Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Copper piece surface passivating treatment fluid

A technology of passivation treatment and copper parts, which is applied in the field of copper parts surface, can solve the problems of poor heat and humidity resistance of passivation treatment liquid, affect the health of operators, and complex components of passivation liquid, so as to improve the heat and humidity resistance, Improved passivation effect and slow film formation

Inactive Publication Date: 2017-04-05
NANTONG BOTAO CHEM
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the passivation of copper and copper alloy products is mainly cleaned by chromic acid and other treatment solutions or their mixtures, but the wastewater after cleaning and passivation treatment using these treatment solutions contains hexavalent chromium ions, which seriously pollutes the environment and affects the safety of operators. Healthy body
[0004] In response to the above phenomenon, people have improved the passivation treatment solution. For example, the invention patent with application number CN86103910.6 uses benzotriazole and polyvinyl alcohol as passivation agents, but this patent still uses a small amount of chromic acid; The invention patent with application number CN200810187682.6 uses benzotriazole 5-8g / l, 1-phenyl-5 mercaptotetrazolium 2-4g / l, tartaric acid (or citric acid) 14-18g / l, molybdenum The mixed solution of sodium tungstate (or sodium tungstate) 2-4g / l and sodium lauryl sulfate 0.5-1g / l can passivate brass, but the composition of the passivation solution is complex and expensive sodium molybdate or sodium tungstate; the invention patent with application number CN201010595972 .1 uses a mixture of phytic acid, hydrogen peroxide, boric acid, polyethylene glycol, etc. to passivate brass, but this method is also very complicated in composition and plant The phosphorus content in the acid (phytic acid) is very high, which will lead to an increase in the chemical oxygen demand (COD) in the wastewater; and there is a common problem in the above patents: the passivation treatment solution has poor heat and humidity resistance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The passivation treatment solution on the surface of the copper part of the present embodiment, the passivation treatment solution consists of benzotriazole 3g / L, sodium phosphate 220mg / L, citric acid 12g / L, colloidal silicon dioxide 90mg / L and wetting agent 7ml / L; Among them, the wetting agent is a mixture of polyethylene glycol and polyvinyl alcohol, and the polyethylene glycol is 4.41ml / L, and the polyvinyl alcohol is 2.59ml / L.

Embodiment 2

[0013] The passivation treatment solution on the surface of the copper part of the present embodiment, the passivation treatment solution consists of benzotriazole 3g / L, sodium phosphate 220mg / L, citric acid 12g / L, colloidal silicon dioxide 90mg / L and wetting agent 7ml / L; Among them, the wetting agent is a mixture of polyethylene glycol and polyvinyl alcohol, and the polyethylene glycol is 4.88ml / L, and the polyvinyl alcohol is 2.12ml / L.

Embodiment 3

[0015] The passivation treatment solution on the surface of the copper part of the present embodiment, the passivation treatment solution consists of benzotriazole 3g / L, sodium phosphate 220mg / L, citric acid 12g / L, colloidal silicon dioxide 90mg / L and wetting agent 7ml / L; Among them, the wetting agent is a mixture of polyethylene glycol and polyvinyl alcohol, and the polyethylene glycol is 4.67ml / L, and the polyvinyl alcohol is 2.33ml / L.

[0016] The following table 1 is the mass ratio of each raw material in the wetting agent in Examples 1 to 3:

[0017] Table 1 The mass ratio of each raw material in the wetting agent in Examples 1-3

[0018] D Example 1 Example 2 Example 3 polyethylene glycol 1.7 2.3 2 polyvinyl alcohol 1 1 1

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a copper piece surface passivating treatment fluid. The passivating treatment fluid is composed of 3-7 g / L of benzotriazole, 180-220 mg / L of sodium phosphate, 6-12 g / L of citric acid, 60-90 mg / L of colloidal silicon dioxide and 5-7 ml / L of a wetting agent; and the wetting agent is formed by mixing polyethylene glycol and polyving akohol, and the mass ratio of polyethylene glycol to the polyving akohol is (1.7-2.3):1. The copper piece surface passivating treatment fluid has the beneficial effects that through the synergistic effect of all components, the hydrothermal resisting property of the passivating treatment fluid is greatly improved; in addition, during passivating treatment, chromium ions are not contained, and the environmental protection performance is greatly strengthened; and meanwhile, expensive raw materials are not contained, and the cost of the passivating treatment fluid is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion and protection, in particular to a copper surface [0002] Passivation treatment solution. Background technique [0003] The processing volume of copper and copper alloy in China is about 10 million tons per year, and its annual output value is more than 600 billion yuan. Generally, after machining copper and copper alloy workpieces, passivation treatment is required to improve their discoloration and corrosion resistance. At present, the passivation of copper and copper alloy products is mainly cleaned by chromic acid and other treatment solutions or their mixtures, but the wastewater after cleaning and passivation treatment using these treatment solutions contains hexavalent chromium ions, which seriously pollutes the environment and affects the safety of operators. In good health. [0004] In response to the above phenomenon, people have improved the passivation treatment solution. F...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/08
CPCC23C22/08
Inventor 黄海涛王宏李桂萍
Owner NANTONG BOTAO CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products