steel sheet and further, forming an Sn plating layer with SN grains spotted and chromate film on this surface. CONSTITUTION:After activating and cleaning the surface of the cold-rolled and annealed steel sheet by pre-treatment of alkali electrolytic degreasing, electrolytic pickling, etc., the electric plating of Ni is executed at 2-150mg/m of the steel sheet. Further, on this surface, the Sn plating in which the Sn grain having 0.2-12.0mum grain diameter is spotted is applied at the ratio of 10-2800mg/m and finally, on this surface, the chromate film having 1-50mg/m expressed in terms of Cr is formed. The steel sheet having excellent high speed sea-weldability, corrosion resistance and coating adhesion as the blank for welded can and which can be baked at a high temp. in a short time and having

7. 发明专利

JPH05320853A PRODUCTION OF GALVANNEALED STEEL SHEET HAVING GOOD PLATING ADHESION 失效
公开(公告)号：JPH05320853A
公开(公告)日：1993-12-07
申请号：JP13084292
申请日：1992-05-22
申请人： NIPPON STEEL CORP
发明人： NAGAI KAZUNORI , SUGIYAMA SEIJI , ICHIKAWA TAKASHI , BABA TAKASHI
IPC分类号： C23C2/06 , C23C2/28
摘要： PURPOSE:To provide the process for production which improves plating adhesion by lessening the formation of the GAMMA phase occurring in the problem that plating layers peel in a powdery form at the time of working the galvannealed steel sheet. CONSTITUTION:After a steel strip is plated to a prescribed METSUKE (unit, 200-2000g/m ) weight in the production of the galvannealed steel sheet, the plated steel sheet is subjected to a heating treatment at 480 to 550 deg.C to adjust the iron concn. in the plating layer to 5 to 7%; thereafter, the plated steel strip is cooled down to

8. 发明专利

JPH05106091A MATERIAL FOR WELDED CAN EXCELLENT IN SEAM WELDABILITY AND ADHESIVE STRENGTH OF PAINT 失效
公开(公告)号：JPH05106091A
公开(公告)日：1993-04-27
申请号：JP29392391
申请日：1991-10-15
申请人： NIPPON STEEL CORP
发明人： KATAYAMA TOSHINORI , ICHIKAWA TAKASHI , INOUE MITSUTOSHI , OGA TOMOYA
IPC分类号： C23C28/00 , C25D5/10 , C25D11/38
摘要： PURPOSE:To provide the material for a welded can having a wide suitable welding range at the time of manufacturing a can by welding and excellent in adhesive strength of paint. CONSTITUTION:The surface of a steel sheet is applied with an Ni-Fe alloy or Ni-P alloy plating layer of 100 to 2500mg/m , its surface is applied with an Sn plating layer in which Sn grains having 0.2 to 4mu grain size are scattered by 10 to 400mg/m and its surface is applied with a chromate film to form the material for a welded can. This cover is valued as the material for a can excellent in seam weldability because the contact resistance between steel sheets is small and excellent in corrosion resistance after coating as well.

9. 发明专利

JPH02122092A PRODUCTION OF STEEL SHEET PLATED WITH PB-SN ALLOY EXCELLENT IN CORROSION RESISTANCE 失效
公开(公告)号：JPH02122092A
公开(公告)日：1990-05-09
申请号：JP27543388
申请日：1988-10-31
申请人： NIPPON STEEL CORP
发明人： HIGUCHI YUKINOBU , MIZUGUCHI TOSHINORI , ASAKAWA KENICHI , ICHIKAWA TAKASHI , NISHIMURA KUNIO
IPC分类号： C25D5/26 , C25D5/36
摘要： PURPOSE:To form a plated Pb-Sn alloy layer excellent in uniformity, adhesive properties and corrosion resistance by performing cathodic electrolytic treatment in the specified conditions before plating treatment of a substrate in the case of performing plating of the substrate by Ni and Co, etc., on the surface of a steel sheet inferior in surface property and thereafter plating Pb-Sn alloy. CONSTITUTION:In the case of forming a plated Pb-Sn alloy layer excellent in corrosion resistance on a steel sheet whose surface property id made inferior because graphite, carbon or Si, Mn and Al, etc., are concentrated on the surface, after the steel sheet is degreased and washed, cathodic electrolytic treatment is performed in an aq. soln. contg. both weight ratio of one or more kinds of Ni and Co to all SO concn. shown in a formula I and 50-250g/l free sulfuric acid at >5A/dm current density for 1-15sec. Then the plated layer of Ni, Co and Ni-Co alloy is formed at 0.01-1.0mum thickness and thereafter the plated layer of Pb-Sn alloy contg. 3-30% Sn is formed by a hot dipping method or an electroplating method. The plated Pb-Sn alloy layer excellent in corrosion resistance can be formed on the steel sheet inferior in surface property.

10. 发明专利

JPS5616696A PREPARATION OF ELECTROLYTIC CHROMIC ACID TREATED STEEL SHEET HAVING HIGH ADHESIVE STRENGTH 失效
公开(公告)号：JPS5616696A
公开(公告)日：1981-02-17
申请号：JP8980379
申请日：1979-07-17
申请人： NIPPON STEEL CORP
发明人： MIYAKE NORITSUGU , ICHIKAWA TAKASHI
IPC分类号： C25D11/38
摘要： PURPOSE:To inexpensively obtain the electrolytic chromic acid treated steel sheet having a superior adhesive property, by electrolytically treating the steel sheet in aqueous solution of chromic anhydride etc. making the steel sheet as cathode and next, electrolytically treating it again after carrying out nonelectrolytic dippling treatment in the same aqueous solution at a fixed time and then, washing by water and drying. CONSTITUTION:>=0.5sec nonelectrolytic treatment is carried out in the following component aqueous solution and the upper chromate layer having a high hydration degree, is eluted and exfoliated after electrolytically treating the steel sheet in aqueous solution of chromic anhydride, chromate, etc. making the steel sheet as cathode, at the time of manufacturing the above-mentioned steel sheet having the coating composed of metallic Cr inner layer and chromate outer layer. Next, chromate layer having a low hydration degree is forme by electrollytically treating the steel sheet with a suitable current density in the same bath again and 0.5-15sec treatment is carried out by 65-100 deg.C, >=4pH high temperature water and then, the above-mentioned steel sheet having a low deteriorating property on standing, is inexpensively obtaned. 2.5coulomb/dm cathode electrolytic treatment is allowed to carry out in aqueous solution of alkali metal etc. controlled >1.5pH,

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