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Preparation method of compound copper corrosion inhibitor and surface treatment method by using compound copper corrosion inhibitor

A copper corrosion inhibitor and complex matching technology, which is applied in the preparation and surface treatment of complex matching copper corrosion inhibitors, can solve the problems of inferior color and luster to inorganic corrosion inhibitors, limited adsorption force, single type, etc., and achieve good appearance Good appearance, good corrosion resistance, low production cost

Inactive Publication Date: 2011-10-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the limited adsorption of these organic substances on the copper surface, the thickness of the film layer is only tens to hundreds of angstroms, which is easy to scratch and fall off, which affects its slow-release efficiency.
Moreover, the color after treatment is not as good as that of inorganic corrosion inhibitors, so there is no good promotion and application
[0006] After searching the existing technology, it is found that Chinese patent application number 200710138586.8, publication number CN 101182641A, published on May 21, 2008, records a kind of "Rare Earth Copper Corrosion Inhibitor and Its Surface Treatment Process", which involves Rare earth and BTA (benzotriazole) compound-matched copper corrosion inhibitor, but this prior art does not have the best synergistic effect between rare earth and organic matter due to the single type of organic matter, and the corrosion inhibition effect is not ideal , and the appearance is difficult to achieve color uniformity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Weigh CeCl separately 3 、LaCl 3 、Gd 2 o 3 、Lu 2 o 3 Rare earth salt 1.2 grams each, add 20mL of H 2 o 2 The solution dissolves the rare earth salt, and then weighs BTA, 2-mercaptobenzothiazole, citric acid, and copper complexing agent to be 16g, 16g, 8g, and 6g respectively, and dissolves them with a small amount of distilled water respectively to complete the preparation of the base liquid. Configuration, mix the prepared rare earth salt solution and base liquid together, dilute to 1L with distilled water, and add 1.6g of nonylphenol polyoxyethylene ether at the same time, stir well, let stand for 7 hours, and complete after filtration Preparation of corrosion inhibitors.

[0021] 2. Polish the copper alloy copper sample with a diameter of 5cm with metallographic sandpaper until there are no obvious scratches, and then use the chemical degreasing method to remove the oil on the copper surface. The chemical degreasing process is: first configure the chemical d...

Embodiment 2

[0025] 1. Weigh CeCl separately 3 、LaCl 3 、Lu 2 o 3 1.2 grams each of rare earth salts, Gd 2 o 3 : 2.4g, add 20mL of H 2 o 2 The solution dissolves the rare earth salt, and then weighs BTA, 2-mercaptobenzothiazole, citric acid, and copper complexing agent to be 12g, 24g, 24g, and 8g respectively, and dissolves them with a small amount of distilled water respectively to complete the preparation of the base liquid. Configuration, mix the prepared rare earth salt solution and base liquid together, dilute to 1L with distilled water, and add 1.6g of nonylphenol polyoxyethylene ether at the same time, stir well, let stand for 7 hours, and complete after filtration Preparation of corrosion inhibitors.

[0026]2. Polish the copper alloy copper sample with a diameter of 5cm with metallographic sandpaper until there is no obvious scratch, then wipe the copper surface with acetone to remove the oil on the copper surface, and put the copper sample with a concentration of 15 %H 2 ...

Embodiment 3

[0030] 1. Weigh CeCl separately 3 、LaCl 3 、Lu 2 o 3 0.8 grams each of rare earth salts, Gd 2 o 3 : 2.4g, add 20mL of H 2 o 2 The solution dissolves the rare earth salt, and then weighs BTA, 2-mercaptobenzothiazole, citric acid, and copper complexing agent to be 16g, 24g, 8g, and 10g respectively, and dissolves them with a small amount of distilled water respectively to complete the preparation of the base liquid. Configuration, mix the prepared rare earth salt solution and the base solution together, and dilute to 1L with distilled water, and add 1.2g of nonylphenol polyoxyethylene ether at the same time, stir well, let stand for 7 hours, and complete after filtering Preparation of corrosion inhibitors.

[0031] 2. Polish the copper alloy copper sample with a diameter of 5cm with metallographic sandpaper until there are no obvious scratches, and then use the chemical degreasing method to remove the oil on the copper surface. The chemical degreasing process is: first con...

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Abstract

The invention relates to a preparation method of a compound copper corrosion inhibitor and a surface treatment method by using the compound copper corrosion inhibitor, belonging to the technical field of metal surface treatment. The compound copper corrosion inhibitor comprises BTA (benzotriazole), 2-mercaptobenzothiazole, mixed rare earth salt, surfactant, citric acid, copper complexing agent and the balance of water. By combining the surface treatment technique with the electrochemical treatment technique, the invention shortens the formation time of the corrosion inhibition film on the copper surface and enhances the efficiency of the surface treatment technique.

Description

technical field [0001] The invention relates to an anti-corrosion method in the technical field of metal surface treatment, in particular to a preparation and surface treatment method of a complex-matched copper corrosion inhibitor. Background technique [0002] Copper has excellent strength, machinability, thermal conductivity, electrical conductivity, weldability and corrosion resistance. It has been widely used in various fields such as industry, military and civilian for a long time. Under normal circumstances, copper is listed as one of the metals with high corrosion resistance, but it will cause serious corrosion in harsh environments, which will have adverse effects on its production, use and secondary processing. Therefore, research and It is of great significance to develop corrosion inhibitors for copper and copper alloys. At present, the corrosion inhibitors of copper and its alloys mainly include: [0003] Inorganic corrosion inhibitor: Inorganic salt corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/16C25D9/02
Inventor 何国樊良伟张敏达何献忠
Owner SHANGHAI JIAO TONG UNIV
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