• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1514816 Electro-plating nickel-iron alloy OXY METAL INDUSTRIES CORP 23 May 1975 [3 March 1975] 22803/75 Heading C7B A metallic substrate, e.g. a Cu, brass or steel panel preferably electro-plated with a Cu layer (e.g. 10 or 15Ám thick), is electro-plated first with at least one Ni-Fe alloy first layer (e.g. at least 10Ám thick) having a relatively high Fe content of 15 to 40%, then with at least one second layer of Ni-Fe alloy (e.g. 2.5 to 10Ám thick) having a relatively lower Fe content of 5 to 14%. The uppermost Ni-Fe alloy layer may be electro-plated with a Ni layer (e.g. 3Ám thick) preferably microcracked and having inorganic particle inclusions therein, in turn electro-plated with a microdiscontinuous, preferably micro-cracked Cr layer (e.g. 0.25 to 0.4Ám thick). The Ni-Fe alloy composite may be electro-deposited from a plurality of solutions or the same solution containing one or more salts of Ni and Fe, e.g. nickel and ferrous sulphate, chloride, sulphamate and/or fluoroborate, with complexing agents such as hydroxy C 2-8 aliphatic carboxylic acids e.g. citric, malic, glutaric, gluconic, muconic, glutamic, glucoheptonic, glycolic or aspartic acid, at pH 2.5 to 5.5 and C.D. 10 to 70 ASF. With the same solution, the reduction of Fe content can be achieved by reducing in stages air agitation (for high Fe content) to nil (for lower Fe content). Soluble anodes of Fe or Ni-Fe alloy may be used. S-O compound or acetylenic Ni brighteners or organic sulphides may be used in the plating bath.
    公开号:SU882417A3
    申请号:SU752150652
    申请日:1975-06-30
    公开日:1981-11-15
    发明作者:Джон Клаусс Ричард；Арнольд Треммел Роберт
    申请人:Окси Метал Индастриз Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    (54) METHOD OF RECEIVING PROTECTIVE AND DECORATIVE MULTIPLE COATINGS
    The invention relates to electroplating, in particular, to making coatings on steel, copper / brass and metal products.
    There is a known method for producing decorative decorative multilayer coatings, including electroplating deposition of nickel layers with inorganic inclusions and microporous and / or microthorny chromium. The known crtoco6 also includes the deposition of layers of copper and brilliant nickel, i.e. The multilayer coating consists of 4 layers of Cu - Ni-Ni-SilSch 1.
    The known method allows to obtain high quality coatings.
    However, their corrosion resistance is insufficient.
    The aim of the invention is to increase the corrosion resistance of coatings.
    This goal is achieved by the fact that before applying a nickel layer, two layers of an iron-nickel alloy with an iron content of 15-40 and 5-14% are deposited.
    The method is carried out as follows.
    The product of iron or copper (or copper sublayer) is galvanically applied to the first layer of iron-nickel alloy with a relatively high iron absorption, onto which a second layer of iron-nickel alloy with a relatively low iron content is applied, after which a layer of nickel is applied. which causes the occurrence of micro-inhomogeneities in the subsequent layer of chromium.
    The iron-nickel alloy can be applied in two or more layers,
    15 i.e. reduction of iron content in the alloy can be provided gradually in several stages, for example, air mixing for high iron content, moderate mixing for reducing iron content and absence of mixing for its low content can be used. Such a sequence of steps can be carried out in a single electrolyte or in several. The optimum thickness of the lowermost layer of the iron-nickel alloy (15-40% Fe) is 10 microns and bo; more (depending on the conditions of the x30 operation), the thickness of the alloy layer with
    the low iron content (5-14%) is 2.5-10 µm.
    Electrolytic iron-nickel alloy deposition is carried out in an electrolyte containing soluble salts (one or more) of iron and nickel, complexing agent for iron ions in 15 to 10-100 g / l, for example, a substance containing carboxyl and hydroxyl groups (lemon, block, glutaral, gluconic acid, muconic acid and the like).
    Process wasps, x, values are recommended to be carried out at a pH of 2.5-5.5, a temperature of 49-82 ° C and a current density of 1.1-7.8 using stirring (with or without it) using air, mechanical or hydraulic means.
