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Aluminum alloy silver-plating pre-treatment method

A technology of aluminum alloy and degreasing treatment, applied in the field of aluminum alloy electroplating, can solve the problems of bubbling and peeling of the silver-plated layer, affecting normal use, etc., and achieve the effect of avoiding bubbling and peeling

Inactive Publication Date: 2015-02-04
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a pre-treatment method for aluminum alloy silver plating, to solve the problem that the silver plating layer on the surface of aluminum alloy parts is bubbling and peeling, which affects normal use

Method used

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  • Aluminum alloy silver-plating pre-treatment method
  • Aluminum alloy silver-plating pre-treatment method
  • Aluminum alloy silver-plating pre-treatment method

Examples

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Embodiment 1

[0027] The method for pre-treatment of aluminum alloy silver plating in this embodiment includes first heat-treating the aluminum alloy to remove stress, and then performing surface treatment, specifically including the following steps:

[0028] 1) Heat treatment: Take ZLXX series aluminum alloy parts, heat them to 195°C in the atmosphere and keep them warm for 2 hours to remove stress;

[0029] 2) Degreasing and degreasing treatment: soak the parts after heat treatment in a degreasing agent, and in the degreasing agent, Na 2 CO 3 The concentration of 10g / L, Na 3 PO 4 12H 2 O concentration 15g / L, Na 2 SiO 3 The concentration of OP-10 emulsifier is 20g / L, the concentration of OP-10 emulsifier is 1.5g / L, and the balance is water; the soaking temperature is 60°C, and the time is 120s to remove the residual oil on the surface of parts;

[0030] 3) One-time water washing: wash the parts after degreasing and degreasing treatment at room temperature for 60s;

[0031] 4) Alkali...

Embodiment 2

[0037] The method for pre-treatment of aluminum alloy silver plating in this embodiment includes first heat-treating the aluminum alloy to remove stress, and then performing surface treatment, specifically including the following steps:

[0038] 1) Heat treatment: Take 2XXX series aluminum alloy parts, heat them to 205°C in the atmosphere and keep them warm for 2 hours to remove stress;

[0039] 2) Degreasing and degreasing treatment: soak the parts after heat treatment in a degreasing agent, and in the degreasing agent, Na 2 CO 3 The concentration of 12g / L, Na 3 PO 4 12H 2 O concentration 18g / L, Na 2 SiO 3 The concentration of OP-10 emulsifier is 15g / L, the concentration of OP-10 emulsifier is 2g / L, and the balance is water; the soaking temperature is 70°C, and the time is 20s to remove the residual oil on the surface of parts;

[0040] 3) One-time water washing: wash the parts after degreasing and degreasing treatment at room temperature for 120s;

[0041]4) Alkali et...

Embodiment 3

[0047] The method for pre-treatment of aluminum alloy silver plating in this embodiment includes first heat-treating the aluminum alloy to remove stress, and then performing surface treatment, specifically including the following steps:

[0048] 1) Heat treatment: Take 5XXX series aluminum alloy parts, heat them to 160°C in the atmosphere and keep them warm for 2 hours to remove stress;

[0049] 2) Degreasing and degreasing treatment: soak the parts after heat treatment in a degreasing agent, and in the degreasing agent, Na 2 CO 3 The concentration of 15g / L, Na 3 PO 4 12H 2 O concentration 20g / L, Na 2 SiO 3 The concentration of OP-10 emulsifier is 10g / L, the concentration of OP-10 emulsifier is 1g / L, and the balance is water; the soaking temperature is 65°C, and the time is 70s to remove the residual oil on the surface of parts;

[0050] 3) One-time water washing: wash the parts after degreasing and degreasing treatment at room temperature for 40s;

[0051] 4) Alkali et...

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Abstract

The invention discloses an aluminum alloy silver-plating pre-treatment method including steps of firstly performing heat-treatment to aluminum alloy for removing a stress and then performance surface treatment. In the aluminum alloy silver-plating pre-treatment method, the aluminum alloy is firstly subjected to the heat-treatment for removing the stress and then is subjected to the surface treatment so that a bubbling and peeling phenomenon is maximumly avoided. A first qualification ratio of an aluminium alloy part silver-plating product can reach 89-91%, which is increased by about 5% with comparison of the first qualification ratio of a silver-plating product through a conventional technology. The method greatly increases the qualification ratio of the product, reduces numbers of repaired and scrapped parts, reduces a production cost and increases an economic benefit. A bonding force between a silver plating layer and an aluminum alloy base material is excellent and quality of the aluminium alloy silver-plating product is improved. A micro-hardness of the silver plating layer of the aluminum alloy part is higher than Hv120, which reaches or exceeds a usage requirement of a high-voltage switch, thereby ensuring safe operation of the high-voltage switch.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy electroplating, and in particular relates to a pretreatment method for aluminum alloy silver plating. Background technique [0002] A large number of high-voltage switches use aluminum alloy parts, and the materials include ZLXX, 2XXX, 5XXX, 6XXX and 7XXX series aluminum alloys. The conductive surfaces of the parts are generally silver-plated to reduce contact resistance and improve the ability of the switch to turn on and off the current. The quality of the silver plating layer is an important guarantee for the safety performance of the switch. The conventional aluminum alloy silver plating process is shown in Table 1. In order to ensure that the quality of the silver-plated layer meets the requirements of use, multiple processes are generally carried out before silver-plating to thoroughly clean the residual oil and generated scale on the surface of the parts, and improve the bonding for...

Claims

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Application Information

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IPC IPC(8): C25D5/34C21D1/00C23G1/00C23F17/00
CPCC25D5/34C21D1/00C23F17/00C23G1/00
Inventor 李宝增林生军袁端鹏郝留成张颖杰张柳丽刘畅刘建权
Owner STATE GRID CORP OF CHINA
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