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    • 21. 发明专利
    • Corrosion-resistant steel material for ship ballast tank having excellent corrosion resistance and method for producing the same
    • 具有优异耐腐蚀性的船用耐压钢板的耐腐蚀钢材料及其制造方法
    • JP2013019049A
    • 2013-01-31
    • JP2012133773
    • 2012-06-13
    • Jfe Steel CorpJfeスチール株式会社
    • SHIOTANI KAZUHIKOKOMORI TSUTOMU
    • C22C38/00B63B11/04B63B59/00B63B59/04C21D8/00C22C38/58
    • PROBLEM TO BE SOLVED: To provide an inexpensive corrosion-resistant steel material for a ship ballast tank having excellent corrosion resistance, which exhibits corrosion resistance even under a seawater corrosive environment such as a ship ballast tank, and in which the extension of a period to paint refinishing is made possible, and therefore, the reduction in the operation of paint refinishing can be achieved, and a method for producing the same.SOLUTION: The corrosion-resistant steel material for a ship ballast tank is obtained by heating a steel stock having a composition comprising, by mass, 0.03 to 0.20% C, 0.05 to 0.50% Si, 0.7 to 2.0% Mn, ≤0.035% P, ≤0.01% S, ≤0.10% Al, 0.02 to 0.2% Sn, 0.003 to 0.03% Nb, 0.005 to 0.030% Ti and 0.0010 to 0.010% N, and in which the contents of Cu, Ni and Cr are controlled to
    • 要解决的问题:为了提供具有优异耐腐蚀性的船用压载舱的廉价的耐腐蚀钢材料,即使在诸如船舶压载舱的海水腐蚀环境下也具有耐腐蚀性,并且其中延伸 可以实现油漆修补的时间,因此可以实现油漆修补的操作的减少及其制造方法。 解决方案:用于船舶压载舱的耐腐蚀钢材是通过加热含有0.03〜0.20%C,0.05〜0.50%Si,0.7〜2.0%Mn,≤ 0.035%P,≤0.01%S,≤0.10%Al,0.02〜0.2%Sn,0.003〜0.03%Nb,0.005〜0.030%Ti和0.0010〜0.010%N,其中Cu,Ni和Cr的含量为 控制在<0.20%,<0.20%和<0.20%,余量为Fe与不可避免的杂质在1,000至1350℃,然后在600至<800℃的温度范围内进行精轧,并进行冷却。 版权所有(C)2013,JPO&INPIT
    • 22. 发明专利
    • Steel for ship having excellent coating corrosion resistance
    • 具有优异涂层耐腐蚀性能的钢
    • JP2012092404A
    • 2012-05-17
    • JP2010241674
    • 2010-10-28
    • Jfe Steel CorpJfeスチール株式会社
    • TACHIBANA SHUNICHISHIOTANI KAZUHIKOKOMORI TSUTOMUHOSHINO TOSHIYUKI
    • C22C38/00B32B15/08C22C38/60C23C26/00
    • PROBLEM TO BE SOLVED: To provide a steel for a ship having excellent coating corrosion resistance, which has no need of performing repair coating for up to 25 years which is a ship design life even in a severe seawater corrosive environment of the ballast tank, etc. of the ship.SOLUTION: The steel having high coating corrosion resistance has a chemical composition including, by mass%, 0.01 to 0.20% C; 0.01 to 2.5% Si; 0.1 to 2.0% Mn; ≤0.03% P; ≤0.01% S; 0.005 to 0.3% Al; and ≤0.008% N; and further contains one or more elements selected from 0.005 to 3.0% Mo; 0.005 to 3.0% W; 0.005 to 2.0% Cu; 0.005 to 5.0% Cr; 0.005 to 5.0% Ni; 0.005 to 1.0% Sb; 0.005 to 1.0% Sn; 0.001 to 0.5% V; 0.0001 to 0.01% Mg, the steel including a specific zinc primer.
