ELECTROLYTIC DISSOLUTION OF CHROMIUM FROM CHROMIUM ELECTRODES
    5.
    发明公开
    ELECTROLYTIC DISSOLUTION OF CHROMIUM FROM CHROMIUM ELECTRODES 审中-公开
    ELEKTROLYTISCHEAUFLÖSUNGVON CHROM AUS CHROMELEKTRODEN

    公开(公告)号:EP2640873A4

    公开(公告)日:2017-03-29

    申请号:EP11841641

    申请日:2011-10-04

    发明人: PEARSON TREVOR

    IPC分类号: C25D5/18 C25D3/06

    CPC分类号: C25B1/00 C25D3/06 C25D21/18

    摘要: An electrolytic cell for replenishing chromium content of a trivalent chromium electrolyte and a method of replenishing trivalent chromium content using the electrolytic cell is provided. The method comprising the steps of immersing a chromium electrode and a second electrode in a trivalent chromium electrolyte and applying an alternating pulse current across the chromium electrode and the second electrode. In this manner, trivalent chromium is electrolytically dissolved from the chromium electrode and the trivalent chromium content of the electrolyte in which the chromium electrode is immersed is enriched.

    摘要翻译: 提供了一种用于补充三价铬电解质的铬含量的电解槽和使用该电解槽补充三价铬含量的方法。 该方法包括以下步骤:将铬电极和第二电极浸入三价铬电解质中,并在铬电极和第二电极上施加交变脉冲电流。 以这种方式,从铬电极电解溶解三价铬,并且富集铬电极的电解质的三价铬含量。

    DARK COLORED CHROMIUM BASED ELECTRODEPOSITS
    6.
    发明公开
    DARK COLORED CHROMIUM BASED ELECTRODEPOSITS 审中-公开
    深色领导职务,对铬BASE

    公开(公告)号:EP2635723A4

    公开(公告)日:2015-10-07

    申请号:EP11838391

    申请日:2011-08-16

    IPC分类号: C25D3/06 C25D3/08 C25D15/00

    摘要: An aqueous acidic trivalent chromium electrolyte comprising trivalent chromium ions and a complexing agent for maintaining the trivalent chromium ions in solution is provided in which the aqueous electrolyte comprises additives capable of producing a coating on a substrate having a desired dark hue. The additives typically comprise a dispersion of colloidal silica and an additional additive selected from thiocyanate ions and/or iron ions. The electrolyte is used in a method of producing the desired dark-hued decorative chromium coating on a substrate by electrodeposition.

    SEMI-BRIGHT NICKEL PLATING BATH AND METHOD OF USING SAME
    10.
    发明公开
    SEMI-BRIGHT NICKEL PLATING BATH AND METHOD OF USING SAME 有权
    电镀半翊镍及使用方法

    公开(公告)号:EP2683853A1

    公开(公告)日:2014-01-15

    申请号:EP12754802.2

    申请日:2012-02-08

    IPC分类号: C25D3/12 B05D5/12

    CPC分类号: C25D3/16

    摘要: A nickel plating bath for plating a semi-bright nickel deposit on a substrate comprising a) nickel sulfations; b) a soluble salt of chloroacetic acid, acetic acid, glycolic acid, proprionic acid, benzoic acid, salicylic acid or chlorobenzoic acid; and c) at least one diol selected from the group consistmg of hexyne diol, butyne diol and combinations of the foregoing. The semi-bright nickel plating bath described herein produces sulfur-free semi-bright deposits over a very wide current density range. The plating bath described herein is at least substantially free of coumarm and produces desirable leveling characteristics. The bath also requires no aldehydes to achieve simultaneous thickness and electrolytic potential (STEP) and has extremely low stress and excellent ductility.