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Environment-friendly copper and copper alloy pickling agent and copper and copper alloy silver-plating pretreatment method

A technology of copper alloy and pickling agent, which is applied in the field of copper and copper alloy environmental protection pickling agent and copper and copper alloy silver plating pretreatment, which can solve the problems of poor cleaning effect and environmental pollution of acid solution, so as to protect the health of employees , high cleaning quality and low cost

Active Publication Date: 2015-01-28
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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  • Environment-friendly copper and copper alloy pickling agent and copper and copper alloy silver-plating pretreatment method
  • Environment-friendly copper and copper alloy pickling agent and copper and copper alloy silver-plating pretreatment method

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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 environment-friendly copper and copper alloy pickling agent and a copper and copper alloy silver-plating pretreatment method. The pickling agent is prepared from the following ingredients in percentage by mass: 21.5-44.0% of sulfuric acid, 2.5-15.5% of phytic acid, 2.5-10% of sodium nitrate, 0.5-2.0% of dispersing agent and the balance of water. The environment-friendly pickling agent is clean and environment-friendly, has no solvent volatilization, cannot generate acid mist during cleaning, has low pollution, can create a clean environment for pretreatment process, has high copper and copper alloy cleaning quality, and can prevent parts from being over-etched, realizes cleaning of silver-plating pretreatment of copper, copper-like and copper alloy used for high-voltage switches, can improve the operation environment, can protect the health of staffs, can be used repeatedly during cleaning, has the using period which is more 2-3 times than that of the traditional pickling acid, can greatly reduce the cleaning cost, has remarkable comprehensive benefit and 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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IPC IPC(8): C23G1/10C25D5/34
CPCC23G1/103C25D5/34
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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