    Example 1. A first layer of iron-nickel alloy with a thickness of 17.5 µm, containing 20.5–24.3%, and then a nano with a second layer of alloy containing 9.0–10.0% of iron, is deposited on two steel panels. Nickel with inorganic inclusions is deposited on these layers, and the thickness of this coating layer is different on different panels. A layer of chromium with a thickness of 0.25 µm is then galvanized onto the nickel layers. Chromium is precipitated by microporous due to inorganic inclusions in the nickel layer. After approximately three months of environmental testing under relatively harsh industrial conditions, the panels under test are checked — in order to determine whether or not the nickel layer is tolled to maintain a good exterior appearance of the decorative coatings.
    The effect of nickel layer thickness is well illustrated by the evaluation of panels according to the American Society for Testing Materials - ASTM - B537, where the highest rating is 10/10 (the numerator indicates the degree of protection for the coating of the base material, the denominator is the appearance of the coating).
    So, with a nickel layer thickness of 1.75 µm, this figure is 10/5, while for a nickel layer with a thickness of 3.25 µm, the figure was 10/9. A higher value than 5 indicates a significant improvement in appearance when applied over a alloy coating of a relatively thicker nickel coating,
    Example2. A 15 μm thick layer of copper is deposited on a steel substrate and an iron – nickel layer of 22 μm thick containing 22% Fe is deposited on it, then a second alloy layer is deposited, hold 9% Fe 5 μm thick, and a layer with inorganic inclusions is applied on it mi, 3 microns thick, and then microporous chromium 0.4 microns thick.
    After climatic testing for 11 months, the ASTM rating indicator is 10/9.
    In the case of the first deposition of a layer of iron-nickel alloy with low iron content (9%), and then high (22%) - this figure is 10/6, which indicates the importance of ensuring a high iron content in the alloy applied before the alloy layer low in iron.
    EXAMPLE 3. Steel panels, prepared in the same manner as in Example 2, are subjected to tests for 15 months in harsh industrial conditions.
    The test results also show the importance of providing a low iron content in the top layer of the 9% iron / nickel iron coating, according to ASTM 10/7, while the panel that had 22% iron in the top coating is 10/4.
    Both panels provide an excellent corrosion resistance of the steel base, however, the panel with a lower iron content in the outer layer has a significantly better appearance, jcoToporo score of 7 against 4 for the panel. A higher assessment of the appearance of the coated panel according to the present invention indicates that it has significantly less corrosion stains.
    The assessment of the corrosion resistance of coatings obtained by a known method and tested for 11 months in light and harsh conditions is 8/5 and 6/3, respectively (ASTM value is lower than 7 for both protection and for appearance is unsatisfactory).
    Thus, the invention makes it possible to obtain coatings with high corrosion resistance).
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    The method of obtaining protective and decorative multilayer coatings, including the electroplating deposition of nickel layers with inorganic inclusions and microporous and / or microcracked chromium, characterized in that, in order to increase the corrosion resistance of the coatings, before applying a layer of nickel, two layers of iron-nickel spppava are applied with an iron content of 15-40 and 5-14%, respectively.
    5882417 "
    Sources of informational corrosion resistance taken into account in the examination of Corzhi Corrosion and corrosion protection. Saifullin R.S. and etc. Precipitating 1974, 9, 9k 336,
    nickel-chrome plating with guilty s. 51.
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE2544041C3|1979-05-03|
    ES438351A1|1977-06-16|
    FR2303095A1|1976-10-01|
    AR206638A1|1976-08-06|
    DE2544041A1|1976-09-16|
    FR2303095B1|1978-10-20|
    DE2544041B2|1978-08-03|
    CA1024465A|1978-01-17|
    JPS5635755B2|1981-08-19|
    GB1514816A|1978-06-21|
    JPS51100940A|1976-09-06|
    US3994694A|1976-11-30|
    BR7504246A|1976-09-14|
    AU8172175A|1976-12-02|
    NL7507009A|1976-09-07|
    IT1035925B|1979-10-20|
    引用文献:
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    CA1009603A|1972-07-03|1977-05-03|Richard J. Clauss|Composite nickel iron electroplate|
    US3878067A|1972-07-03|1975-04-15|Oxy Metal Finishing Corp|Electrolyte and method for electrodepositing of bright nickel-iron alloy deposits|US4179343A|1979-02-12|1979-12-18|Oxy Metal Industries Corporation|Electroplating bath and process for producing bright, high-leveling nickel iron electrodeposits|
    JPS6358228B2|1981-06-26|1988-11-15|Nisshin Steel Co Ltd|
    US4411961A|1981-09-28|1983-10-25|Occidental Chemical Corporation|Composite electroplated article and process|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/554,843|US3994694A|1975-03-03|1975-03-03|Composite nickel-iron electroplated article|
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