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    CHROMIUM(III) CARBONATE AND PROCESS FOR PRODUCTION OF SAME
    4.
    发明公开
    CHROMIUM(III) CARBONATE AND PROCESS FOR PRODUCTION OF SAME 审中-公开
    CHROM（III）-CARBONAT UND HERSTELLUNGSVERFAHRENDAFÜR

    公开(公告)号：EP2322483A1

    公开(公告)日：2011-05-18

    申请号：EP09811441.6

    申请日：2009-08-27

    申请人： Nippon Chemical Industrial Co., Ltd.

    发明人： KUWANO Hiroyuki ,  BANDA Tomohiro ,  TANAKA Yasuyuki

    IPC分类号： C01G37/00 ,  C25D21/14

    CPC分类号： C25D3/10 ,  C01G37/00 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C23C2222/10 ,  C25D3/06

    摘要： The chromium (III) carbonate of the present invention exhibits a light blue color in a solid state. This chromium (III) carbonate has an L* value of 50 to 70, an a* value of -4 to -2, and a b* value of -10 to -7, which are represented by the L*a*b* color system (JIS Z8729). This chromium (III) carbonate is preferably completely dissolved within 30 minutes when the chromium (III) carbonate is added, in an amount corresponding to a Cr content of 1 g, to 1 liter of an aqueous solution of hydrochloric acid having a pH of 0.2 at a temperature of 25°C. This chromium (III) carbonate is preferably obtained by contacting an aqueous solution of carbonate and an aqueous solution containing trivalent chromium at a pH of 6 to 12 under the condition of a reaction liquid temperature of 0°C or more and less than 50°C. Also, preferably, after production of the chromium (III) carbonate, filtration is performed, and the chromium (III) carbonate is washed with water until the conductivity of the filtrate is 5 mS/cm or less.

    摘要翻译： 本发明的碳酸铬（III）表现出固态的淡蓝色。 该碳酸铬（III）的L *值为50〜70，a *为-4〜-2，ab *为-10〜-7，由L * a * b *颜色 系统（JIS Z8729）。 当碳酸铬（III）以相当于Cr含量1g的量加入到1升pH为0.2的盐酸水溶液中时，碳酸铬（III）优选在30分钟内完全溶解 在25℃的温度下。 该碳酸铬（III）优选通过在反应液温度为0℃以上且小于50℃的条件下使碳酸盐水溶液和含有3价铬的水溶液在pH6〜12下接触而得到 。 此外，优选在碳酸铬（III）的制造之后，进行过滤，并用水洗涤碳酸铬（III）直到滤液的电导率为5mS / cm以下。

    Method for Electroplating a plastic substrate
    5.
    发明公开
    Method for Electroplating a plastic substrate 审中-公开
    Verfahren zum Elektroplattieren eines Kunststoffsubstrats

    公开(公告)号：EP2108716A2

    公开(公告)日：2009-10-14

    申请号：EP09157429.3

    申请日：2009-04-06

    申请人： Shenzhen Futaihong Precision Industry Co., Ltd. ,  FIH (Hong Kong) Limited

    发明人： SU, Jong-Yi ,  CHEN, Cheng-Shin ,  WANG, Ren-Ning

    IPC分类号： C25D3/04 ,  C25D3/10 ,  C25D5/14 ,  C25D5/56 ,  C23C28/02

    CPC分类号： C25D5/14 ,  C23C28/023 ,  C25D3/04 ,  C25D3/10 ,  C25D5/56

    摘要： A method for electroplating a plastic substrate includes the following steps a plastic substrate is firstly provided. The plastic substrate is then pretreated to form a noble metal coating. The noble metal coating is coated with a copper coating. A first chrome coating is electroplated onto the copper coating using a first electrolyte including a chromic component. A second chrome coating is electroplated onto the first chrome coating using a second electrolyte including a chromyl component.

