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No-palladium activating recipe for chemical nickel plating on plastic surface and its technological process

A palladium-free activation and surface chemical technology, applied in liquid chemical plating, metal material coating process, coating, etc., to achieve uniform particle dispersion and good wear resistance

Inactive Publication Date: 2006-05-17
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Description
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AI Technical Summary

Problems solved by technology

At room temperature, the reduction method is used to obtain active nickel, and the electroless nickel plating with active nickel instead of metal palladium has no palladium activation process and formula.

Method used

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Examples

Experimental program
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Embodiment

[0013] Electroless nickel plating formula and process:

[0014] (1) Formula and process conditions of chemical degreasing liquid

[0015] Sodium Phosphate 50g / L

[0016] Anhydrous sodium carbonate 30g / L

[0017] Sodium hydroxide 25g / L

[0018] Sodium dodecyl sulfonate amount

[0019] Time (t) 20min

[0020] Temperature (T) 50~60℃

[0021] (2) Coarsening solution formula and process conditions

[0022] Potassium dichromate 30g / L

[0023] Sulfuric acid 100mL / L

[0024] Time (t) 10min

[0025] Temperature (T) 60°C

[0026] (3) Activation solution formula and process conditions

[0027] Nickel acetate 66.67g / methanol (L);

[0028] Sodium borohydride 66.67g / methanol (L);

[0029] Temperature (°C): room temperature

[0030] Time (min): 30

[0031] The activation method is: dissolve nickel acetate in methanol, and dissolve sodium borohydride in methanol; when activating, first put the plastic substrate into the nickel acetate alcohol solution, and then pour the sodium b...

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PUM

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Abstract

The present invention discloses no-palladium activating solution recipe for chemical nickel plating on plastic surface and its technological process. The recipe of the no-palladium activating solution for pre-treatment before chemical nickel plating includes mainly nickel acetate, sodium borohydride and methanol. The activating process includes the steps of: dissolving nickel acetate in methanol, dissolving sodium borohydride in methanol, setting plastic sheet inside methanol solution of nickel acetate, adding the methanol solution of sodium borohydride into the methanol solution of nickel acetate to activate, and final ageing for some time. The present invention prepares active nickel by means of reducing sodium borohydride at normal temperature, and the activating process with nickel to replace palladium has the advantage of low temperature operation.

Description

technical field [0001] The invention relates to the field of non-metal electroless plating, in particular to a pretreatment formula and process before electroless nickel plating on plastic surfaces. Background technique [0002] Electroless plating is one of the effective ways to metallize non-metallic materials due to its excellent characteristics such as plating parts with complex shapes, uniform coating thickness, high hardness, good wear resistance and corrosion resistance. Electroless nickel plating occupies an important position in the field of electroless plating. In the electroless nickel plating on non-conductors, a layer of electroless plating catalyst must first be formed on the substrate. The traditional process is to use PdCl 2 -SnCl 2 Activation - sensitization method. However, the process is complex, using PdCl 2 It is expensive and toxic, so its application is limited. Therefore, the continuous development of low-cost, environmentally friendly, and precio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/30
Inventor 刘峥杨振波
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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