Copper material passivator, preparation and application thereof

A technology of passivating agent and copper material, which is applied in the field of surface passivation treatment, can solve the problems of prone to macula and poor corrosion resistance, and achieve the effects of excellent salt spray resistance, easy operation and excellent corrosion resistance

Inactive Publication Date: 2016-11-23
合肥普庆新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the copper passivators on the market are passivators mainly composed of BTA, but it is easy to appear yellow spots, poor corrosion resistance and other phenomena.

Method used

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  • Copper material passivator, preparation and application thereof
  • Copper material passivator, preparation and application thereof
  • Copper material passivator, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of copper passivator: put 3 parts of benzotriazole and 2.5 parts of absolute ethanol in 400 parts of water, stir and mix to promote the dissolution of benzotriazole to obtain a colorless and transparent solution; then add 2 parts of OP-10, 1 part of dimethylglycine phosphonoglycine and 1.5 parts of polyacrylic acid resin are stirred and mixed, and finally 590 parts of water are added to obtain a uniformly mixed copper passivator.

[0029] The application method of copper passivation agent: at room temperature, put the cleaned brass and red copper into the passivation agent for surface passivation treatment, and the soaking time is 8 minutes. Then use the air flow to blow off the residual liquid on the surface of the copper until there is no visible residual liquid, put it into the drying tunnel for drying to promote film formation; the drying temperature is 150°C, and the drying time is 5 minutes.

Embodiment 2

[0031] The preparation method of copper passivator: put 0.1 part of benzotriazole and 10 parts of absolute ethanol in 300 parts of water, stir and mix to promote the dissolution of benzotriazole to obtain a colorless and transparent solution; then add 10 parts of Stir and mix OP-10, 0.1 part of hydroxyhexylidene diphosphonic acid and 0.1 part of polyurethane resin, and finally add 679.7 parts of water to obtain a uniformly mixed passivator for copper materials.

[0032] The application method of copper passivation agent: at room temperature, put the cleaned brass and red copper into the passivation agent for surface passivation treatment, soaking time is 2min. Then use the air flow to blow off the residual liquid on the surface of the copper until there is no visible residual liquid, put it into the drying tunnel for drying to promote film formation; the drying temperature is 80°C, and the drying time is 20 minutes.

Embodiment 3

[0034] The preparation method of copper passivator: put 8 parts of benzotriazole and 0.5 part of absolute ethanol in 500 parts of water, stir and mix to promote the dissolution of benzotriazole to obtain a colorless and transparent solution; then add 0.5 parts of OP-10, 3 parts of 2-phospho-1,2,4-tricarboxylic acid butane and 3 parts of polyvinyl alcohol resin are stirred and mixed, and finally 485 parts of water are added to obtain a uniformly mixed copper passivator.

[0035] The application method of copper passivation agent: at room temperature, put the cleaned brass and red copper into the passivation agent for surface passivation treatment, soaking time is 5min. Then use the air flow to blow off the residual liquid on the surface of the copper until there is no visible residual liquid, put it into the drying tunnel for drying to promote film formation; the drying temperature is 100°C, and the drying time is 10 minutes.

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Abstract

The invention relates to the technical field of surface passivating treatment, in particular to a copper material passivator, preparation and application thereof. The copper material passivator comprises 0.1 to 10 parts by weight of benzotriazole (BTA), 0.1 to 10 parts by weight of a wetting agent, 0.1 to 5 parts by weight of organic phosphonic acid, 0.1 to 10 parts by weight of absolute ethyl alcohol and 0.1 to 5 parts by weight of film forming matters, and water is supplemented till the weight part of all the components is 1000 parts. A preparation method comprises the steps of putting BTA and absolute ethyl alcohol into water, and stirring and mixing to promote dissolution of BTA, so as to obtain a colorless and transparent solution; and then, sequentially adding the wetting agent, organic phosphonic acid and the film forming matters, stirring and mixing, and finally, adding the remaining water, so as to obtain the uniformly mixed copper material passivator. According to the copper material passivator, the high molecular resin film forming matters are introduced and exert a synergistic function with BTA; through a drying procedure, a layer of compact passive film is quickly formed on the surface of a copper material, and excellent corrosion resistance is achieved; and the color of the passive film formed through the passivator does not change after the passive film is hung indoors for 180 days.

Description

technical field [0001] The invention relates to the technical field of surface passivation treatment, in particular to a copper passivation agent and its preparation and application. Background technique [0002] Copper is widely used in electronics and decoration industries due to its excellent performance and beautiful color. However, due to the active chemical properties of copper, it is easy to cause copper damage during its production, use, storage and transportation. The discoloration and corrosion of the surface of the material will seriously affect the appearance and electrical conductivity of the product. In order to improve its surface quality and service life, anti-corrosion treatment must be carried out. The passivation treatment method is widely used due to its advantages of less energy consumption, simple equipment, and easy operation. [0003] Traditional copper surface passivation treatment processes mainly include inorganic chromate and organic benzotriazol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/52
CPCC23C22/52
Inventor 侯伟何宗文
Owner 合肥普庆新材料科技有限公司
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