Protective agent for copper and copper alloy and preparation method thereof

A copper alloy and protective agent technology, applied in the field of protective agent and metal protective agent, can solve the problems of unsatisfactory passivation effect, flow marks on the surface, high passivation temperature, etc., and achieve easy acquisition, best corrosion resistance effect, and preparation The effect of simple method

Active Publication Date: 2013-12-25
华阳新兴科技(天津)集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional copper passivation process is hexavalent chromium, which has a good passivation effect, but due to the serious pollution of hexavalent chromium, the country has explicitly banned
Although the currently used benzotriazole products have low pollution, the passivation temperature is high, the time is long, the passivation effect is not ideal, and there are flow marks on the surface

Method used

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  • Protective agent for copper and copper alloy and preparation method thereof
  • Protective agent for copper and copper alloy and preparation method thereof

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preparation example Construction

[0041] A preparation method for copper and copper alloy protective agent, the steps are as follows:

[0042] ⑴First make the semi-finished product H-01, the preparation method is as follows:

[0043] Add water to a reaction kettle, add potassium hydroxide, add tribasic carboxylic acid N485 under stirring, and maintain the temperature at 40-50°C for 2 hours, stop stirring and let stand for 24 hours before use;

[0044] ⑵In another reaction kettle, add water and mix ethylenediaminetetraacetic acid disodium, borax, Corrguard SI, benzotriazole, semi-finished product H-01, and absolute ethanol in sequence under stirring;

[0045] (3) Stir the materials in the reaction kettle evenly for 60-80 minutes, and the finished copper and copper alloy protective agent will be finished after the solution becomes a uniform transparent liquid.

[0046] The quality standard of copper and copper alloy protective agent:

[0047] Appearance: colorless transparent liquid;

[0048] Specific gravity...

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Abstract

The invention relates to a protective agent for copper and copper alloy and a preparation method of the protective agent. The protective agent comprises the following raw materials by weight percent: 0.2-1% of ethylenediaminetetraacetic acid disodium salt, 1.5-2% of Corrguard SI, 0.5-0.9% of benzotriazole, 1-2% of sodium tetraborate, 10-12% of absolute ethyl alcohol, 1.5-2.5% of self-made semi-manufactured goods and the balance of water. The protective agent does not contain hexavalent chromium capable of polluting the environment, the problems that the film formed by benzotriazole is not uniform, flow marks exist on the film, the passivating temperature is high, and the passivating time is long can be overcome by the compounding of the raw materials, the environmental conservation is good, the film is biodegradable, the filming is uniform, and the protective agent has the advantages of being anti-corrosion, incapable of generating flow marks, being passivated at room temperature with short passivating time (5-10min), low in cost and capable of being diluted by 20 times for use, and ensuring that the copper color is uniform and can not grow dim within one month in the moist mould rains seasons.

Description

technical field [0001] The invention belongs to the field of metal protective agents, and relates to protective agents, in particular to a copper and copper alloy protective agent and a preparation method thereof. Background technique [0002] During the processing and storage of copper and alloys, they are often eroded by humid environments and corrosive gases to cause copper corrosion, which causes the color of the copper surface to change. The traditional copper passivation process is hexavalent chromium, which has a good passivation effect, but due to the serious pollution of hexavalent chromium, the country has explicitly banned it. Although the currently used benzotriazole products have low pollution, the passivation temperature is high, the time is long, the passivation effect is not ideal, and there are flow marks on the surface. [0003] Through searching, the following two published patent documents were found: [0004] A water-soluble copper protective agent and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/00
Inventor 朱国梅王鹏吕砚辉
Owner 华阳新兴科技(天津)集团有限公司
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