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A kind of tin salt sensitization activation method for electroless plating on titanium alloy surface

A technology of surface chemistry and activation method, which is applied in the field of tin salt sensitization and activation of chemical plating on the surface of titanium alloy, can solve the problems of reducing the service life of the workpiece, cracking of the coating, reducing the wear resistance and corrosion resistance of the coating, and improving the combination The effect of increasing strength, improving wear resistance, and improving surface hardness

Active Publication Date: 2022-01-28
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing electroless plating pretreatment technology has the situation that the bonding force between the coating and the surface of the titanium alloy is not strong, and the preparation stability is not high. The surface of the titanium alloy is prone to cracking, peeling or even peeling off, which will greatly reduce the wear resistance of the coating. And corrosion resistance, so that the workpiece is easily worn and scrapped, reducing the service life of the workpiece

Method used

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  • A kind of tin salt sensitization activation method for electroless plating on titanium alloy surface
  • A kind of tin salt sensitization activation method for electroless plating on titanium alloy surface
  • A kind of tin salt sensitization activation method for electroless plating on titanium alloy surface

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Embodiment 1

[0036] A tin salt sensitization activation method for electroless plating on titanium alloy surface, is characterized in that, comprises the following steps:

[0037] Step 1. Mechanical grinding and polishing: Use 320, 800, 1000, 1500, 2000, 3000# metallographic sandpaper in sequence to mechanically grind and polish the TC4 titanium alloy sample. After polishing, soak it in alcohol and store it for later use;

[0038] Step 2. Organic degreasing: Soak the mechanically polished titanium alloy sample in acetone, ultrasonically clean it for 10 minutes, and then rinse it with 85°C deionized water;

[0039] Step 3, chemical alkali cleaning and degreasing: soak the titanium alloy sample after organic degreasing in the alkaline cleaning solution, soak for 15 minutes at 85°C; then rinse it with deionized water; the components contained in the alkaline cleaning solution and Its content is: sodium hydroxide 20g / L, anhydrous sodium carbonate 18g / L, trisodium phosphate 25g / L, sodium methyl...

Embodiment 2

[0048] A tin salt sensitization activation method for electroless plating on titanium alloy surface, is characterized in that, comprises the following steps:

[0049] Step 1. Mechanical grinding and polishing: Use 320, 800, 1000, 1500, 2000, 3000# metallographic sandpaper in sequence to mechanically grind and polish the TC4 titanium alloy sample. After polishing, soak it in alcohol and store it for later use;

[0050] Step 2. Organic degreasing: Soak the mechanically polished titanium alloy sample in acetone, ultrasonically clean it for 8 minutes, and then rinse it with 85°C deionized water;

[0051] Step 3, chemical alkali washing and degreasing: soak the titanium alloy sample after organic degreasing in the alkali washing solution, soak for 13 minutes at 85°C; then rinse it with deionized water; the components contained in the alkali washing solution and Its content is: sodium hydroxide 25g / L, anhydrous sodium carbonate 15g / L, trisodium phosphate 20g / L, sodium methyl silicat...

Embodiment 3

[0061] A tin salt sensitization activation method for electroless plating on titanium alloy surface, is characterized in that, comprises the following steps:

[0062] Step 1. Mechanical grinding and polishing: Use 320, 800, 1000, 1500, 2000, 3000# metallographic sandpaper in sequence to mechanically grind and polish the TC4 titanium alloy sample. After polishing, soak it in alcohol and store it for later use;

[0063] Step 2. Put the mechanically ground and polished titanium alloy sample into a supercritical device, soak it in a supercritical acetone-water system with a temperature of 355°C-375°C and a pressure of 9-15MPa for 4-6min; then use deionized water Rinse well; the volume ratio of acetone to water in the supercritical acetone-water system is 2:1; rinse with deionized water;

[0064] Step 3, chemical alkali washing and degreasing: soak the titanium alloy sample after organic degreasing in the alkali washing solution, soak for 13 minutes at 85°C; then rinse it with deio...

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Abstract

The invention discloses a tin salt sensitization activation method for electroless plating on the surface of titanium alloy, comprising: mechanically grinding and polishing titanium alloy, organic degreasing, chemical alkali washing degreasing, acid etching, zinc immersion once, and zinc stripping , secondary zinc dipping, sensitization: put the titanium alloy sample after secondary zinc dipping into the sensitizing solution, soak at room temperature for 2-5 minutes; then rinse it with deionized water; electroless plating: at 90-100°C, Put the sensitized titanium alloy sample into the electroless plating solution for 2-3 hours, rinse it with deionized water at 60°C-70°C, and dry it to complete the preparation of nickel-boron coating on the surface of the titanium alloy. The electroless nickel-boron coating prepared by the method can improve the bonding strength between the electroless coating and the titanium alloy substrate; significantly improve the wear resistance of the titanium alloy; at the same time, the coating can improve the surface hardness of the titanium alloy and significantly improve the wear resistance of the titanium alloy. Surface hardness.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and relates to a tin salt sensitization and activation method for electroless plating on the surface of a titanium alloy. Background technique [0002] As a lightweight structural material with excellent performance, titanium alloy has high specific strength, specific stiffness, good processability, corrosion resistance and high temperature resistance and other excellent mechanical properties in aerospace, marine automobile, weapon engineering, medical It has been widely used in many fields such as equipment and chemical energy. Especially in the field of aerospace, titanium alloy is widely used as an aerospace material. In practical applications, for example, high-frequency vibrations and thermal alternation during aircraft service put forward higher requirements on the surface wear resistance of titanium alloys. However, ordinary titanium and titanium alloys have poor wear res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/18C23C18/36C23G1/20C23G1/10
CPCC23C18/1844C23C18/1806C23C18/182C23C18/36C23G1/205C23G1/106
Inventor 曾春兰余家欣贾尧齐慧敏赖建平胡洪涂兴梅张亚锋何洪途涂馨颖
Owner SOUTHWEAT UNIV OF SCI & TECH
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