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A neutral passivator for copper

A passivating agent and neutral technology, applied in the coating process of metal materials, etc., can solve problems such as easy loss of color and brightness, pollution of environmental emissions, and impact on human health, so as to achieve good cleaning effect and improve Corrosion resistance and high cleaning efficiency

Active Publication Date: 2021-01-26
东莞市精诚环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the salt spray test is carried out on the workpiece soaked in alkaline passivation solution, the salt spray test time generally appears within 3 hours. The surface not only tends to lose its original color and brightness, but also contains harmful substances, which have an impact on human health and pollute the environment.

Method used

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  • A neutral passivator for copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A copper neutral passivator is composed of the following components by weight: 22% of thickener, 15% of antioxidant, 0.3% of antirust agent, 9% of organic solvent and 53.7% of deionized water.

[0034] Wherein, the thickener is polyethylene glycol 600.

[0035] Wherein, the antioxidant is a mixture of 11% by weight of mercaptobenzothiazole and 4% by weight of benzotriazole.

[0036] Wherein, the rust inhibitor is orthophosphate.

[0037] Wherein, the organic solvent is absolute ethanol.

[0038] In one of the embodiments, the method for making the copper neutral passivator into a working fluid is as follows: Step 1: Put the antioxidant and the antirust agent in the above-mentioned weight ratio into the reactor respectively, and then put the After the temperature rises to 72°C, the mixture of antioxidant and antirust agent put into the reactor is evenly stirred, the stirring speed is 100 rpm, and the stirring time is 16 minutes.

[0039] Step 2: put the organic solven...

Embodiment 2

[0046] A copper neutral passivator is composed of the following components by weight: 23% of thickener, 16% of antioxidant, 0.4% of antirust agent, 10% of organic solvent and 50.6% of deionized water.

[0047]Wherein, the thickener is a mixture of 20% polyethylene glycol 600 by weight and 3% polyethylene glycol 400 by weight.

[0048] Wherein, the antioxidant is a mixture of 10% by weight of mercaptobenzothiazole, 3% by weight of benzotriazole and 3% by weight of tolylbenzotriazole.

[0049] Wherein, the antirust agent is a mixture of 0.2% by weight of orthophosphate and 0.2% by weight of potassium salt of hydroxyethylidene diphosphonate.

[0050] Wherein, the organic solvent is a mixture of absolute ethanol with a weight ratio of 8% and isopropyl acetate with a weight ratio of 2%.

[0051] In one of the embodiments, the method for making the copper neutral passivator into a working fluid is as follows: Step 1: Put the antioxidant and the antirust agent in the above-mentioned...

Embodiment 3

[0059] A neutral passivator for copper material is composed of the following ingredients in weight ratio: 24% of thickener, 14% of antioxidant, 0.5% of antirust agent, 8.5% of organic solvent and 53% of deionized water.

[0060] Wherein, the thickener is a mixture of polyethylene glycol 600 with a weight ratio of 23% and polyethylene glycol 6000 with a weight ratio of 1%.

[0061] Wherein, the antioxidant is a mixture of 12% by weight of mercaptobenzothiazole and 2% by weight of tolylbenzotriazole.

[0062] Wherein, the rust inhibitor is 0.2% by weight of orthophosphate, 0.1% by weight of triethanolamine borate, 0.1% by weight of fatty alcohol ether phosphate potassium salt and 0.1% by weight of Mixture of potassium salt of hydroxyethylidene diphosphonate.

[0063] Wherein, the organic solvent is a mixture of 4% isopropyl acetate and 4.5% isopropyl acetate by weight.

[0064] In one of the embodiments, the method for making the copper neutral passivator into a working fluid ...

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Abstract

The invention relates to a copper neutral passivator, which is composed of the following ingredients in weight ratio: thickener 20%-25%, antioxidant 13%-17%, antirust agent 0.2%-0.5%, organic solvent 8% %‑10% and deionized water 47.5%‑58.8%. The present invention is a neutral passivation solution developed based on the surface treatment of copper materials. After the copper material is soaked in this product, it can form a protective film on the surface of the copper material that significantly enhances its anti-corrosion performance, and it can also Prolong the salt spray time of copper, so that it has excellent acid resistance and alkali resistance. During the process of copper processing, this product will not react with copper, and will not change the original size and color of copper. The surface of the copper material treated with it can still maintain the color and brightness of the workpiece itself, and it can be discharged after simple treatment after use, and its discharge has no pollution to the environment and is green and environmentally friendly.

Description

technical field [0001] The invention relates to a neutral passivator for copper materials. Background technique [0002] Copper is a non-ferrous metal closely related to human beings. It is widely used in electric power, electronics, In the fields of energy and petrochemicals, machinery and metallurgy, transportation, light industry, emerging industries and high technology, copper is second only to aluminum in the consumption of non-ferrous metal materials in my country. In the foreign construction industry, the total consumption of refined copper accounts for 48% of the total. [0003] Since the 1990s, with the rapid development of China's economy, the rapid construction of urban infrastructure, the transfer of manufacturing to China, and the inflow of a large amount of foreign capital, China has become the concentration of the world's factories and copper consumption growth. In the domestic power industry, the total consumption of refined copper accounts for 53% of the to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/68
CPCC23C22/68
Inventor 粟飞
Owner 东莞市精诚环保科技有限公司
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