    • 要解决的问题:提供具有优异的耐腐蚀性的船舶的钢,其不需要执行修复涂层长达25年,即使​​在严格的海水腐蚀性环境中的船舶设计寿命 坦克等。 解决方案:具有高涂层耐腐蚀性的钢具有以质量%计含有0.01至0.20%C的化学组成; 0.01〜2.5%Si; 0.1〜2.0%Mn; ≤0.03%P; ≤0.01%S; 0.005〜0.3%的Al; 和≤0.008%N; 并且进一步含有选自0.005〜3.0%Mo的一种或多种元素; 0.005〜3.0%W; 0.005〜2.0%的Cu; 0.005〜5.0%Cr; 0.005〜5.0%Ni; 0.005〜1.0%Sb; 0.005〜1.0%Sn; 0.001〜0.5%V; 0.0001〜0.01%的Mg,钢包含特定的锌底漆。 版权所有(C)2012,JPO&INPIT
    • 23. 发明专利
    • Steel material superior in corrosion resistance after having been painted
    • 涂有腐蚀电阻后的钢材超级电阻
    • JP2011179022A
    • 2011-09-15
    • JP2010041296
    • 2010-02-26
    • Jfe Steel CorpJfeスチール株式会社
    • KAGE ISAMUMURASE MASAJISHIOTANI KAZUHIKO
    • C22C38/00C22C38/60
    • PROBLEM TO BE SOLVED: To provide a steel material superior in corrosion resistance after having been painted, which is suitable for use in civil engineering and construction structures such as bridges, has a composition of comparatively inexpensive components, and has a surface appearance which is not damaged due to the corrosion of a defective portion even though the defective portion has occurred in a paint film. SOLUTION: The steel material includes, by mass%, more than 0.02% and equal to or less than 0.15% C, more than 0.1% and equal to or less than 0.7% Si, 0.2-1.5% Mn, 0.001-0.03% P, 0.0001-0.02% S, 0.01-0.1% Al, 0.3-1.0% Cr, further 0.01-0.2% in total of one or more of W, Sb and Sn, one or more of 0.1-0.5% Cu and 0.1-0.5% Ni as needed, and the balance Fe with unavoidable impurities. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了提供适用于土木工程和建筑结构如桥梁的涂漆之后的耐腐蚀性优异的钢材具有相对便宜的组分的组成,并且具有表面外观 即使缺陷部分发生在漆膜中,其也不会由于缺陷部分的腐蚀而损坏。 钢材以质量%计含有超过0.02%且等于或小于0.15%的C,大于0.1%且等于或小于0.7%的Si,0.2-1.5%的Mn,0.001- 0.03%P,0.0001-0.02%S,0.01-0.1%Al,0.3-1.0%Cr,进一步0.01-0.2%总量中的一种或多种W,Sb和Sn,一种或多种0.1-0.5%的Cu和 0.1-0.5%Ni,余量为Fe,不可避免的杂质。 版权所有(C)2011,JPO&INPIT
    • 25. 发明专利
    • Vessel ballast tank corrosion testing method
    • VESSEL BALLAST油罐腐蚀试验方法
    • JP2011064678A
    • 2011-03-31
    • JP2010182673
    • 2010-08-18
    • Jfe Steel CorpJfeスチール株式会社
    • SHIOTANI KAZUHIKOKOMORI TSUTOMU
    • G01N17/00
    • G01N17/006
    • PROBLEM TO BE SOLVED: To provide a corrosion testing method for evaluating corrosion on the back of the upper deck of a vessel ballast tank.
      SOLUTION: In a corrosion testing cycle in which a test specimen is installed in a wetting step A with a relative humidity of 75% or higher and a drying step B with a humidity of 75% or lower to repeat alternatively the wetting step A and the drying step B by at least 30 times, the corrosion testing method evaluates the back of the upper deck on a vessel ballast tank during a wetting step by imparting a salt content to one of an NaCl solution, an artificial sea water solution, or a natural sea water solution by a means of atomizing, dipping, or solution-providing to a test specimen at a rate of one out of 30 times or higher of the repetition number of the wetting step A and the drying step B in a state that a relationship between a time (At) for installing the test specimen in the wetting step A and a time (Bt) for installing the test specimen in the drying step B is 0.05≤Bt/At≤10 and a relationship between a wetting speed (Av) and a drying speed (Bv) is 0.1≤Bv/Av≤3.8.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供用于评估船舶压载舱上甲板背面的腐蚀的腐蚀测试方法。 解决方案:在腐蚀测试循环中,其中将试样安装在相对湿度为75%或更高的润湿步骤A和湿度为75%或更低的干燥步骤B中以可重复地重复润湿步骤 A和干燥步骤B至少30次,腐蚀测试方法在润湿步骤期间评估容器压载舱上甲板的背面,将盐含量赋予NaCl溶液,人造海水溶液, 或天然海水溶液,通过雾化,浸渍或溶液提供给试样,其速率为润湿步骤A和干燥步骤B的重复次数的30倍或更高的状态 在润湿步骤A中安装试样的时间(At)和干燥步骤B中安装试样的时间(Bt)之间的关系为0.05≤Bt/At≤10,润湿速度 (Av),干燥速度(Bv)为0.1≤Bv/Av≤3.8。 版权所有(C)2011,JPO&INPIT
