Method for preparing nickel-copper alloy plating layer on surface of carbon steel

A technology of nickel-copper alloy and carbon steel, which is applied in the field of preparing nickel-copper alloy coating on the surface of carbon steel, can solve the problems of poor bonding force and low thermal conductivity, and achieve the effect of ensuring bonding force, high thermal conductivity, and high hardness

Pending Publication Date: 2021-04-16
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are applied to the anti-corrosion of fluorine-making electrolytic cells, and there are problems such as low thermal conductivity and poor bonding force.

Method used

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  • Method for preparing nickel-copper alloy plating layer on surface of carbon steel
  • Method for preparing nickel-copper alloy plating layer on surface of carbon steel
  • Method for preparing nickel-copper alloy plating layer on surface of carbon steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Workpiece grinding: Q235 carbon steel is selected as the electroplating cathode material, and processed into a rectangular sample of 50mm×25mm×2mm. Drill a small hole directly above the top of the sample, and the size of the hole is 2mm in diameter. Grind the sample with 180#, 400#, 800#, 1000# water-resistant sandpaper on the grinding and polishing machine in turn to remove rust and burrs on the surface of the workpiece. Scratch, flat and bright, surface roughness between 200±50nm. The processed workpiece is riveted with copper wire. Electroplating anode materials are also ground in the same way. After sanding, it is riveted with copper wire and the joints are sealed with epoxy.

[0044] (2) Alkaline washing and degreasing: immerse the polished workpiece in an alkaline washing solution at 55°C for 20 minutes to remove grease and impurities on the surface of the workpiece. The composition of alkaline lotion is: sodium hydroxide 5g / L, sodium carbonate 15g / L, tris...

Embodiment 2

[0059] (1) Workpiece grinding: refer to the method described in Example 1;

[0060] (2) Alkaline cleaning and degreasing: immerse the polished workpiece in an alkaline washing solution at 60°C for 10 minutes to remove grease and impurities on the surface of the workpiece. The composition of alkaline lotion is: sodium hydroxide 15g / L, sodium carbonate 20g / L, trisodium phosphate 35g / L, sodium silicate 15g / L, sodium dodecylbenzene sulfonate 1g / L. The preparation of alkaline washing solution is with reference to the preparation method described in Example 1.

[0061] (3) Hot water washing: with reference to the method described in Example 1;

[0062] (4) Cold water washing: with reference to the method described in Example 1;

[0063] (5) Pickling: Immediately immerse the washed workpiece in the pickling solution for 2 minutes to remove the oxide film on the surface of the workpiece and activate the surface of the workpiece. The composition of the pickling solution is: 5% sulfu...

Embodiment 3

[0069] see Figure 8 ,use Figure 8 The electroplating system shown produces a nickel-copper alloy coating on the inner surface of an electrolytic cell.

[0070](1) Grinding and installation of the tank body: Polish the inner wall of the electrolytic cell (cathode) made of carbon steel with 180 mesh to 2000 mesh sandpaper until the surface roughness is between 250±50nm and remove impurities. After the cathode is cleaned, keep it dry, put it in the designated place, and connect the water inlet and outlet pipelines. The anode should be polished to a flat surface without impurities and burrs, and it should be cleaned with purified water.

[0071] (2) Equipment installation: After the preparatory work is completed, install the anode plate and adjust the distance to 50~100mm, install the cathode and anode power lines, water inlet and outlet pipes, temperature sensors, and air-tight covers.

[0072] (3) Pipeline water temperature preheating: Turn on the test data report record sw...

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Abstract

The invention discloses a method for preparing a nickel-copper alloy plating layer on the surface of carbon steel. The method specifically comprises the following steps: (1) pretreatment, wherein a carbon steel workpiece is pretreated to obtain a carbon steel base material for later use; (2) preparation of an electroplating solution, wherein nickel sulfate, copper sulfate, trisodium citrate, boric acid, an additive and a brightener are dissolved in deionized water to prepare the electroplating solution for later use, and the concentrations of nickel sulfate, copper sulfate, trisodium citrate, boric acid, the additive and the brightener in the electroplating solution are 170-200 g/L, 5-20 g/L, 60-100 g/L, 10-25 g/L, 0.05-1 g/L and 0.1-1 g/L respectively; and (3) preparation of the nickel-copper alloy plating layer, wherein the carbon steel base material is immersed into the electroplating solution, the carbon steel base material serves as a cathode, one of monel alloy, pure nickel, graphite and pure copper serves as an anode, and electroplating deposition is conducted on the carbon steel base material to form the nickel-copper alloy plating layer. The nickel-copper alloy plating layer prepared through the method not only can effectively solve the problem of corrosion of a fluorine-making electrolytic cell made of carbon steel, but also has good thermal conductivity and strong binding force with the carbon steel base material.

Description

technical field [0001] The invention belongs to the technical field of nickel-copper alloy coatings, and in particular relates to a method for preparing nickel-copper alloy coatings on the surface of carbon steel. Background technique [0002] Since the fluorine chemical industry entered industrialization in the 1930s, it has become a rapidly developing emerging industry due to the characteristics of good product performance, diverse varieties, wide application range, and high economic benefits. Products cover all aspects of life, such as construction industry, automobile manufacturing industry, electronic processing industry, aerospace and military industry, medical and pharmaceutical industries, etc. With the invention and manufacture of new fluorine-containing materials, the scope of application is constantly being expanded by people. [0003] The most mature fluorine production technology in the fluorine chemical industry is the electrolytic fluorine production method. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/36C23G1/19C23G1/08C23G1/06
Inventor 林修洲胡豪窦宝捷方治文郑丽赵世雄高秀磊卢建红张雪
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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