Preparation method of plastic-based copper-chromium double-layered environmental-friendly wear-resisting electronic hardware fitting

A plastic-based, double-layer technology, applied in metal material coating process, coating, superimposed layer plating, etc., can solve problems such as skin allergies, nickel metal sensitivity, poor bonding force, etc., and achieve high wear resistance Effect

Inactive Publication Date: 2013-08-28
WUJIANG DONGXIN PLASTIC PACKAGING PLANT
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  • Abstract
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Problems solved by technology

The traditional method is to use copper-nickel-chromium metal layer, but some human body is sensitive to nickel metal, which is easy to cause skin allergies, so nickel-free coating i

Method used

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  • Preparation method of plastic-based copper-chromium double-layered environmental-friendly wear-resisting electronic hardware fitting

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0015] Such as figure 1 As shown, the substrate 1 of the electronic hardware workpiece of the ABS base material is pre-treated to form a chemical nickel layer on the workpiece, and then electroplated in copper pyrophosphate with a small current to obtain a 0.1-0.5 micron pyrocopper coating, and then coated with copper sulfate Electroplate in the solution for 5 minutes to obtain an acid copper plating layer of about 4 microns, and the thickness of the copper layer 2 durin...

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Abstract

The invention discloses a preparation method of plastic-based copper-chromium double-layered environmental-friendly wear-resisting electronic hardware fitting. The method comprises the following steps of: a, after chemical electroless plating copper on the workpiece surface of a base body, pre-plating copper in copper pyrophosphate plating liquor; b, plating acid copper in copper sulfate plating liquor; and c, after plating acid copper for the workpiece, electro-plating in hexavalent chromium plating liquor to obtain a chromium coating, wherein the hexavalent chromium plating liquor is aqueous liquor which contains 300-400g/L chromium trioxide, sulfuric acid and a catalyst, the weight ratio of chromic acid to sulfuric acid is (100-200):1, and the content of the catalyst is 1-10g/L of one or a mixture of silicate, cerium oxide rare earth and neodymium oxide rare earth. The plastic electronic hardware fitting does not contain nickel and meanwhile has higher wear resistance.

Description

technical field [0001] The invention belongs to the technical field of wear resistance of electronic hardware, in particular to the composite surface technology of copper-chromium metal layer. Background technique [0002] At present, many electronic products use plastic as the base material, and multiple metal layers are compounded on the base material to improve its corrosion resistance and wear resistance. The traditional method is to use a copper-nickel-chromium metal layer, but some human bodies are sensitive to nickel metal, which can easily cause skin allergies, so nickel-free treatment is required. However, the current technology for preparing a chromium metal layer on copper metal is immature, the bonding force between the two is poor, and the metal layer is prone to blooming. Contents of the invention [0003] Purpose of the invention: Aiming at the above-mentioned existing problems and deficiencies, the present invention provides a method for preparing plastic-...

Claims

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Application Information

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IPC IPC(8): C23C28/02C25D5/12C25D3/06
Inventor 董建中
Owner WUJIANG DONGXIN PLASTIC PACKAGING PLANT
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