Environment-friendly silver plating process for plating silver on surface of aluminum alloy once

An aluminum alloy surface, aluminum alloy technology, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve problems such as environmental pollution, avoid secondary pollution, dense silver layer, improve bonding force. Effect

CN110527993AInactive Publication Date: 2019-12-03STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-12-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of aluminum alloy electroplating, and particularly relates to an environment-friendly silver plating process for plating the silver on the surface of an aluminum alloy once. The method specifically comprises the steps of surface polishing and smoothing, roughening treatment, hydroxylation treatment, KH580 surface modification and environment-friendly silver plating. According to the method, the silver layer is directly plated on the Al and Al alloy at a time, the silver layer is compact and is thin and uniform in thickness, the binding force betweenAg and Al is effectively improved, and the cost can be greatly reduced under the condition that the quality is not reduced. According to the present invention, from the perspective of environmental protection and the aspect of environmental sustainable development, the problems of environmental pollution and toxicity are solved because no cyaniding aqueous solution is used.
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Description

technical field

[0001] The invention belongs to the technical field of aluminum alloy electroplating, and in particular relates to an environment-friendly silver plating process for one-time silver plating on the surface of an aluminum alloy. Background technique

[0002] Substation circuit breakers and GIS external wiring boards are mostly made of aluminum alloy conductor materials, and the high-temperature coastal industries have harsh corrosion environments and high Cl - The corrosion of aluminum conductor materials is very serious in complex and harsh environments with high concentrations. The silver plating process on the surface of aluminum and aluminum alloys is complex, usually through chemical degreasing---water washing---alkali corrosion---water washing---lighting---water washing---one-time immersion zinc---removing zinc--- Washing---Second Zinc Dip---Washing---Cyanide Copper Plating---Washing---Silver Plating---Recycling---Washing---Hot Water Washing---Drying---P...

Examples

Embodiment 1

[0025] The environmentally friendly silver plating process of one-time silver plating on the aluminum alloy surface includes: electroless plating process: smooth surface polishing → roughening treatment → hydroxylation treatment → KH580 surface modification → environmentally friendly silver plating.

[0026] The specific process is as follows:

[0027] Step S1 coarsening treatment: Add 2 mL of HCl solution dropwise into 18 mL of deionized water, and add 3.4 g of NH 4 F, stirring and dissolving to obtain a roughening solution; immerse the aluminum alloy sample in the roughening solution, and ultrasonicate for 10 minutes under low-frequency ultrasonic conditions to roughen the surface;

[0028] Step S2 hydroxylation treatment: configure a NaOH solution with a mass fraction of 10%, immerse the sample treated in step S1 in the NaOH solution, and sonicate for 10 minutes under low-frequency ultrasonic conditions;

[0029] Step S3 KH580 surface modification treatment: Dissolve KH580...

Embodiment 2

[0034] The environmentally friendly silver plating process of one-time silver plating on the aluminum alloy surface includes: electroless plating process: smooth surface polishing → roughening treatment → hydroxylation treatment → KH580 surface modification → environmentally friendly silver plating.

[0035] The specific process is as follows:

[0036] Step S1 coarsening treatment: Add 2 mL of HCl solution dropwise into 18 mL of deionized water, and add 3.4 g of NH 4 F, stirring and dissolving to obtain a roughening solution; immerse the aluminum alloy sample in the roughening solution, and ultrasonicate for 10 minutes under low-frequency ultrasonic conditions to roughen the surface;

[0037] Step S2 hydroxylation treatment: configure a NaOH solution with a mass fraction of 10%, immerse the sample treated in step S1 in the NaOH solution, and sonicate for 10 minutes under low-frequency ultrasonic conditions;

[0038] Step S3 KH580 surface modification treatment: Dissolve KH580...

Embodiment 3

[0043] The environmentally friendly silver plating process of one-time silver plating on the aluminum alloy surface includes: electroless plating process: smooth surface polishing → roughening treatment → hydroxylation treatment → KH580 surface modification → environmentally friendly silver plating.

[0044] The specific process is as follows:

[0045] Step S1 coarsening treatment: Add 2 mL of HCl solution dropwise into 18 mL of deionized water, and add 3.4 g of NH 4 F, stirring and dissolving to obtain a roughening solution; immerse the aluminum alloy sample in the roughening solution, and ultrasonicate for 10 minutes under low-frequency ultrasonic conditions to roughen the surface;

[0046] Step S2 hydroxylation treatment: configure a NaOH solution with a mass fraction of 10%, immerse the sample treated in step S1 in the NaOH solution, and sonicate for 10 minutes under low-frequency ultrasonic conditions;

[0047] Step S3 KH580 surface modification treatment: Dissolve KH580...