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Electroplated quaternary alloys

a technology of electroplating and quaternary alloys, applied in the field of electroplating quaternary alloys, can solve the problems of restricted use of chromium (vi) and its compounds in certain applications, and achieve the effects of increasing the bright plating range, and facilitating deposition of metal ions

Inactive Publication Date: 2005-08-11
TASKEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0005] The present invention provides quaternary alloys containing at least nickel and cobalt that have a mirror bright deposit and a hardness on par with chrome. At least two of many other alloy metals, such as iron and boron, are also contained in the quaternary alloys. In this context, the quaternary alloys contain at least four metal components. The desirable characteristics of the quaternary alloys made in accordance with the present invention are, at least in part, attributable to the use of certain brighteners in the electroplating bath. The brighteners facilitate deposition of metal ions on the cathode in such a manner as to result in electroplated nickel cobalt quaternary alloys having numerous desirable properties. For example, the brighteners facilitate deposition of metal ions at relatively low current densities, thereby increasing the bright plating range. Consequently, the nickel cobalt quaternary alloys may take the place of electroplated chrome and chromium alloys, thereby providing potential environmental benefits.

Problems solved by technology

However, the use of chromium (VI) and its compounds are restricted in certain applications in some areas, primarily in the European Union.

Method used

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Embodiment Construction

[0009] The present invention provides quaternary alloys made by electroplating that exhibit two or more of high brightness, high luster, level / smoothness, uniform thickness, high hardness, high reflectivity, ductile, high density, resistant to corrosion, resistant to heat, and resistant to wear. Typically, the quaternary alloys made in accordance with the present invention have a mirror bright deposit and a hardness on par with chrome. Electroplating involves metal in ionic form migrating in solution from a positive electrode (anode) to a negative electrode (cathode). The anode and cathode are connected to a power source and an electrical current is passed through the electroplating bath or solution causing substrates at the cathode to be coated by the metal (nickel, cobalt, and at least two alloy metals) in solution. In most embodiments, the substrate to be plated is the cathode.

[0010] The cathodes are any electrically conductive material that can accommodate a nickel cobalt quate...

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Abstract

Disclosed are methods of electroplating a quaternary alloy containing nickel, cobalt, and at least two metal alloys involving providing an electroplating bath comprising ionic nickel, ionic cobalt, at least two ionic alloy metals, and at least one brightener; and applying a current to the electroplating bath whereby a quaternary alloy forms.

Description

FIELD OF THE INVENTION [0001] The present invention generally relates to quaternary alloys containing at least nickel and cobalt that may be employed in place of chrome and chrome alloys and methods of making the quaternary alloys. BACKGROUND OF THE INVENTION [0002] Chromium is steel-gray, lustrous, hard, metallic, and takes a high polish. Chromium is a naturally occurring element present in the environment in several different forms. The most common forms are chromium (0), chromium (III), and chromium (VI). The metal chromium, which is the chromium (0) form, is used for making steel. Chromium (VI) and chromium (III) are often used for chrome plating. Chromium (VI) is used as an anti-corrosion treatment and as an electrical shielding material for certain sheet metals. There are many desirable characteristics associated with chromium plating. [0003] However, the use of chromium (VI) and its compounds are restricted in certain applications in some areas, primarily in the European Unio...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C25D3/56
CPCC25D3/562
Inventor BOKISA, GEORGEECKLES, WILLIAM E.FRISCHAUF, ROBERT E.
Owner TASKEM
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