    摘要翻译： 一种电镀塑料基板的方法包括以下步骤：首先提供塑料基板。 然后将塑料基材预处理以形成贵金属涂层。 贵金属涂层涂有铜涂层。 使用包含铬组分的第一电解质将第一镀铬层电镀到铜涂层上。 使用包含染色体组分的第二电解质将第二镀铬层电镀到第一镀铬层上。

    HERSTELLUNG EINER STRUKTURIERTEN HARTCHROMSCHICHT UND HERSTELLUNG EINER BESCHICHTUNG
    7.
    发明公开
    HERSTELLUNG EINER STRUKTURIERTEN HARTCHROMSCHICHT UND HERSTELLUNG EINER BESCHICHTUNG 有权
    制备结构HARTCHROM加层制造涂布

    公开(公告)号：EP1738000A2

    公开(公告)日：2007-01-03

    申请号：EP05700700.7

    申请日：2005-01-05

    申请人： Federal-Mogul Burscheid GmbH

    发明人： LINDE, Rudolf ,  DÜRDOTH, Stefan ,  STUCKERT, Wolfgang

    IPC分类号： C25D3/10 ,  C25D11/38 ,  C25D15/02 ,  C25D5/14 ,  C25D5/12

    CPC分类号： C25D3/10 ,  C25D5/12 ,  C25D5/48

    摘要： The invention relates to a method for producing a structured hard chromium layer, during which chromium from an electrolyte is deposited onto a workpiece, which contains: a) a Cr(VI) compound in a quantity corresponding to between 50 and 300 g/l of chromic anhydride; b) 0.5 g/l to 10 g/l sulfuric acid, and; c) 5 g/l to 15 g/l aliphatic sulfonic acid having 1 to 6 carbon atoms. The electrolyte contains essentially no compounds from the group consisting of ammonium molybdate, alkaline molybdate, alkaline earth molybdate, ammonium vanadate, alkaline vanadate and alkaline earth vanadate, ammonium zirconate, alkaline zirconate and alkaline earth zirconate, and is processed with a cathodic efficiency of 12 % or less. The invention also relates to a method for producing a coating, to a structured hard chromium layer, a coating and an electrolyte.

    GALVANISCHES BAD UND VERFAHREN ZUR ERZEUGUNG STRUKTURIERTER HARTCHROMSCHICHTEN UND VERWENDUNG
    9.
    发明公开
    GALVANISCHES BAD UND VERFAHREN ZUR ERZEUGUNG STRUKTURIERTER HARTCHROMSCHICHTEN UND VERWENDUNG 有权
    电镀槽及其制造方法结构化HARTCHROM层和USE

    公开(公告)号：EP1097261A2

    公开(公告)日：2001-05-09

    申请号：EP99931178.0

    申请日：1999-06-24

    申请人： Cromotech Oberflächentechnik GmbH

    发明人： SZAMEITAT, Klaus

    IPC分类号： C25D1/00

    CPC分类号： C25D3/10 ,  B41N7/04 ,  B41N2207/02 ,  B41N2207/10

    摘要： The invention relates to a galvanic bath, to a method for precipitating chromium onto objects using said galvanic bath, and to the use of this method for producing structured hard chromium layers on machine parts. The galvanic bath contains at least one compound which provides chromium (VI) ions, in an aqueous solution, and comprises a) a quantity of chromium (VI) ions corresponding to 100 to 600 g/l chromic acid anhydride, b) sulphate ions in the form of sulphuric acid and/or a soluble salt thereof, the molar concentration ratio of chromium (VI) ions to sulphate ions (SO42-) being 90:1 to 120:1 and c) a quantity of 2-hydroxyethane sulphonate ions corresponding to 0.01 to 3.0 g/l of the sodium salt.

    High performance electrodeposited chromium layers
    10.
    发明公开
    High performance electrodeposited chromium layers 失效
    Mit hoher Leistung elektroplattierte Chromium-Schichten。

    公开(公告)号：EP0278044A1

    公开(公告)日：1988-08-17

    申请号：EP87109890.1

    申请日：1987-07-08

    申请人： ELF ATOCHEM NORTH AMERICA, INC.

    发明人： Korbach, William C. ,  McMullen, Warren H.

    IPC分类号： C25D3/10 ,  C25D3/04

    CPC分类号： C25D3/10 ,  C25D3/04

    摘要： Novel electrodeposited chromium layers, processes for their electrodepositions and plating baths suitable for use therein are disclosed. The chromium layers are bright, adherent, smooth, hard, wear resistant, exhibit a low coefficient of friction, thus, providing increased life and efficiency for devices employing the layers as wear sur­faces, and are capable of being formed at both high and low current densities.

    摘要翻译： 公开了新的电沉积铬层，其电沉积工艺和适用于其中的电镀浴。 铬层是明亮的，粘附的，光滑的，硬的，耐磨的，表现出低的摩擦系数，从而为使用这些层作为磨损表面的装置提供更高的使用寿命和效率，并且能够在高电流和低电流下形成 密度。