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Copper metal surface anticorrosion treatment method

A processing method and technology of copper metal, applied in the direction of metal material coating process, coating, etc., can solve the problems of loss of active sites, chemical sites that cannot provide activity, complicated and complicated processes, etc.

Inactive Publication Date: 2015-05-20
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] "Monolayers and mixed-layers on copper towards corrosion protection" published by F.Sinapi, S.Julien, D.Auguste, L.Hevesi, J.Delhalle, Z.Mekhalif, etc. (Electrochimica Acta, 2008, 53, 4228-4238) It is disclosed that 3-mercapto three-level trimethoxysilane compounds are used as self-assembled molecules, and nano-films are prepared on copper surfaces, but the nano-films formed are in the state of non-polymeric films, and the formed films are hydrophilic and have anti-corrosion properties. limited
The paper then turned it into a hydrophobic film by assembling hydrophobic silane on the first layer of nano-film, and the anti-corrosion performance was significantly improved; however, the hydrophobic double-layer film lost the active sites for continuous modification, and the The process is relatively cumbersome and complicated
"The corrosion and inhibition of copper powders" (Corrosion Science, 1991, 32, 1237-1252) published by Kunio Mori, Yoshihiro Okai, Hiroshi Horie, Hiroshi Yamada, etc. reported self-assembly of s-triazine dithiol compounds on the surface of copper powder , to form polymeric nano-films of this type of compound, which greatly improves the anti-corrosion ability; but this type of polymeric film has hydrophobic functional groups, which cannot provide active chemical sites for other subsequent processes

Method used

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Embodiment 1

[0024] figure 1 It is a flow chart of the steps of the copper metal surface anticorrosion treatment method according to the embodiment of the present invention.

[0025] refer to figure 1 , the copper surface anti-corrosion treatment method according to the embodiment of the present invention comprises the following steps:

[0026] In step 110, the pure copper is immersed in the alcohol-water mixed solution of the s-triazinedithiol silane compound, and self-assembles on the surface of the pure copper to form a primary nano-film.

[0027] Specifically, in this embodiment, the sheet of pure copper whose size is 50mm×30mm×0.2mm is first cleaned on its surface before being immersed in the alcohol-water mixed solution of s-triazinedithiol silane compound. .

[0028] The cleaning method is as follows: ultrasonically wash the pure copper substrate with acetone for 10 minutes, and after drying at room temperature, degrease and decontaminate the pure copper surface with 1% nitric ac...

Embodiment 2

[0036] In the description of Embodiment 2, the similarities with Embodiment 1 will not be repeated here, and only the differences with Embodiment 1 will be described. The difference between embodiment 2 and embodiment 1 is that in step 110, the base is a cupronickel (copper alloy with nickel as the main additive element) sheet with a size of 50mm * 50mm * 0.2mm, and the cupronickel sheet is treated with ethanol Ultrasonic cleaning for 15min, after drying at room temperature, cleaning and drying with 5% sulfuric acid solution; place the cleaned white copper sheet in an alcohol-water mixed solution containing 5mmol / L s-triazinedithiol compound (the volume of ethanol and water ratio of 1:19), self-assembly was carried out at room temperature; after 30 minutes of self-assembly, the white copper sheet with the first layer of nano-film was obtained by washing and drying.

[0037] In this embodiment, the s-triazine dithiol compound is:

[0038]

[0039] In step 120, the temperatu...

Embodiment 3

[0042] In the description of Embodiment 3, the similarities with Embodiment 1 will not be repeated here, and only the differences with Embodiment 1 will be described. The difference between embodiment 3 and embodiment 1 is that in step 110, the substrate is a brass (copper-zinc alloy) sheet with a size of 50mm×20mm×0.4mm, and the brass sheet is ultrasonically cleaned with acetone for 20 minutes, After drying at room temperature, clean and dry with 2% nitric acid solution; place the cleaned brass sheet in an alcohol-water mixed solution containing 4mmol / L s-triazinedithiol compound (the volume ratio of methanol and water is 1 : 19), self-assembly is carried out at room temperature; after self-assembly 30min, the brass sheet with the first layer nano film is obtained through cleaning and drying.

[0043] In this embodiment, the s-triazine dithiol compound is:

[0044]

[0045] In step 120, the temperature of thermal polymerization is 150°C and the time is 30 minutes to form ...

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Abstract

The invention discloses a copper metal surface anticorrosion treatment method. The method comprises the steps: A, immersing copper metal into an alcohol-water mixed solution of an s-triazine ethanedithiol silane compound, and forming a primary layer nano film on the surface of the copper metal in a self-assembling way; B, carrying out thermal polymerization on the copper metal with the primary layer nano film, and forming a polymerized nano film on the surface of the copper metal. The treatment method is not only suitable for the pure copper, but also is suitable for the copper alloy. The copper metal surface after being treated in the method can be prevented from being corroded and also has an active site, and the subsequent other technological treatment can be carried out. The treatment method is simple to operate; moreover, the anticorrosion effect of the copper metal surface after being treated is good.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment and surface modification, and in particular relates to a copper metal surface anticorrosion treatment method. Background technique [0002] Copper and its alloys are widely used in electronics, communications, electrical engineering, light industry, machinery manufacturing, construction and national defense industries, and are also one of the indispensable and important metal materials. However, copper and its alloys are exposed to the atmosphere or water. Corrosion easily occurs, resulting in waste of copper resources. [0003] Many surface treatment processes can improve the anti-corrosion performance of copper and its alloys, among which the nano-film prepared by self-assembly method has a certain effect. Usually prepared nano-films with anti-corrosion properties are in a hydrophobic state, which can effectively prevent copper from contacting with water and reduce the chance of...

Claims

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Application Information

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IPC IPC(8): C23C26/00C08G77/28
Inventor 王亚斌董亚萍乃学瑛李武
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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