    • 28. 发明专利
    • Corrosion resistant steel material for oil tank
    • 油罐耐腐蚀钢材
    • JP2014055334A
    • 2014-03-27
    • JP2012201662
    • 2012-09-13
    • Jfe Steel CorpJfeスチール株式会社
    • SHIOTANI KAZUHIKOMURASE MASAJI
    • C22C38/00C21D8/02C22C38/16C22C38/60
    • PROBLEM TO BE SOLVED: To provide a corrosion resistant steel material for an oil tank capable of efficiently preventing perforation of a bottom plate by suppressing pitting corrosion occurred in a bottom plate inner surface of the coated steel material in the oil tank for filling a crude oil, a heavy oil, a light oil and the like.SOLUTION: A component composition of a steel material is adjusted to be a composition containing, by mass%, C:0.03 to 0.25%, Si:0.01 to 0.50%, Mn:0.1 to 2.0%, P:0.035% or less, S:0.015% or less, Al:0.005 to 0.10%, N:0.001 to 0.01%, Nb:0.005 to 0.030%, Sn:0.01 to 0.2%, Cu:0.05 to 0.5% and Ni:0.03 to 0.3% and the balance Fe with inevitable impurities and solid solution Nb of 0.002% or more is contained in the steel material.
    • 要解决的问题:提供一种用于油罐的耐腐蚀钢材料,其能够通过抑制用于填充原油的油箱中的涂覆钢材的底板内表面中发生的点腐蚀,有效地防止底板的穿孔 ,重油,轻油等。溶液:将钢材的成分组成调整为以质量%计含有C:0.03〜0.25%,Si:0.01〜0.50%,Mn:0.1 至2.0%,P:0.035%以下,S:0.015%以下,Al:0.005〜0.10%,N:0.001〜0.01%,Nb:0.005〜0.030%,Sn:0.01〜0.2%,Cu:0.05〜 0.5%,Ni:0.03〜0.3%,余量为Fe的不可避免的杂质,固溶Nb为0.002%以上。
    • 30. 发明专利
    • Steel for ship excellent in coating corrosion resistance
    • 钢铁耐腐蚀性优良
    • JP2012091428A
    • 2012-05-17
    • JP2010241675
    • 2010-10-28
    • Jfe Steel CorpJfeスチール株式会社
    • TACHIBANA SHUNICHISHIOTANI KAZUHIKOKOMORI TSUTOMUHOSHINO TOSHIYUKI
    • B32B15/08B05D7/14C21D8/02C22C38/00C22C38/60
    • PROBLEM TO BE SOLVED: To provide a steel for a ship excellent in coating corrosion resistance, which needs no maintenance coating for 25 years, throughout its design life, even under a severe seawater corrosion environment such as a ballast tank of a ship.SOLUTION: In the steel for a ship having zinc primer-coated layer and an epoxy-coated layer, the steel contains, by mass%, 0.01-0.20% of C, 0.01-2.5% of Si, 0.1-2.0% of Mn, not greater than 0.03% of P, not greater than 0.03% of S, 0.005-0.3% of Al, and not greater than 0.008% of N, and further contains a predetermined amount of at least one element selected from the group consisting of Cu, Cr, Ni, Mo, W, Sb, and Sn, and the zinc primer-coated layer has a porosity of not greater than 30 vol.%, contains an alkyl silicate resin, and zinc dust, and contains a predetermined range of amount of at least one element selected from the group consisting of P, Mo, W, Cu, Ni, Sb, Sn, V, Al, and Mg.
    • 要解决的问题:为了提供耐腐蚀性优异的钢,在其整个设计寿命期间不需要维护涂层25年,即使​​在严重的海水腐蚀环境下,例如船舶的压载舱 。 解决方案:在具有锌底涂层和环氧涂层的船舶用钢中,以质量%计含有C 0.01-0.20%,Si:0.01〜2.5%,Si:0.1〜2.0% 的Mn,不大于0.03的P,不大于0.03的S,0.005-0.3%的Al和不大于0.008%的N,并且还含有预定量的至少一种选自组中的元素 由Cu,Cr,Ni,Mo,W,Sb和Sn构成,锌底涂层的孔隙率为30体积%以下,含有硅酸烷基酯树脂和锌粉,并含有预定的 选自P,Mo,W,Cu,Ni,Sb,Sn,V,Al和Mg中的至少一种元素的量的范围。 版权所有(C)2012,JPO&INPIT