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A kind of copper and copper alloy environment-friendly pickling agent, copper and copper alloy silver plating pretreatment method

A technology of copper alloy and pickling agent, applied in the field of copper and copper alloy environmental protection pickling agent, copper and copper alloy silver plating pretreatment field, can solve the problems of acid solution environmental pollution, poor cleaning effect, etc., and achieve high cleaning quality , protect the health of employees, and ensure the effect of environmental protection and cleaning

Active Publication Date: 2017-01-04
HENAN PINGGAO ELECTRIC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an environmentally friendly pickling agent for copper and copper alloys, which solves the problems of poor cleaning effect of existing copper and copper alloy pre-treatment cleaning agents and serious environmental pollution of the acid solution used

Method used

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  • A kind of copper and copper alloy environment-friendly pickling agent, copper and copper alloy silver plating pretreatment method
  • A kind of copper and copper alloy environment-friendly pickling agent, copper and copper alloy silver plating pretreatment method

Examples

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Effect test

Embodiment 1

[0026] The copper and copper alloy environment-friendly pickling agent of the present embodiment comprises the component of following mass percent: mass concentration is 98% sulfuric acid 21.5%, phytic acid (cyclohexyl hexaphosphate) 15.5%, sodium nitrate 10%, Dispersant 1.0%, balance is water.

[0027] Wherein, the dispersant comprises the following components by mass percentage: sodium lauryl sulfate 30%, potassium monododecyl phosphate 30%, carboxyethyl thiosuccinic acid 20%, polyethylene glycol 20020 %.

[0028] The copper and copper alloy silver plating pretreatment method of the present embodiment may further comprise the steps:

[0029] 1) Degreasing treatment: Take the copper parts, soak them in a degreasing agent at 70°C for 3 minutes and take them out; the degreasing agent includes the following components: NaOH 8g / L, NaOH 2 CO 3 60g / L, Na 3 PO 4 12H 2 O 54g / L, Na 2 SiO 3 7g / L, the balance is water;

[0030] 2) One-time water washing: at room temperature, wa...

Embodiment 2

[0035] The copper and copper alloy environment-friendly pickling agent of the present embodiment comprises the component of following mass percent: mass concentration is the sulfuric acid 29.0% of 98%, phytic acid (cyclohexyl hexaphosphate) 10.5%, sodium nitrate 2.5%, Dispersant 2.0%, balance is water.

[0036] Wherein, the dispersant comprises the following components by mass percentage: sodium lauryl sulfate 30%, potassium monododecyl phosphate 30%, carboxyethyl thiosuccinic acid 20%, polyethylene glycol 20020 %.

[0037] The copper and copper alloy silver plating pretreatment method of the present embodiment may further comprise the steps:

[0038] 1) Degreasing treatment: Take the brass parts, soak them in a degreasing agent at 60°C for 5 minutes and take them out; the degreasing agent includes the following components: NaOH 9g / L, NaOH 2 CO 3 57g / L, Na 3 PO 4 12H 2 O 50g / L, Na 2 SiO 3 10g / L, the balance is water;

[0039]2) One-time water washing: at room temperat...

Embodiment 3

[0044] The copper and copper alloy environment-friendly pickling agent of the present embodiment comprises the component of following mass percent: mass concentration is 98% sulfuric acid 36%, phytic acid (cyclohexyl hexaphosphate) 5%, sodium nitrate 7.5%, Dispersant 0.5%, the balance is water.

[0045] Wherein, the dispersant comprises the following components by mass percentage: sodium lauryl sulfate 30%, potassium monododecyl phosphate 30%, carboxyethyl thiosuccinic acid 20%, polyethylene glycol 20020 %.

[0046] The copper and copper alloy silver plating pretreatment method of the present embodiment may further comprise the steps:

[0047] 1) Degreasing treatment: take the bronze parts, soak them in a degreasing agent at 65°C for 4 minutes, and then take them out; the degreasing agent includes the following components: NaOH 10g / L, NaOH 2 CO 3 53g / L, Na 3 PO 4 12H 2 O 60g / L, Na 2 SiO 3 5g / L, the balance is water;

[0048] 2) One-time water washing: at room temperat...

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Abstract

The invention discloses an environmentally friendly pickling agent for copper and copper alloys, and a method for pre-treating copper and copper alloys for silver plating. The pickling agent comprises the following components by mass percentage: sulfuric acid 21.5%-44.0%, phytic acid 2.5%-15.5% %, sodium nitrate 2.5% to 10%, dispersant 0.5% to 2.0%, and the balance is water. The environmentally friendly pickling agent of the invention is clean and environmentally friendly, the solution does not volatilize, does not produce acid mist during the cleaning process, has low pollution, and can create a clean environment for the pretreatment process; Parts are not prone to over-corrosion; realize the pre-treatment and cleaning of various copper, copper-like and copper alloys that are widely used in high-voltage switches, improve the working environment and protect the health of employees; can be used repeatedly during the cleaning process, and the use cycle Compared with the traditional pickling solution, it is 2 to 3 times longer, greatly reduces the cleaning cost, and has significant comprehensive benefits, which is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of cleaning copper and copper alloys, and in particular relates to an environment-friendly pickling agent for copper and copper alloys, and also relates to a pretreatment method for silver plating of copper and copper alloys. Background technique [0002] A large number of conductive parts of high-voltage switches and high-current products use copper and copper alloys, such as red copper, brass and bronze alloys. The quality is very important to the conductivity of the switch. In order to meet the quality requirements of the silver-plated layer, the pre-treatment of silver-plating generally needs to thoroughly clean the residual oil and scale on the surface of the parts to improve the bonding force between the silver-plated layer of the parts and the substrate. In the prior art, the pre-treatment process is as follows: : degreasing + water washing + hydrochloric acid washing + water washing + mixed pickling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/10C25D5/34
Inventor 李宝增张红军李宏楼林生军沈晓张颖杰张柳丽袁端鹏路亚娟王战辉
Owner HENAN PINGGAO ELECTRIC
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